LEMON Manuals: Even more car manuals for everyone
Home >> Mercury >> 2010 >> Milan Base, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 1110 (Supplemental Inflatable Restraint System) >> Diagnostic Tests >> Air Bag and Safety Belt Pretensioner Supplemental Restraint System (SRS) >> Pinpoint Tests >> Pinpoint Test G: LFC 19/21/ DTC B2293 - Restraint System - Air Bag Fault >> Pinpoint Test G: DTC B2293 - Restraint System - Air Bag Fault

Pinpoint Test G: DTC B2293 - Restraint System - Air Bag Fault

WARNING: This page is about a different car, the 2008 Ford RV Cutaway, 2008 Ford Econoline, 2008 Ford E450 Super Duty, and 2008 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
WARNING: Always wear eye protection when servicing a vehicle. Failure to follow this instruction may result in serious personal injury.
WARNING: Never probe the electrical connectors on air bag, safety canopy or side air curtain modules. Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death.
NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
NOTE: Most faults are due to connector and/or wiring concerns. Carry out a thorough inspection and verification before proceeding with the pinpoint test.
NOTE: Supplemental restraint system (SRS) components should only be disconnected or reconnected when instructed to do so within a pinpoint test step. Failure to follow this instruction may result in incorrect diagnosis of the SRS. 
NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer.
  1. G1 CHECK FOR CONTINUOUS AND ON-DEMAND DTCs 
    • Key in ON position.
    • Enter the following diagnostic mode on the diagnostic tool: Self Test/Retrieve and Record On-Demand and Continuous Memory DTCs
    • Enter the following diagnostic mode on the diagnostic tool: DataLogger/View and Record All B2293 Fault PIDs
      • Refer to PID list in Normal Operation to view B2293 fault PIDs.
    • Do any on-demand DTC B2293 fault PIDs indicate a fault? 
    1. YES  : This is a hard fault. The fault condition is still present. This fault cannot be cleared until it is corrected and the DTC is no longer retrieved during the on-demand self test.

      Using the fault PIDs recorded, go to the appropriate pinpoint test step.

      For 2293_28_OD (Air Bag Inflator Circuit Resistance Low - Loop No. 1, Front Driver Side), go to  G2.

      For 2293_29_OD (Air Bag Circuit Open - Loop No. 1, Front Driver Side), go to  G2.

      For 2293_31_OD (Air Bag Circuit Short to Ground - Loop No. 1, Front Driver Side), go to  G10.

      For 2293_30_OD (Air Bag Circuit Short to Battery - Loop No. 1, Front Driver Side), go to  G13.

      For 2293_24_OD (Air Bag Inflator Circuit Resistance Low - Loop No. 1, Front Passenger Side), go to  G15.

      For 2293_25_OD (Air Bag Circuit Open - Loop No. 1, Front Passenger Side), go to  G15.

      For 2293_27_OD (Air Bag Circuit Short to Ground - Loop No. 1, Front Passenger Side), go to  G21.

      For 2293_26_OD (Air Bag Circuit Short to Battery - Loop No. 1, Front Passenger Side), go to  G23.

    2. NO  : This is an intermittent fault when present as a continuous memory DTC only (DTC not retrieved on-demand). The fault condition is not present at this time.

      Using the fault PIDs recorded, go to the appropriate pinpoint test step.

      For 2293_28_CM (Air Bag Inflator Circuit Resistance Low - Loop No. 1, Front Driver Side), go to  G28.

      For 2293_29_CM (Air Bag Circuit Open - Loop No. 1, Front Driver Side), go to  G28.

      For 2293_31_CM (Air Bag Circuit Short to Ground - Loop No. 1, Front Driver Side), go to  G29.

      For 2293_30_CM (Air Bag Circuit Short to Battery - Loop No. 1, Front Driver Side), go to  G31.

      For 2293_24_CM (Air Bag Inflator Circuit Resistance Low - Loop No. 1, Front Passenger Side), go to  G28.

      For 2293_25_CM (Air Bag Circuit Open - Loop No. 1, Front Passenger Side), go to  G28.

      For 2293_27_CM (Air Bag Circuit Short to Ground - Loop No. 1, Front Passenger Side), go to  G30.

      For 2293_26_CM (Air Bag Circuit Short to Battery - Loop No. 1, Front Passenger Side), go to  G32.

  2. G2 CHECK THE DRIVER AIR BAG MODULE RESISTANCE PID (D_ABAGR) 
    • Enter the following diagnostic mode on the diagnostic tool: DataLogger/PID
    • Enter the following diagnostic mode on the diagnostic tool: D_ABAGR (Driver Air Bag) Resistance PID
    • Does the resistance PID value read between 1.84 and 3.96 ohms? 
    1. YES  : Go to  G27.
    2. NO  : Go to  G3.
  3. G3 MONITOR THE DRIVER AIR BAG (D_ABAGR) MODULE RESISTANCE PID WHILE CARRYING OUT A HARNESS TEST 
      NOTE: Do not remove the driver air bag module from its mounted position at this time.
    • Continue monitoring the D_ABAGR (Driver Air Bag) resistance PID while carrying out a harness test of the driver air bag circuits and accessible connectors (including any inline connectors) by wiggling and flexing the wire harness, connectors and rotating the steering wheel frequently.
    • Does the resistance PID value read between 1.84 and 3.96 ohms while carrying out the harness test? 
    1. YES  : DEPOWER the SRS and REPAIR the connector, terminals or wire harness or INSTALL a new clockspring as needed. REFER to Clockspring . Refer to SYSTEM WIRING DIAGRAMS - E350 SUPER DUTY , Connector Repair Procedures for schematic and connector information. Go to  G34.
    2. NO  : If the driver air bag module resistance PID is less than 1.84 ohms, go to  G4.

