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Home >> Mercury >> 2008 >> Milan Base, 2.3 Z, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 1478 (Supplemental Restraint System) >> Diagnosis And Testing >> Air Bag and Safety Belt Pretensioner Supplemental Restraint System (SRS) >> Pinpoint Test - Supplemental Restraint System (SRS) >> Pinpoint Test G: DTCs B0020:11, B0020:12, B0020:13 and B0020:1A >> PINPOINT TEST G: DTCs B0020:11, B0020:12, B0020:13 AND B0020:1A

PINPOINT TEST G: DTCs B0020:11, B0020:12, B0020:13 AND B0020:1A

WARNING: This page is about a different car, the 2010 Mercury Milan, 2010 Lincoln MKZ, and 2010 Ford Fusion. However, it is still accessible from the selected car via links, so may be relevant.
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.
WARNING: Never disassemble or tamper with safety belt buckle/retractor pretensioners or adaptive load limiting retractors or probe the electrical connectors. Failure to follow this instruction may result in the accidental deployment of the safety belt pretensioners or adaptive load limiting retractors which increases the risk of serious personal injury or death.
NOTE: Use the correct probe adapter(s) from the Flex Probe Kit when taking measurements. Failure to use the correct probe adapter(s) may damage the connector.

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: Always make sure the correct SRS  component is being installed. Parts released for other vehicles may not be compatible even if they appear physically similar. Check the part number listed in the Ford Catalog Advantage™ to make sure the correct component is being installed. If an incorrect SRS  component is installed, DTCs may set.
NOTE: The SRS  must be fully operational and free of faults before releasing the vehicle to the customer.
  1. G1 RETRIEVE RCM DTCs 
    • Ignition ON.
    • Enter the following diagnostic mode on the scan tool: Self Test - RCM. 
    • Was DTC B0020:11, B0020:12, B0020:13 or B0020:1A retrieved on-demand during self-test? 
    • Yes  : This fault cannot be cleared until it is corrected and the DTC is no longer retrieved on-demand during self-test.

      For DTC B0020:13 or B0020:1A, GO to G2  .

      For DTC B0020:11, GO to  G8.

      For DTC B0020:12, GO to  G10.

    • No  : This is an intermittent fault when present as a Continuous Memory Diagnostic Trouble Code (CMDTC) only.

      For DTC B0020:13 or B0020:1A, GO to  G13.

      For DTC B0020:11, GO to  G14.

      For DTC B0020:12, GO to  G15.

  2. G2 CHECK THE LEFT SIDE AIRBAG DEPLOYMENT CONTROL RESISTANCE (DEPLOY_10_R) PID 
    • Enter the following diagnostic mode on the scan tool: DataLogger - RCM. 
      • DEPLOY_10_R PID
    • Does the PID value read between 1.7 and 2.78 ohms? 
    • Yes  : GO to  G12.
    • No  : GO to G3  .
  3. G3 CHECK THE LEFT SIDE AIRBAG DEPLOYMENT CONTROL RESISTANCE (DEPLOY_10_R) PID WHILE CARRYING OUT THE HARNESS TEST 
    • While monitoring the DEPLOY_10_R PID, carry out the harness test of the driver seat side air bag circuits and accessible connectors (including any in-line connectors) by wiggling connectors and flexing the wire harness frequently.
    • Does the PID value read between 1.7 and 2.78 ohms while carrying out the harness test? 
    • Yes  : DEPOWER the SRS  and REPAIR the connector, terminals or wire harness as needed.

      Refer to appropriate SYSTEM WIRING DIAGRAMS article for schematic and connector information.

      GO to  G17.

    • No  : For PID value less than 1.7 ohms, GO to G4  .

      For PID value greater than 2.78 ohms, GO to  G6.

  4. G4 CHECK THE LEFT SIDE AIRBAG DEPLOYMENT CONTROL DTC FOR A FAULT STATUS CHANGE (LOW RESISTANCE INDICATED) 
    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.
    • Yes  : GO to  G11.
    • No  : GO to G5  .
  5. G5 CHECK FOR A SHORT BETWEEN DRIVER SEAT SIDE AIR BAG CIRCUITS 
    • Ignition OFF.
    • Depower the SRS  . Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
    • Disconnect: RCM  C310A and C310B.
    • Measure the resistance between driver seat side air bag module C328-2, circuit CR105 (GN/BU), harness side and C328-1, circuit RR105 (GY/YE), harness side.
      Fig 1: Checking Short Between Driver Seat Side Air Bag Circuits
      G06063743Courtesy of FORD MOTOR CO.
    • Is the resistance greater than 10,000 ohms? 
    • Yes  : GO to  G12.
    • No  : REPAIR circuits CR105 (GN/BU) and RR105 (GY/YE). GO to  G17.
  6. G6 CHECK THE DRIVER SEAT SIDE AIR BAG CIRCUITS FOR AN OPEN 
    • Ignition OFF.
    • Depower the SRS  . Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
    • Disconnect: Driver Seat Side Air Bag Module C328.
    • Disconnect: RCM  C310A and C310B.
    • Measure the resistance between RCM  C310B, harness side and driver seat side air bag module C3138, harness side using the following chart.
      RCM REFERENCE CHART

