Pinpoint Test I: LFC 24 And 25/DTC B2294 - Restraint System - Curtain Fault

WARNING: This page is about a different car, the 2005 Mercury Mountaineer and 2005 Ford Explorer. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Most faults are due to connector and/or wiring concerns. Carry out a thorough Inspection and Verification before proceeding with the Pinpoint Test.

I1 CHECK FOR A HARD OR INTERMITTENT DTC
WARNING: Restraint system diagnostic tools are for service only. Tools must be removed prior to operating the vehicle over the road. Failure to remove restraint system diagnostic tools could result in injury and possible violation of vehicle safety standards.

WARNING: Do not handle, move or change the original horizontal mounting position of the restraints control module (RCM) while the RCM is connected and the ignition switch is ON. Failure to follow these instructions may result in the inadvertent deployment of the safety canopy and risk of personal injury.

WARNING: Never probe the connectors on the air bag module. Doing so can result in air bag deployment, which can result in personal injury.

WARNING: The safety belt pretensioner is a pyrotechnic device. Always wear safety glasses when repairing an air bag equipped vehicle and when handling a safety belt buckle pretensioner or safety belt retractor pretensioner. Never probe a pretensioner electrical connector. Doing so could result in pretensioner or air bag deployment and could result in personal injury.

WARNING: Never probe the electrical connector on a safety canopy module. Doing so can result in safety canopy deployment.

NOTE: After diagnosing or repairing a supplemental restraint system (SRS), the restraint system diagnostic tools must be removed before operating the vehicle over the road.

NOTE: The SRS must be fully operational and free of faults before releasing the vehicle to the customer.
- Enter the following diagnostic mode on the diagnostic tool: Retrieve Continuous DTCs.
- Enter the following diagnostic mode on the diagnostic tool: On-Demand Self Test.
- Enter the following diagnostic mode on the diagnostic tool: Flag B2294.
- Was DTC B2294 retrieved during the on-demand self test?
- Yes; For vehicles with safety canopy modules: 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. GO to I3.
  For vehicles without safety canopy modules: 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. GO to I2.
- No : This is an intermittent fault. The fault condition is not present at this time. GO to I17.
I2 CHECK THE SAFETY CANOPY MODULE BRIDGE RESISTOR
- Key in OFF position.
- Depower the system. refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
- Disconnect: LH Safety Canopy Bridge Resistor.
- Install a known good safety canopy bridge resistor.
- Repower the system. Do not prove out the system at this time. refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
- Enter the following diagnostic mode on the diagnostic tool: On-Demand Self Test.
- Enter the following diagnostic mode on the diagnostic tool: Flag DTC B2294.
- Was DTC B2294 retrieved during the on-demand self test?
- Yes : Using the flagged faults recorded in Step I1, GO to the appropriate PINPOINT TEST step.
  If a flagged fault of "?" was recorded in Step I1, multiple faults exist and the entire pinpoint test must be carried out.
  
  For driver safety canopy module (DFCURTN) with a short to battery (STB) fault, GO to I4.
  
  For driver safety canopy module (DFCURTN) with a short to ground (STG) fault, GO to I5.
  
  For driver safety canopy module (DFCURTN) with an open circuit (O_CIR) fault, GO to I5.
  
  For driver safety canopy module (DFCURTN) with a low resistance (LOWRES) fault, GO to I8.
- No : Fault corrected. GO to I18.
I3 CHECK THE DRIVER AND PASSENGER SAFETY CANOPY MODULES
- Key in OFF position.
- Depower the system. refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
- If the flagged fault was reported for the driver safety canopy module:
  - Disconnect the driver safety canopy C3213.
  - Connect restraint system tool 418-F088 to the driver safety canopy module C3213.
- If the flagged fault was reported for the passenger safety canopy module:
  - Disconnect the passenger safety canopy C3214.
  - Connect restraint system tool 418-F088 to the passenger safety canopy module C3214.
- Repower the system. Do not prove out the system at this time. refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
- Enter the following diagnostic mode on the diagnostic tool: On-Demand Self Test.
- Enter the following diagnostic mode on the diagnostic tool: Flag DTC B2294.
- Was DTC B2294 retrieved during the on-demand self test?
- Yes : Using the flagged faults recorded in Step I1, GO to the appropriate PINPOINT TEST step.
  If a flagged fault of "?" was recorded in Step I1, multiple faults exist and the entire pinpoint test must be carried out.
  