      If the driver air bag module resistance PID is greater than 3.96 ohms, go to  G7.

  4. G4 CHECK THE DRIVER AIR BAG MODULE FOR LOW RESISTANCE  
    NOTE: This pinpoint test step will attempt to change the fault reported by the RCM by inducing a different fault condition. If the fault reported changes, this indicates the RCM is functioning correctly and is not the source of the fault.
    • Key in OFF position.
    • Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Remove the driver air bag module. Refer to Driver Air Bag Module .
    • Repower the SRS. Do not  prove out the SRS at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Enter the following diagnostic mode on the diagnostic tool: Self Test/Retrieve and Record On-Demand and Continuous Memory DTCs
    • Enter the following diagnostic mode on the diagnostic tool: DataLogger/View and Record the Following Fault PIDs
      • 2293_28_OD (Air Bag Inflator Circuit Resistance Low - Loop No. 1, Front Driver Side)
      • 2293_29_OD (Air Bag Circuit Open - Loop No. 1, Front Driver Side)
    • DIAGNOSTIC TIP:  When viewing DTC B2293 on-demand fault PIDs with the driver air bag module disconnected, open circuit faults would normally be retrieved.
    • Did the driver air bag module on-demand fault PIDs change from indicating a low resistance to an open circuit fault? 
    1. YES  : Go to  G24.
    2. NO  : Go to  G5.
  5. G5 CHECK FOR A SHORT BETWEEN DRIVER AIR BAG MODULE CIRCUITS BETWEEN THE CLOCKSPRING AND RCM 
    NOTE: This pinpoint test step will attempt to change the fault reported by the RCM by inducing a different fault condition. If the fault reported changes, this indicates the RCM is functioning correctly and is not the source of the fault.
    • Key in OFF position.
    • Disconnect: Clockspring C218a
    • Key in ON position.
    • Enter the following diagnostic mode on the diagnostic tool: Self Test/Retrieve and Record On-Demand and Continuous Memory DTCs
    • Enter the following diagnostic mode on the diagnostic tool: DataLogger/View and Record the Following Fault PIDs
      • 2293_28_OD (Air Bag Inflator Circuit Resistance Low - Loop No. 1, Front Driver Side)
      • 2293_29_OD (Air Bag Circuit Open - Loop No. 1, Front Driver Side)
    • DIAGNOSTIC TIP:  When viewing DTC B2293 on-demand fault PIDs with the driver air bag module/clockspring disconnected, open circuit faults would normally be retrieved.
    • Did the driver air bag module on-demand fault PIDs change from indicating a low resistance to an open circuit fault? 
    1. YES  : Go to  G26.
    2. NO  : Go to  G6.
  6. G6 CHECK THE RCM FOR LOW RESISTANCE 
    • Key in OFF position.
    • Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Disconnect: RCM C310a and C310b
      • Fig 1: Checking Circuits For Short Together
      G03989625Courtesy of FORD MOTOR CO.
    • Measure the resistance between RCM C310a pin 3 and C310a pin 4, component side.
    • Is the resistance greater than 10,000 ohms? 
    1. YES  : REPAIR circuit 614 (GY/OG) and circuit 615 (GY/WH). Go to  G34.
    2. NO  : Go to  G27.
  7. G7 CHECK THE DRIVER AIR BAG MODULE FOR AN OPEN 
    NOTE: This pinpoint test step will attempt to change the fault reported by the RCM by inducing a different fault condition. If the fault reported changes, this indicates the RCM is functioning correctly and is not the source of the fault.
    • Key in OFF position.
    • Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Remove the driver air bag module. Refer to Driver Air Bag Module .
    • Connect a fused jumper wire between driver air bag module electrical connector pin-1, harness side and pin-2, harness side.
    • Repower the SRS. Do not  prove out the SRS at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Enter the following diagnostic mode on the diagnostic tool: Self Test/Retrieve and Record On-Demand and Continuous Memory DTCs
    • Enter the following diagnostic mode on the diagnostic tool: DataLogger/View and Record the Following Fault PIDs
      • 2293_28_OD (Air Bag Inflator Circuit Resistance Low - Loop No. 1, Front Driver Side)
      • 2293_29_OD (Air Bag Circuit Open - Loop No. 1, Front Driver Side)
    • DIAGNOSTIC TIP:  When viewing DTC B2293 on-demand fault PIDs with the driver air bag module circuits shorted together, a low resistance fault would normally be retrieved.
    • Did the driver air bag module on-demand fault PIDs change from indicating a open circuit to a low resistance fault? 
    1. YES  : Go to  G24.
    2. NO  : Go to  G8.
  8. G8 CHECK THE DRIVER AIR BAG MODULE CIRCUITS FOR AN OPEN BETWEEN CLOCKSPRING AND RCM 
    NOTE: This pinpoint test step will attempt to change the fault reported by the RCM by inducing a different fault condition. If the fault reported changes, this indicates the RCM is functioning correctly and is not the source of the fault.
    • Key in OFF position.
    • Remove the fused jumper wire from driver air bag module electrical connector.
    • Disconnect: Clockspring C218a