      RCM  Circuit Driver Seat Side Air Bag Module
      C310B-6 CR105 (GN/BU) C328-2
      C310B-5 RR105 (GY/YE) C328-1
      Fig 2: Measuring Resistance Between RCM C310B And Driver Seat Side Air Bag Module C3138, Harness Side
      G06257507Courtesy of FORD MOTOR CO.
    • Are the resistances less than 0.5 ohm? 
    • Yes  : GO to G7  .
    • No  : REPAIR circuit CR105 (GN/BU) or RR105 (GY/YE). GO to  G17.
  7. G7 CHECK THE LEFT SIDE AIRBAG DEPLOYMENT CONTROL DTC FOR A FAULT STATUS CHANGE (OPEN INDICATED) 
    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.
    • Connect: RCM  C310A and C310B.
    • Connect a fused jumper wire between driver seat side air bag C328-2, circuit CR105 (GN/BU), harness side and C328-1, circuit RR105 (GY/YE), harness side.
    • Repower the SRS  . Do not  prove out the SRS  at this time. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
    • Ignition ON.
    • Enter the following diagnostic mode on the scan tool: Self Test - RCM. 
    • DIAGNOSTIC TIP:  When viewing DTCs with the driver seat side air bag module circuits shorted together, a low resistance fault would normally be retrieved.
    • Did the on-demand DTC change from B0020:13 to B0020:1A? 
    • Yes  : GO to  G11.
    • No  : GO to  G12.
  8. G8 CHECK THE LEFT SIDE AIRBAG DEPLOYMENT CONTROL DTC FOR A FAULT STATUS CHANGE (SHORT TO GROUND INDICATED) 
    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.
    • Yes  : GO to  G11.
    • No  : GO to G9  .
  9. G9 CHECK THE DRIVER SEAT SIDE AIR BAG CIRCUITS FOR A SHORT TO GROUND 
    • Ignition OFF.
    • Depower the SRS  . Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
    • Disconnect: RCM  C310A and C310B.
    • Measure the resistance between driver seat side air bag module:
      • C328-2, circuit CR105 (GN/BU), harness side and ground.
      • C328-1, circuit RR105 (GY/YE), harness side and ground.
      Fig 3: Checking Driver Seat Side Air Bag Circuits For Short To Ground
      G06078408Courtesy of FORD MOTOR CO.
    • Are the resistances greater than 10,000 ohms? 
    • Yes  : GO to  G12.
    • No  : REPAIR circuit CR105 (GN/BU) or RR105 (GY/YE). GO to  G17.
  10. G10 CHECK THE DRIVER SEAT SIDE AIR BAG CIRCUITS FOR A SHORT TO VOLTAGE 
    • Ignition OFF.
    • Depower the SRS  . Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
    • Disconnect: Driver Seat Side Air Bag Module C328.
    • 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 .
    • Ignition ON.
    • Measure the voltage between driver seat side air bag module:
      • C328-2, circuit CR105 (GN/BU), harness side and ground.
      • C328-1, circuit RR105 (GY/YE), harness side and ground.
      Fig 4: Checking Driver Seat Side Air Bag Circuits For Short To Voltage
      G06063742Courtesy of FORD MOTOR CO.
    • Is voltage present on either circuit? 
    • Yes  : REPAIR circuit CR105 (GN/BU) or RR105 (GY/YE). GO to  G17.
    • No  : GO to  G12.
  11. G11 CONFIRM THE DRIVER SEAT SIDE AIR BAG MODULE FAULT 
    NOTE: Make sure all restraint system components and the RCM  electrical connectors are connected before carrying out self-test. If not, DTCs will be recorded.
    • Yes  : REMOVE and INSPECT the driver seat side air bag module harness for damage. REFER to SIDE AIR BAG MODULE . If a concern is found, REPAIR as necessary.

      If a concern was not  found, INSTALL a new driver seat side air bag module. REFER to SIDE AIR BAG MODULE . GO to  G17.

    • No  : In the process of diagnosing the fault, the fault condition has become intermittent. 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. 

      For DTC B0020:13 or B0020:1A, GO to  G13.

      For DTC B0020:11, GO to  G14.

      For DTC B0020:12, GO to  G15.