  For driver safety canopy module (DFCURTN) with a short to battery (STB) fault, GO to I4.
  
  For driver safety canopy module (DFCURTN) with a short to ground (STG) fault, GO to I5.
  
  For driver safety canopy module (DFCURTN) with an open circuit (O_CIR) fault, GO to I6.
  
  For driver safety canopy module (DFCURTN) with a low resistance (LOWRES) fault, GO to I8.
  
  For passenger safety canopy module (PFCURTN) with a short to battery (STB) fault, GO to I10.
  
  For passenger safety canopy module (PFCURTN) with a short to ground (STG) fault, GO to I11.
  
  For passenger safety canopy module (PFCURTN) with an open circuit (O_CIR) fault, GO to I12.
  
  For passenger safety canopy module (PFCURTN) with a low resistance (LOWRES) fault, GO to I14.
- No : If a flagged fault of "?" was recorded in Step I1, multiple faults exist and the entire pinpoint test must be carried out.
  If a fault was flagged against driver safety canopy module in Step I1, INSTALL a new driver safety canopy module. REFER to SAFETY CANOPY MODULE . GO to I18.
  
  If a fault was flagged against passenger safety canopy module in Step I1, INSTALL a new passenger safety canopy module. REFER to SAFETY CANOPY MODULE . GO to I18.
I4 CHECK CIRCUIT 1257 (WH/LB) AND CIRCUIT 1258 (RD) FOR A SHORT TO BATTERY BETWEEN THE RCM AND THE DRIVER SAFETY CANOPY MODULE
- Key in OFF position.
- Deactivate the system. refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEACTIVATION AND REACTIVATION .
- Disconnect: Driver Side Safety Canopy Module Restraint System Diagnostic Tool (with Safety Canopy).
- Disconnect: LH Side Safety Canopy Bridge Resistor (without Safety Canopy).
- Disconnect: RCM C310b.
- Key in ON position.
- Measure the voltage between RCM C310b pin 3, circuit 1257 (WH/LB), harness side and ground; and between RCM C310b pin 4, circuit 1258 (RD), harness side and ground.
  
  Fig 1: Measuring Voltage Between RCM C310b Pin 3 Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Are the voltages less than 0.2 volt?
- Yes : GO to I16.
- No : Due to the shorting bar feature in the electrical connector, the fault can exist in either circuit. REPAIR circuit 1257 (WH/LB) or circuit 1258 (RD). GO to I18.
I5 CHECK CIRCUIT 1257 (WH/LB) AND CIRCUIT 1258 (RD) FOR A SHORT TO GROUND BETWEEN THE RCM AND THE DRIVER SAFETY CANOPY MODULE
- Key in OFF position.
- Depower the system. refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
- Disconnect: Driver Safety Canopy Module Restraint System Diagnostic Tool (with Safety Canopy).
- Disconnect: LH Side Safety Canopy Bridge Resistor (without Safety Canopy).
- Disconnect: RCM C310b.
- Measure the resistance between RCM C310b pin 3, circuit 1257 (WH/LB), harness side and ground; and between RCM C310b pin 4, circuit 1258 (RD), harness side and ground.
  
  Fig 2: Measuring Resistance Between RCM C310b Pin 3 Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance greater than 1,000,000 ohms?
- Yes : GO to I16.
- No : Due to the shorting bar feature in the electrical connector, the fault can exist in either circuit. REPAIR circuit 1257 (WH/LB) or circuit 1258 (RD). GO to I18.
I6 CHECK CIRCUIT 1257 (WH/LB) FOR AN OPEN BETWEEN THE RCM AND THE DRIVER SAFETY CANOPY MODULE
- Key in OFF position.
- Depower the system. refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
- Disconnect: Driver Safety Canopy Module Restraint System Diagnostic Tool (with Safety Canopy).
- Disconnect: LH Safety Canopy Module Bridge Resistor (without Safety Canopy).
- Disconnect: RCM C310b.
- For vehicles with safety canopies , measure the resistance between RCM C310b pin 3, circuit 1257 (WH/LB), harness side and driver safety canopy module C3213 pin 1, circuit 1257 (WH/LB), harness side.
  