    • Connect a fused jumper wire between clockspring C218a-2, circuit 614 (GY/OG), harness side and clockspring C218a-10, circuit 615 (GY/WH), harness side.
    • Key in ON position.
    • Enter the following diagnostic mode on the diagnostic tool: Self Test/Retrieve and Record On-Demand and Continuous Memory DTCs
    • Enter the following diagnostic mode on the diagnostic tool: DataLogger/View and Record the Following Fault PIDs
      • 2293_28_OD (Air Bag Inflator Circuit Resistance Low - Loop No. 1, Front Driver Side)
      • 2293_29_OD (Air Bag Circuit Open - Loop No. 1, Front Driver Side)
    • DIAGNOSTIC TIP:  When viewing DTC B2293 on-demand fault PIDs with the driver air bag module circuits shorted together, a low resistance fault would normally be retrieved.
    • Did the driver air bag module on-demand fault PIDs change from indicating a open circuit to a low resistance fault? 
    1. YES  : Go to  G26.
    2. NO  : Go to  G9.
  9. G9 CHECK THE DRIVER AIR BAG MODULE CIRCUIT 614 (GY/OG) AND CIRCUIT 615 (GY/WH) FOR AN OPEN BETWEEN CLOCKSPRING AND RCM 
    • Key in OFF position.
    • Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Remove the fused jumper wire from the clockspring connector.
    • Disconnect: RCM C310a and C310b
      • Fig 2: Checking Driver Air Bag Module Circuit 614 (GY/OG) & 615 (GY/WH) For An Open Between Clockspring & RCM
      GF0044527Courtesy of FORD MOTOR CO.
    • Measure the resistance between RCM C310a-4, circuit 614 (GY/OG), harness side and clockspring C218a-3, circuit 614 (GY/OG), harness side; and between RCM C310a-3, circuit 615 (GY/WH), harness side and clockspring C218a-1, circuit 615 (GY/WH), harness side.
    • Are the resistances less than 0.5 ohm? 
    1. YES  : Go to  G27.
    2. NO  : REPAIR circuit 614 (GY/OG) or 615 (GY/WH). Go to  G34.
  10. G10 CHECK THE DRIVER AIR BAG MODULE FOR A SHORT TO GROUND 
    NOTE: This pinpoint test step will attempt to change the fault reported by the RCM by inducing a different fault condition. If the fault reported changes, this indicates the RCM is functioning correctly and is not the source of the fault.
    • Key in OFF position.
    • Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Remove the driver air bag module. Refer to Driver Air Bag Module .
    • Repower the SRS. Do not  prove out the SRS at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Enter the following diagnostic mode on the diagnostic tool: Self Test/Retrieve and Record On-Demand and Continuous Memory DTCs
    • Enter the following diagnostic mode on the diagnostic tool: DataLogger/View and Record the Following Fault PIDs
      • 2293_31_OD (Air Bag Circuit Short to Ground - Loop No. 1, Front Driver Side)
      • 2293_29_OD (Air Bag Circuit Open - Loop No. 1, Front Driver Side)
    • DIAGNOSTIC TIP:  When viewing DTC B2293 on-demand fault PIDs with the driver air bag module disconnected, open circuit faults would normally be retrieved.
    • Did the driver air bag module on-demand fault PIDs change from indicating a short to ground to an open circuit fault? 
    1. YES  : Go to  G24.
    2. NO  : Go to  G11.
  11. G11 CHECK THE DRIVER AIR BAG MODULE CIRCUITS FOR A SHORT TO GROUND BETWEEN RCM AND CLOCKSPRING 
    NOTE: This pinpoint test step will attempt to change the fault reported by the RCM by inducing a different fault condition. If the fault reported changes, this indicates the RCM is functioning correctly and is not the source of the fault.
    • Key in OFF position.
    • Disconnect: Clockspring C218a
    • Key in ON position.
    • Enter the following diagnostic mode on the diagnostic tool: Self Test/Retrieve and Record On-Demand and Continuous Memory DTCs
    • Enter the following diagnostic mode on the diagnostic tool: DataLogger/View and Record the Following Fault PIDs
      • 2293_31_OD (Air Bag Circuit Short to Ground - Loop No. 1, Front Driver Side)
      • 2293_29_OD (Air Bag Circuit Open - Loop No. 1, Front Driver Side)
    • DIAGNOSTIC TIP:  When viewing DTC B2293 on-demand fault PIDs with the clockspring disconnected, open circuit faults would normally be retrieved.
    • Did the driver air bag module on-demand fault PIDs change from indicating a short to ground to an open circuit fault? 
    1. YES  : Go to  G26.
    2. NO  : Go to  G12.
  12. G12 CHECK CIRCUITS 614 (GY/OG) AND 615 (GY/WH) FOR A SHORT TO GROUND BETWEEN THE RCM AND CLOCKSPRING 
    • Key in OFF position.
    • Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Disconnect: RCM C310a and C310b
      • Fig 3: Checking Circuits 614 (GY/OG) & 615 (GY/WH) For A Short To Ground Between RCM & Clockspring
      GF0044528Courtesy of FORD MOTOR CO.
    • Measure the resistance between clockspring C218a-3, circuit 614 (GY/OG), harness side and ground; and between clockspring C218a-1, circuit 615 (GY/WH), harness side and ground.
    • Are the resistances greater than 10,000 ohms? 
    1. YES  : Go to  G27.
    2. NO  : Due to the shorting bar feature in the RCM electrical connector, the fault can exist in either circuit. Do not remove or defeat the shorting bar.