  12. G12 CONFIRM THE RCM FAULT 
    NOTE: Make sure all restraint system components and the RCM  electrical connectors are connected before carrying out the self-test. If not, DTCs will be recorded.
    • Ignition OFF.
    • Depower the SRS  . Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
    • If previously installed, remove the fused jumper wire from the driver seat side air bag C3138.
    • Prior to reconnecting any previously disconnected SRS  component:
      • inspect connector(s) (including any in-line connectors) for pushed-out, loose or spread terminals and loose or frayed wire connections at terminals.
      • inspect wire harness for any damage, pinched, cut or pierced wires.
      • inspect RCM  C310A and C310B Connector Position Assurance (CPA) lever/lock for correct operation. Refer to RESTRAINTS CONTROL MODULE (RCM) .
      • repair any concerns found.

        Refer to appropriate SYSTEM WIRING DIAGRAMS article for schematic and connector information.

    • Connect: Driver Seat Side Air Bag Module C328 (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 .
    • Ignition ON.
    • Enter the following diagnostic mode on the scan tool: Self Test - RCM. 
    • Was the original DTC retrieved on-demand during self-test? 
    • Yes  : INSTALL a new RCM  . REFER to RESTRAINTS CONTROL MODULE (RCM) . GO to  G17.
    • No  : In the process of diagnosing the fault, the fault condition has become intermittent. 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. 

      For DTC B0020:13 or B0020:1A, GO to G13  .

      For DTC B0020:11, GO to  G14.

      For DTC B0020:12, GO to  G15.

  13. G13 CHECK THE LEFT SIDE AIRBAG DEPLOYMENT CONTROL RESISTANCE (DEPLOY_10_R) PID FOR AN INTERMITTENT LOW RESISTANCE OR OPEN CIRCUIT FAULT 
    • Enter the following diagnostic mode on the scan tool: DataLogger - RCM. 
      • DEPLOY_10_R PID
    • Attempt to recreate the fault by wiggling connectors (including any inline connectors) and flexing the wire harness frequently.
    • Does the PID value read between 1.7 and 2.78 ohms? 
    • Yes  : 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  G16.
    • No  : DEPOWER the SRS  and REPAIR as necessary.

      Refer to appropriate SYSTEM WIRING DIAGRAMS article for schematic and connector information.

      GO to  G17.

  14. G14 CHECK THE LEFT SIDE AIRBAG DEPLOYMENT CONTROL FOR AN INTERMITTENT SHORT TO GROUND FAULT 
    • Attempt to recreate the fault by wiggling connectors (including any inline connectors) and flexing the wire harness frequently.
    • Enter the following diagnostic mode on the scan tool: Self Test - RCM. 
    • Was DTC B0020:11 retrieved on-demand during self-test? 
    • Yes  : DEPOWER the SRS  and REPAIR as necessary.

      Refer to appropriate SYSTEM WIRING DIAGRAMS article for schematic and connector information.

      GO to  G17.

    • 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  G16.
  15. G15 CHECK THE LEFT SIDE AIRBAG DEPLOYMENT CONTROL FOR AN INTERMITTENT SHORT TO BATTERY FAULT 
    • Yes  : DEPOWER the SRS  and REPAIR as necessary.

      Refer to appropriate SYSTEM WIRING DIAGRAMS article for schematic and connector information.

      GO to  G17.

    • 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 G16  .
  16. G16 CHECK THE HARNESS AND CONNECTORS 
    • Ignition OFF.
    • Depower the SRS  . Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
    • Disconnect the driver seat side air bag module C328:
      • inspect connector(s) (including any in-line 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.
      • inspect RCM  C310A and C310B CPA lever/lock for correct operation. Refer to RESTRAINTS CONTROL MODULE (RCM) .
    • Were any concerns found? 
    • Yes  : REPAIR as necessary.

      Refer to appropriate SYSTEM WIRING DIAGRAMS article for schematic and connector information.

      GO to G17  .

    • 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 G17  .
  17. G17 CHECK FOR ADDITIONAL SRS DTCs 
    • Ignition OFF.
    • 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).
    • If previously directed to depower the SRS  , repower the SRS  . Do not  prove out the SRS  at this time. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
    • Ignition ON.
    • Enter the following diagnostic mode on the scan tool: Self Test - Restraints.
    • NOTE: When selecting Restraints from the Self Test menu, DTCs will be retrieved from the RCM  and OCSM  .
    • Are any RCM  and/or OCSM DTCs retrieved on-demand during self-test? 
    • Yes  : Do not clear any DTCs until all DTCs have been resolved. GO to the DTC CHARTS  for pinpoint test direction.
    • No  : CLEAR all RCM  and OCSM CMDTCs  . PROVE OUT the SRS  . Repair is complete. RETURN the vehicle to the customer.
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