  Fig 3: Measuring Resistance Between RCM C310B Pin 3, Circuit 1257 (WH/LB), Harness Side And Driver Safety Canopy Module C3213 Pin 1, Circuit 1257 (WH/LB), Harness Side
  Courtesy of FORD MOTOR CO.
- For vehicles without safety canopies , measure the resistance between RCM C310b pin 3, circuit 1257 (WH/LB), harness side and LH safety canopy bridge resistor C3024 pin 2, circuit 1257 (WH/LB), harness side.
  
  Fig 4: Measuring Resistance Between RCM C310B Pin 3, Circuit 1257 (WH/LB), Harness Side And LH Safety Canopy Bridge Resistor C3024 Pin 2, Circuit 1257 (WH/LB), Harness Side
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 0.5 ohm?
- Yes : GO to I7.
- No : REPAIR circuit 1257 (WH/LB). GO to I18.
I7 CHECK CIRCUIT 1258 (RD) FOR AN OPEN BETWEEN THE RCM AND THE DRIVER SAFETY CANOPY MODULE
- For vehicles with safety canopies , measure the resistance between RCM C310b pin 4, circuit 1258 (RD), harness side and driver safety canopy module C3213 pin 3, circuit 1258 (RD), harness side.
  
  Fig 5: Measuring Resistance Between RCM C310B Pin 4, Circuit 1258 (RD), Harness Side And Driver Safety Canopy Module C3213 Pin 3, Circuit 1258 (RD), Harness Side
  Courtesy of FORD MOTOR CO.
- For vehicles without safety canopies , measure the resistance between RCM C310b pin 4, circuit 1258 (RD), harness side and LH safety canopy bridge resistor C3024 pin 1, circuit 1258 (RD), harness side.
  
  Fig 6: Measuring Resistance Between C310B Pin 4, Circuit 1258 (RD), Harness Side And LH Safety Canopy Bridge Resistor C3024 Pin 1, Circuit 1258 (RD), Harness Side
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 0.5 ohm?
- Yes : GO to I16.
- No : REPAIR circuit 1258 (RD). GO to I18.
I8 CHECK FOR LOW RESISTANCE ON CIRCUIT 1257 (WH/LB) AND CIRCUIT 1258 (RD) BETWEEN THE DRIVER SAFETY CANOPY MODULE AND THE RCM
- Key in OFF position.
- Depower the system. refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
- Disconnect: Driver Safety Canopy Module Restraint System Diagnostic Tool (with Safety Canopy).
- Disconnect: LH Side Safety Canopy Bridge Resistor (without Safety Canopy).
- For vehicles with safety canopies , measure the resistance between driver side air curtain module C3213, circuit 1257 (WH/LB) and 1258 (RD), harness side.
  
  Fig 7: Measuring Resistance Between Connector Terminals
  Courtesy of FORD MOTOR CO.
- For vehicles without safety canopies , measure the resistance between LH safety canopy bridge resistor C3024, circuit 1257 (WH/LB) and circuit 1258 (RD), harness side.
  
  Fig 8: Measuring Resistance Between Air Bag Connector Terminals
  Courtesy of FORD MOTOR CO.
- Is the resistance greater than 10,000 ohms?
- Yes : GO to I16.
- No : GO to I9.
I9 MEASURE THE RESISTANCE BETWEEN RCM CIRCUIT 1257 (WH/LB) AND CIRCUIT 1258 (RD)
- Disconnect: RCM C310b.
- Measure the resistance between RCM C310b pin 3, circuit 1257 (WH/LB), and pin 4, circuit 1258 (RD), component side.
  
  Fig 9: Measuring Resistance Between RCM Connector Terminals
  Courtesy of FORD MOTOR CO.
- Is the resistance greater than 10,000 ohms?
- Yes : REPAIR circuit 1257 (WH/LB) and circuit 1258 (RD). GO to I18.
- No : GO to I16.
I10 CHECK CIRCUIT 1259 (WH/YE) AND CIRCUIT 1260 (BN/YE) FOR A SHORT TO BATTERY BETWEEN THE RCM AND THE PASSENGER SAFETY CANOPY MODULE
- Key in OFF position.
- Deactivate the system. refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEACTIVATION AND REACTIVATION .
- Disconnect: Passenger Safety Canopy Restraint System Diagnostic Tool.
- Disconnect: RCM C310b.
- Key in ON position.
- Measure the voltage between RCM C310b pin 5, circuit 1259 (WH/YE), harness side and ground; and between RCM C310b pin 6, circuit 1260 (BN/YE), harness side and ground.
  