      REPAIR circuit 614 (GY/OG) or circuit 615 (GY/WH). Go to  G34.

  13. G13 CHECK THE DRIVER AIR BAG MODULE CIRCUITS FOR A SHORT TO VOLTAGE BETWEEN RCM AND CLOCKSPRING 
    NOTE: This pinpoint test step will attempt to change the fault reported by the RCM by inducing a different fault condition. If the fault reported changes, this indicates the RCM is functioning correctly and is not the source of the fault.
    • Key in OFF position.
    • Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Remove the driver air bag module. Refer to Driver Air Bag Module .
    • Disconnect: Clockspring C218a
    • Repower the SRS. Do not  prove out the SRS at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Enter the following diagnostic mode on the diagnostic tool: Self Test/Retrieve and Record On-Demand and Continuous Memory DTCs
    • Enter the following diagnostic mode on the diagnostic tool: DataLogger/View and Record the Following Fault PIDs
      • 2293_30_OD (Air Bag Circuit Short to Battery - Loop No. 1, Front Driver Side)
      • 2293_29_OD (Air Bag Circuit Open - Loop No. 1, Front Driver Side)
    • DIAGNOSTIC TIP:  When viewing DTC B2293 on-demand fault PIDs with the driver air bag module/clockspring disconnected, open circuit faults would normally be retrieved.
    • Did the driver air bag module on-demand fault PIDs change from indicating a short to battery to an open circuit fault? 
    1. YES  : Go to  G26.
    2. NO  : Go to  G14.
  14. G14 CHECK CIRCUITS 614 (GY/OG) AND 615 (GY/WH) FOR A SHORT TO VOLTAGE BETWEEN THE RCM AND CLOCKSPRING 
    • Key in OFF position.
    • Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Disconnect: RCM C310a and C310b
    • Repower the SRS. Do not  prove out the SRS at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Key in ON position.
      • Fig 4: Checking Circuits 614 (GY/OG) & 615 (GY/WH) For A Short To Voltage Between RCM & Clockspring
      GF0044529Courtesy of FORD MOTOR CO.
    • Measure the voltage between clockspring C218a-3, circuit 614 (GY/OG), harness side and ground; and between clockspring C218a-1, circuit 615 (GY/WH), harness side and ground.
    • Are the voltages less than 0.2 volt? 
    1. YES  : Go to  G27.
    2. NO  : Due to the shorting bar feature in the RCM electrical connector, the fault can exist in either circuit. Do not remove or defeat the shorting bar.

      REPAIR circuit 614 (GY/OG) or circuit 615 (GY/WH). Go to  G34.

  15. G15 CHECK THE PASSENGER AIR BAG (P_ABAGR) MODULE RESISTANCE PID 
    • Enter the following diagnostic mode on the diagnostic tool: DataLogger/PID
    • Enter the following diagnostic mode on the diagnostic tool: P_ABAGR (Passenger Air Bag) Resistance PID
    • Does the resistance PID value read between 1.50 and 3.04 ohms? 
    1. YES  : Go to  G27.
    2. NO  : Go to  J16.
  16. J16 MONITOR THE PASSENGER AIR BAG (P_ABAGR) MODULE RESISTANCE PID WHILE CARRYING OUT A HARNESS TEST  
    NOTE: Do not remove the passenger air bag module from its mounted position at this time.
    • With the passenger air bag in its mounted position, continue monitoring the P_ABAGR (passenger air bag) module resistance PID while carrying out a harness test of the passenger air bag module circuits and accessible connectors (including any inline connectors), by wiggling connectors and flexing the wire harness.
    • Does the resistance PID value read between 1.50 and 3.04 ohms while carrying out the harness test? 
    1. YES  : DEPOWER the SRS and REPAIR the connector, terminals or wire harness as needed. Refer to SYSTEM WIRING DIAGRAMS - E350 SUPER DUTY , Connector Repair Procedures for schematic and connector information. Go to  G34.
    2. NO  : If the passenger air bag module resistance PID is less than 1.50 ohms, go to  G17.

      If the passenger air bag module resistance PID is greater than 3.04 ohms, go to  G19.