  Fig 10: Checking Circuit 1259 (WH/YE) And Circuit 1260 (BN/YE) For A Short To Battery Between RCM And Passenger Safety Canopy Module
  Courtesy of FORD MOTOR CO.
- Are the voltages less than 0.2 volt?
- Yes : GO to I16.
- No : Due to the shorting bar feature in the electrical connector, the fault can exist in either circuit. REPAIR circuit 1259 (WH/YE) or circuit 1260 (BN/YE). GO to I18.
I11 CHECK CIRCUIT 1259 (WH/YE) AND CIRCUIT 1260 (BN/YE) FOR A SHORT TO GROUND BETWEEN THE RCM AND THE PASSENGER SAFETY CANOPY MODULE
- Key in OFF position.
- Depower the system. refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
- Disconnect: Passenger Safety Canopy Module Restraint System Diagnostic Tool.
- Disconnect: RCM C310b.
- Measure the resistance between RCM C310b pin 5, circuit 1259 (WH/YE), harness side and ground; and between RCM C310b pin 6, circuit 1260 (BN/YE), harness side and ground.
  
  Fig 11: Measuring Resistance Between RCM C310b Pin 5 Harness Side And Ground
  Courtesy of FORD MOTOR CO.
- Is the resistance greater than 1,000,000 ohms?
- Yes : GO to I16.
- No : Due to the shorting bar feature in the electrical connector, the fault can exist in either circuit. REPAIR circuit 1259 (WH/YE) or circuit 1260 (BN/YE). GO to I18.
I12 CHECK CIRCUIT 1259 (WH/YE) FOR AN OPEN BETWEEN THE RCM AND THE PASSENGER SAFETY CANOPY MODULE
- Key in OFF position.
- Depower the system. refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
- Disconnect: Passenger Safety Canopy Module Restraint System Diagnostic Tool.
- Disconnect: RCM C310b.
- Measure the resistance between RCM C310b pin 5, circuit 1259 (WH/YE), harness side and passenger safety canopy module C3214 pin 1, circuit 1259 (WH/YE), harness side.
  
  Fig 12: Checking Circuit 1259 (WH/YE) For An Open Between The RCM And The Passenger Safety Canopy Module
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 0.5 ohm?
- Yes : GO to I13.
- No : REPAIR circuit 1259 (WH/YE). GO to I18.
I13 CHECK CIRCUIT 1260 (BN/YE) FOR AN OPEN BETWEEN THE RCM AND THE PASSENGER SAFETY CANOPY MODULE
- Measure the resistance between RCM C310b pin 6, circuit 1260 (BN/YE), harness side and passenger safety canopy module C3214 pin 3, circuit 1260 (BN/YE), harness side.
  
  Fig 13: Checking Circuit 1260 (BN/YE) For An Open Between The RCM And The Passenger Safety Canopy Module
  Courtesy of FORD MOTOR CO.
- Is the resistance less than 0.5 ohm?
- Yes : GO to I14.
- No : REPAIR circuit 1260 (BN/YE). GO to I18.
I14 CHECK FOR LOW RESISTANCE ON CIRCUIT 1259 (WH/YE) AND CIRCUIT 1260 (BN/YE) BETWEEN THE PASSENGER SAFETY CANOPY MODULE AND THE RCM
- Key in OFF position.
- Depower the system. refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
- Disconnect: Passenger Safety Canopy Module Restraint System Diagnostic Tool.
- Measure the resistance between passenger safety canopy module C3214 pin 1, circuit 1259 (WH/YE), and pin 3, circuit 1260 (BN/YE), harness side.
  
  Fig 14: Measuring Resistance Between Connector Terminals
  Courtesy of FORD MOTOR CO.
- Is the resistance greater than 10,000 ohms?
- Yes : GO to I16.
- No : GO to I15.
I15 MEASURE THE RESISTANCE BETWEEN RCM CIRCUIT 1259 (WH/YE) AND CIRCUIT 1260 (BN/YE)
- Disconnect: RCM C310b.
- Measure the resistance between RCM C310b pin 5, circuit 1259 (WH/YE), and pin 6, circuit 1260 (BN/YE), component side.
  