  17. G17 CHECK THE PASSENGER AIR BAG MODULE FOR LOW RESISTANCE 
    NOTE: This pinpoint test step will attempt to change the fault reported by the RCM by inducing a different fault condition. If the fault reported changes, this indicates the RCM is functioning correctly and is not the source of the fault.
    • Key in OFF position.
    • Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Disconnect: Passenger Air Bag Module C256
    • Repower the SRS. Do not  prove out the SRS at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Enter the following diagnostic mode on the diagnostic tool: Self Test/Retrieve and Record On-Demand and Continuous Memory DTCs
    • Enter the following diagnostic mode on the diagnostic tool: DataLogger/View and Record the Following Fault PIDs
      • 2293_24_OD (Air Bag Inflator Circuit Resistance Low - Loop No. 1, Front Passenger Side)
      • 2293_25_OD (Air Bag Circuit Open - Loop No. 1, Front Passenger Side)
    • DIAGNOSTIC TIP:  When viewing DTC B2293 on-demand fault PIDs with the passenger air bag module disconnected, open circuit faults would normally be retrieved.
    • Did the passenger air bag module on-demand fault PIDs change from indicating a low resistance to an open circuit fault? 
    1. YES  : Go to  G25.
    2. NO  : Go to  G18.
  18. G18 CHECK THE RCM FOR LOW RESISTANCE 
    • Key in OFF position.
    • Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Disconnect: RCM C310a and C310b
      • Fig 5: Measuring Resistance Between RCM C310A Pin 1 & C310A Pin 2, Component Side
      GF0031183Courtesy of FORD MOTOR CO.
    • Measure the resistance between RCM C310a pin 1 and C310a pin 2, component side.
    • Is the resistance greater than 10,000 ohms? 
    1. YES  : REPAIR circuits 607 (LB/OG) and 616 (PK/BK). Go to  G34.
    2. NO  : Go to  G27.
  19. G19 CHECK THE PASSENGER AIR BAG MODULE FOR AN OPEN 
    NOTE: This pinpoint test step will attempt to change the fault reported by the RCM by inducing a different fault condition. If the fault reported changes, this indicates the RCM is functioning correctly and is not the source of the fault.
    • Key in OFF position.
    • Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Disconnect: Passenger Air Bag Module C256
    • Connect a fused jumper wire between passenger air bag module C256-1, circuit 607 (LB/OG), harness side and C256-2, circuit 616 (PK/BK), harness side.
    • Repower the SRS. Do not  prove out the SRS at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Enter the following diagnostic mode on the diagnostic tool: Self Test/Retrieve and Record On-Demand and Continuous Memory DTCs
    • Enter the following diagnostic mode on the diagnostic tool: DataLogger/View and Record the Following Fault PIDs
      • 2293_24_OD (Air Bag Inflator Circuit Resistance Low - Loop No. 1, Front Passenger Side)
      • 2293_25_OD (Air Bag Circuit Open - Loop No. 1, Front Passenger Side)
    • DIAGNOSTIC TIP:  When viewing DTC B2293 on-demand fault PIDs with the passenger air bag module circuits shorted together, a low resistance fault would normally be retrieved.
    • Did the passenger air bag module on-demand fault PIDs change from indicating an open circuit to a low resistance fault? 
    1. YES  : Go to  G25.
    2. NO  : Go to  G20.
  20. G20 CHECK THE PASSENGER AIR BAG MODULE CIRCUITS FOR AN OPEN BETWEEN PASSENGER AIR BAG MODULE AND RCM 
    • Key in OFF position.
    • Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Disconnect: RCM C310a and C310b
      • Fig 6: Checking Passenger Air Bag Module Circuits For An Open Between Passenger Air Bag Module & RCM
      GF0044530Courtesy of FORD MOTOR CO.
    • Measure the resistance between RCM C310a-1, circuit 607 (LB/OG), harness side and passenger air bag module C256-2, circuit 607 (LB/OG), harness side; and between RCM C310a-2, circuit 616 (PK/BK), harness side and passenger air bag module C256-1, circuit 616 (PK/BK), harness side.
    • Are the resistances less than 0.5 ohm? 
    1. YES  : Go to  G27.
    2. NO  : REPAIR circuit 607 (LB/OG) or circuit 616 (PK/BK). Go to  G34.
  21. G21 CHECK THE PASSENGER AIR BAG MODULE CIRCUITS FOR A SHORT TO GROUND 
    NOTE: This pinpoint test step will attempt to change the fault reported by the RCM by inducing a different fault condition. If the fault reported changes, this indicates the RCM is functioning correctly and is not the source of the fault.
    • Key in OFF position.
    • Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Disconnect: Passenger Air Bag Module C256
    • Repower the SRS. Do not  prove out the SRS at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Enter the following diagnostic mode on the diagnostic tool: Self Test/Retrieve and Record On-Demand and Continuous Memory DTCs
    • Enter the following diagnostic mode on the diagnostic tool: DataLogger/View and Record the Following Fault PIDs
      • 2293_27_OD (Air Bag Circuit Short to Ground - Loop No. 1, Front Passenger Side)
      • 2293_25_OD (Air Bag Circuit Open - Loop No. 1, Front Passenger Side)
    • DIAGNOSTIC TIP:  When viewing DTC B2293 on-demand fault PIDs with the passenger air bag module disconnected, open circuit faults would normally be retrieved.
    • Did the passenger air bag module on-demand fault PIDs change from indicating a short to ground to an open circuit fault? 
    1. YES  : Go to  G25.
    2. NO  : Go to  G22.
  22. G22 CHECK CIRCUITS 607 (LB/OG) AND 616 (PK/BK) FOR A SHORT TO GROUND BETWEEN THE RCM AND PASSENGER AIR BAG MODULE 
    • Key in OFF position.
    • Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Disconnect: RCM C310a and C310b
      • Fig 7: Checking Circuits 607 (LB/OG) & 616 (PK/BK) For A Short To Ground Between RCM & Passenger Air Bag Module
      GF0016829Courtesy of FORD MOTOR CO.
    • Measure the resistance between passenger air bag module C256-1, circuit 607 (LB/OG), harness side and ground; and between passenger air bag module C256-2, circuit 616 (PK/BK), harness side and ground.
    • Are the resistances greater than 10,000 ohms? 
    1. YES  : Go to  G27.
    2. NO  : Due to the shorting bar feature in the RCM electrical connector, the fault can exist in either circuit. Do not remove or defeat the shorting bar.

      REPAIR circuit 607 (LB/OG) or circuit 616 (PK/BK). Go to  G34.

  23. G23 CHECK CIRCUITS 607 (LB/OG) AND 616 (PK/BK) FOR A SHORT TO VOLTAGE BETWEEN THE RCM AND PASSENGER AIR BAG MODULE 
    1. YES  : Go to  G27.
    2. NO  : Due to the shorting bar feature in the RCM electrical connector, the fault can exist in either circuit. Do not remove or defeat the shorting bar.

      REPAIR circuit 607 (LB/OG) or circuit 616 (PK/BK). Go to  G34.

  24. G24 CONFIRM THE DRIVER AIR BAG MODULE FAULT 
    NOTE: Make sure all restraint system components and the RCM electrical connectors are connected before carrying out the on-demand self test. If not, erroneous DTCs will be recorded.
    1. YES  : INSTALL a new driver air bag module. REFER to Driver Air Bag Module . Go to  G34.
    2. NO  : In the process of diagnosing the fault, the fault condition has become intermittent. Using the fault PIDs recorded, go to the appropriate pinpoint test step and CHECK for causes of the intermittent fault in the areas previously worked in, particularly the pins and terminals of any electrical connectors that were disconnected.

      For 2293_28_CM (Air Bag Inflator Circuit Resistance Low - Loop No. 1, Front Driver Side), go to  G28.

      For 2293_29_CM (Air Bag Circuit Open - Loop No. 1, Front Driver Side), go to  G28.

      For 2293_31_CM (Air Bag Circuit Short to Ground - Loop No. 1, Front Driver Side), go to  G29.

      For 2293_30_CM (Air Bag Circuit Short to Battery - Loop No. 1, Front Driver Side), go to  G31.

  25. G25 CONFIRM THE PASSENGER AIR BAG MODULE FAULT 
    NOTE: Make sure all restraint system components and the RCM electrical connectors are connected before carrying out the on-demand self test. If not, erroneous DTCs will be recorded.
    • Key in OFF position.
    • Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Connect: Passenger Air Bag Module C256 (if previously disconnected)
    • Repower the SRS. Do not  prove out the SRS at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Enter the following diagnostic mode on the diagnostic tool: Self Test/Retrieve and Record On-Demand and Continuous Memory DTCs
    • Enter the following diagnostic mode on the diagnostic tool: DataLogger/View and Record All B2293 Fault PIDs
      • Refer to PID list in Normal Operation to view B2293 fault PIDs.
    • Does the original on-demand DTC B2293 fault PID indicate a fault? 
    1. YES  : INSTALL a new passenger air bag module. REFER to Passenger Air Bag Module . Go to  G34.
    2. NO  : In the process of diagnosing the fault, the fault condition has become intermittent. Using the fault PIDs recorded, go to the appropriate pinpoint test step and CHECK for causes of the intermittent fault in the areas previously worked in, particularly the pins and terminals of any electrical connectors that were disconnected.

      For 2293_24_CM (Air Bag Inflator Circuit Resistance Low - Loop No. 1, Front Passenger Side), go to  G28.

      For 2293_25_CM (Air Bag Circuit Open - Loop No. 1, Front Passenger Side), go to  G28.

      For 2293_27_CM (Air Bag Circuit Short to Ground - Loop No. 1, Front Passenger Side), go to  G30.

      For 2293_26_CM (Air Bag Circuit Short to Battery - Loop No. 1, Front Passenger Side), go to  G32.

  26. G26 CONFIRM THE CLOCKSPRING FAULT 
    NOTE: Make sure all restraint system components and the RCM electrical connectors are connected before carrying out the on-demand self test. If not, erroneous DTCs will be recorded.
    1. YES  : INSTALL a new clockspring. REFER to Clockspring . Go to  G34.
    2. NO  : In the process of diagnosing the fault, the fault condition has become intermittent. Using the fault PIDs recorded, go to the appropriate pinpoint test step and CHECK for causes of the intermittent fault in the areas previously worked in, particularly the pins and terminals of any electrical connectors that were disconnected.

      For 2293_28_CM (Air Bag Inflator Circuit Resistance Low - Loop No. 1, Front Driver Side), go to  G28.

      For 2293_29_CM (Air Bag Circuit Open - Loop No. 1, Front Driver Side), go to  G28.

      For 2293_31_CM (Air Bag Circuit Short to Ground - Loop No. 1, Front Driver Side), go to  G29.

      For 2293_30_CM (Air Bag Circuit Short to Battery - Loop No. 1, Front Driver Side), go to  G31.