  Fig 15: Measuring Resistance Between RCM Connector Terminals
  Courtesy of FORD MOTOR CO.
- Is the resistance greater than 10,000 ohms?
- Yes : REPAIR circuit 1259 (WH/YE) and circuit 1260 (BN/YE). GO to I18.
- No : GO to I16.
I16 CONFIRM THE RCM FAULT
NOTE: Make sure all restraint system diagnostic tools, sensor electrical connectors and the RCM electrical connector are connected before carrying out the on-demand self test. If not, erroneous DTCs will be recorded.
- Key in OFF position.
- Connect: Restraint System Diagnostic Tools (with Safety Canopy).
- Connect: LH Side Safety Canopy Bridge Resistor C3024 (without Safety Canopy).
- Connect: RCM C310b.
- Repower the system. Do not prove out the system at this time. refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
- Enter the following diagnostic mode on the diagnostic tool: On-Demand Self Test.
- Was DTC B2294 retrieved during the on-demand self test?
- Yes : If a "?" was flagged by the scan tool, CARRY OUT the entire pinpoint test.
  INSTALL a new RCM. REFER to RESTRAINTS CONTROL MODULE (RCM) . GO to I18.
- No : CHECK for causes of the intermittent fault. ATTEMPT to recreate the hard fault by flexing the wire harness and cycling the ignition key frequently. REPAIR any intermittent concerns found. GO to I18.
I17 CHECK FOR AN INTERMITTENT FAULT
- Key in OFF position.
- Depower the system. refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
- If the flagged fault was reported for the driver safety canopy module:
  - Disconnect the driver safety canopy C3213.
  - Connect restraint system tool 418-F088 to the driver safety canopy module C3213.
- If the flagged fault was reported for the passenger safety canopy module:
  - Disconnect the passenger safety canopy C3214.
  - Connect restraint system tool 418-F088 to the passenger safety canopy module C3214.
- Repower the system. Do not prove out the system at this time. refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
- Enter the following diagnostic mode on the diagnostic tool: On-Demand Self Test.
- Enter the following diagnostic mode on the diagnostic tool: Flag DTC B2294.
- Was DTC B2294 retrieved during the on-demand self test?
- Yes : CHECK for causes of the intermittent fault at or near the affected safety canopy module connector. REPAIR any intermittent concerns found.
  If an intermittent concern was found and repaired, GO to I18.
  
  If an intermittent concern was not found and repaired, USE the flagged faults recorded and GO to the appropriate PINPOINT TEST step.
  
  If a flagged fault of "?" was recorded in Step I1, multiple faults exist and the entire pinpoint test must be carried out.
  
  For driver safety canopy module (DFCURTN) with a short to battery (STB) fault, GO to I4.
  
  For driver safety canopy module (DFCURTN) with a short to ground (STG) fault, GO to I5.
  
  For driver safety canopy module (DFCURTN) with an open circuit (O_CIR) fault, GO to I6.
  
  For driver safety canopy module (DFCURTN) with a low resistance (LOWRES) fault, GO to I8.
  
  For passenger safety canopy module (PFCURTN) with a short to battery (STB) fault, GO to I10.
  
  For passenger safety canopy module (PFCURTN) with a short to ground (STG) fault, GO to I11.
  
  For passenger safety canopy module (PFCURTN) with an open circuit (O_CIR) fault, GO to I12.
  
  For passenger safety canopy module (PFCURTN) with a low resistance (LOWRES) fault, GO to I14.
- No : CHECK for causes of the intermittent fault. ATTEMPT to recreate the hard fault by flexing the wire harness and cycling the ignition key frequently. REPAIR any intermittent concerns found. GO to I18.
I18 CHECK FOR ADDITIONAL DTCs
- Refer to the continuous DTCs recorded during Step I1.
- Were any continuous DTCs retrieved during Step I1 ?
- Yes : Do not clear any DTCs until all DTCs have been resolved. GO to the RESTRAINTS CONTROL MODULE (RCM) DIAGNOSTIC TROUBLE CODE (DTC) TABLE for pinpoint test direction.
- No : RECONNECT the system. If previously directed to deactivate the system, REACTIVATE the system. refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEACTIVATION AND REACTIVATION . REPOWER the system. refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING . PROVE OUT the system. CLEAR all DTCs.