  27. G27 CONFIRM THE RCM FAULT 
    NOTE: Make sure all restraint system components and the RCM electrical connectors are connected before carrying out the on-demand self test. If not, erroneous DTCs will be recorded.
    • Key in OFF position.
    • Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • If previously removed, install the driver air bag module. Refer to Driver Air Bag Module .
    • Connect: Clockspring C218a (if previously disconnected)
    • Connect: Passenger Air Bag Module C256 (if previously disconnected)
    • Connect: RCM C310a and C310b (if previously disconnected)
    • Repower the SRS. Do not  prove out the SRS at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Enter the following diagnostic mode on the diagnostic tool: Self Test/Retrieve and Record On-Demand and Continuous Memory DTCs
    • Enter the following diagnostic mode on the diagnostic tool: DataLogger/View and Record All B2293 Fault PIDs
      • Refer to PID list in Normal Operation to view B2293 fault PIDs.
    • Does the original on-demand DTC B2293 fault PID indicate a fault? 
    1. YES  : INSTALL a new RCM and CARRY OUT programmable module installation (PMI). REFER to Restraints Control Module (RCM) . Go to  G34.
    2. NO  : In the process of diagnosing the fault, the fault condition has become intermittent. Using the fault PIDs recorded, go to the appropriate pinpoint test step and CHECK for causes of the intermittent fault in the areas previously worked in, particularly the pins and terminals of any electrical connectors that were disconnected.

      For 2293_28_CM (Air Bag Inflator Circuit Resistance Low - Loop No. 1, Front Driver Side), go to  G28.

      For 2293_29_CM (Air Bag Circuit Open - Loop No. 1, Front Driver Side), go to  G28.

      For 2293_31_CM (Air Bag Circuit Short to Ground - Loop No. 1, Front Driver Side), go to  G29.

      For 2293_30_CM (Air Bag Circuit Short to Battery - Loop No. 1, Front Driver Side), go to  G31.

      For 2293_24_CM (Air Bag Inflator Circuit Resistance Low - Loop No. 1, Front Passenger Side), go to  G28.

      For 2293_25_CM (Air Bag Circuit Open - Loop No. 1, Front Passenger Side), go to  G28.

      For 2293_27_CM (Air Bag Circuit Short to Ground - Loop No. 1, Front Passenger Side), go to  G30.

      For 2293_26_CM (Air Bag Circuit Short to Battery - Loop No. 1, Front Passenger Side), go to  G32.

  28. G28 CHECK THE DRIVER OR PASSENGER AIR BAG MODULE FOR AN INTERMITTENT LOW RESISTANCE OR OPEN CIRCUIT FAULT 
    • If the fault PID was reported for the driver air bag module, monitor the following on the scan tool:
      • D_ABAGR (driver air bag) resistance PID.
      • 2293_28_OD (Air Bag Inflator Circuit Resistance Low - Loop No. 1, Front Driver Side) fault PID.
      • 2293_29_OD (Air Bag Circuit Open - Loop No. 1, Front Driver Side) fault PID.
    • If the fault PID was reported for the passenger air bag module, monitor the following on the scan tool:
      • P_ABAGR (passenger air bag) resistance PID.
      • 2293_24_OD (Air Bag Inflator Circuit Resistance Low - Loop No. 1, Front Passenger Side) fault PID.
      • 2293_25_OD (Air Bag Circuit Open - Loop No. 1, Front Passenger Side) fault PID.
      • NOTE: A resistance PID that reads between 1.36 and 1.84 ohms for driver air bag and between 1.04 and 1.50 ohms for passenger air bag or between 3.96 and 4.70 ohms for driver air bag or between 3.04 and 3.72 ohms for the passenger air bag may or may not set an on-demand DTC yet indicates a strong potential of an intermittent fault condition. Make sure to thoroughly check wire harness(es), connectors and terminals as they are the likely source of the fault condition.
      NOTE: Do not remove the driver or passenger air bag module from its mounted position at this time.
    • With the driver or passenger air bag in its mounted position, attempt to recreate the fault by wiggling connectors (including any inline connectors), and flexing the wire harness, tilting and rotating the steering wheel frequently.
    • Does any driver or passenger air bag on-demand fault PID indicate a fault is present or is any air bag resistance PID less than 1.84 ohms for driver air bag and less than 1.50 ohms for passenger air bag or greater than 3.96 ohms for driver air bag and greater than 3.04 ohms for passenger air bag? 
    1. YES  : DEPOWER the SRS and REPAIR as necessary. Refer to SYSTEM WIRING DIAGRAMS - E350 SUPER DUTY , Connector Repair Procedures for schematic and connector information. Go to  G34.
    2. NO  : Go to  G33.
  29. G29 CHECK THE DRIVER AIR BAG MODULE CIRCUITS FOR AN INTERMITTENT SHORT TO GROUND FAULT 
    • Monitor the 2293_31_OD (Air Bag Circuit Short to Ground - Loop No. 1, Front Driver Side) fault PID.
    • DIAGNOSTIC TIP:  When monitoring fault PIDs with the scan tool, it may take up to 2 seconds for the scan tool display to update.
      • NOTE: Do not remove the driver air bag module from its mounted position at this time.
    • With the driver air bag in its mounted position, attempt to recreate the fault by wiggling connectors (including any inline connectors) and flexing the wire harness, tilting and rotating the steering wheel frequently.
    • Does any driver air bag module short to ground fault PID indicate a fault is present? 
    1. YES  : DEPOWER the SRS and REPAIR as necessary. Refer to SYSTEM WIRING DIAGRAMS - E350 SUPER DUTY , Connector Repair Procedures for schematic and connector information. Go to  G34.
    2. NO  : Go to  G33.
  30. G30 CHECK THE PASSENGER AIR BAG MODULE CIRCUITS FOR AN INTERMITTENT SHORT TO GROUND FAULT 
    NOTE: When monitoring fault and/or resistance PIDs with the scan tool, it may take up to 2 seconds for the scan tool display to update.
    • Key in ON position.
    • Monitor the 2293_27_OD (Air Bag Circuit Short to Ground - Loop No. 1, Front Passenger Side) fault PID.
      • NOTE: Do not remove the passenger air bag module from its mounted position at this time.
    • With the passenger air bag in its mounted position, attempt to recreate the fault by wiggling connectors (including any inline connectors) and flexing the wire harness.
    • Does the passenger air bag module short to ground fault PID indicate a fault is present? 
    1. YES  : DEPOWER the SRS and REPAIR as necessary. Refer to SYSTEM WIRING DIAGRAMS - E350 SUPER DUTY , Connector Repair Procedures for schematic and connector information. Go to  G34.
    2. NO  : Go to  G33.
  31. G31 CHECK THE DRIVER AIR BAG MODULE CIRCUITS FOR AN INTERMITTENT SHORT TO BATTERY FAULT 
    • Key in OFF position.
    • Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Remove the driver air bag module. Refer to Driver Air Bag Module .
    • Repower the SRS. Do not  prove out the SRS at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Key in ON position.
    • DIAGNOSTIC TIP:  When monitoring fault PIDs with the scan tool, it may take up to 2 seconds for the scan tool display to update.
    • Monitor the 2293_30_OD (Air Bag Circuit Short to Battery - Loop No. 1, Front Driver Side) fault PID.
    • Attempt to recreate the fault by wiggling connectors (including any inline connectors) and flexing the wire harness, tilting and rotating the steering wheel frequently.
    • Does the driver air bag module short to battery fault PID indicate a fault is present? 
    1. YES  : DEPOWER the SRS and REPAIR as necessary. Refer to SYSTEM WIRING DIAGRAMS - E350 SUPER DUTY , Connector Repair Procedures for schematic and connector information. Go to  G34.
    2. NO  : Go to  G33.
  32. G32 CHECK THE PASSENGER AIR BAG MODULE CIRCUITS FOR AN INTERMITTENT SHORT TO BATTERY FAULT 
    • Key in OFF position.
    • Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Disconnect: Passenger Air Bag Module C256
    • Repower the SRS. Do not  prove out the SRS at this time. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • Key in ON position.
    • DIAGNOSTIC TIP:  When monitoring fault PIDs with the scan tool, it may take up to 2 seconds for the scan tool display to update.
    • Monitor the 2293_26_OD (Air Bag Circuit Short to Battery - Loop No. 1, Front Passenger Side) fault PID.
      • NOTE: Do not remove the passenger air bag module from its mounted position at this time.
    • Attempt to recreate the fault by wiggling connectors (including any inline connectors) and flexing the wire harness.
    • Does the passenger air bag module short to battery fault PID indicate a fault is present? 
    1. YES  : DEPOWER the SRS and REPAIR as necessary. Refer to SYSTEM WIRING DIAGRAMS - E350 SUPER DUTY , Connector Repair Procedures for schematic and connector information. Go to  G34.
    2. NO  : Go to  G33.
  33. G33 CHECK THE HARNESS AND CONNECTORS 
    • Key in OFF position.
    • Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering .
    • If the fault PID was reported for the driver air bag:
      • remove the driver air bag module.
      • inspect connector(s) (including any inline connectors) for corrosion, loose or spread terminals and loose or frayed wire connections at terminals.
      • inspect wire harness for any damage, pinched, cut or pierced wires.
    • If the fault PID was reported for the passenger air bag:
      • disconnect the passenger air bag module C256.
      • inspect connector(s) (including any inline connectors) for corrosion, loose or spread terminals and loose or frayed wire connections at terminals.
      • inspect wire harness for any damage, pinched, cut or pierced wires.
    • Were any concerns found? 
    1. YES  : DEPOWER the SRS and REPAIR as necessary. Refer to SYSTEM WIRING DIAGRAMS - E350 SUPER DUTY , Connector Repair Procedures for schematic and connector information. Go to  G34.
    2. NO  : The fault is not present and cannot be recreated at this time. Do not install any new SRS components at this time. SRS components should only be installed when directed to do so in the pinpoint test.  Go to  G34.
  34. G34 CHECK FOR ADDITIONAL SRS DTCs 
    • Key in OFF position.
      WARNING: Turn the ignition OFF and wait one minute to deplete the backup power supply. Failure to follow this instruction may result in serious personal injury or death in the event of an accidental deployment.
    • Reconnect all SRS components (if previously disconnected).
    • Key in ON position.
    • Enter the following diagnostic mode on the diagnostic tool: Self Test/Retrieve and Record On-Demand and Continuous Memory DTCs
    • Enter the following diagnostic mode on the diagnostic tool: Clear all Continuous Memory DTCs
    • Enter the following diagnostic mode on the diagnostic tool: Self Test/RCM
    • Are any DTCs retrieved indicating a fault? 
    1. YES  : Do not clear any DTCs until all DTCs have been resolved. Go to Supplemental Restraint System (SRS) DTC Chart  for pinpoint test direction.
    2. NO  : PROVE OUT the SRS. REPAIR is complete. RETURN the vehicle to the customer.
scientia non olet · About LEMON Manuals