Pinpoint Test U: LFC 22 or 23 DTC B2295 - Restraint System - Side Air Bag Fault: Testing
- U1 CHECK FOR ON-DEMAND AND CONTINUOUS DTCs 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: If a seat equipped with a supplemental restraint system (SRS) component is being serviced, the SRS must be depowered.NOTE: After diagnosing or repairing an 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 scan tool: Retrieve/Record On-Demand DTCs.
- Enter the following diagnostic mode on the scan tool: DTC B2295/Record All Flagged Faults.
- Enter the following diagnostic mode on the scan tool: Retrieve/Record/Flag Continuous DTCs.
- Was DTC B2295 retrieved during the on-demand self test?
- Yes : Vehicles with seat side air bag 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 U3.
Vehicles without seat side air bag 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 U2.
- No : This is an intermittent fault. The fault condition is not present at this time. GO to U17.
- U2 CHECK THE SEAT SIDE AIR BAG MODULE BRIDGE RESISTORS
- Key in OFF position.
- Depower the system. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
- Disconnect: Driver and Passenger Seat Side Air Bag Bridge Resistors.
- Transfer the driver seat side air bag bridge resistor to the passenger side and the passenger seat side air bag bridge resistor to the driver side.
- 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 scan tool: On-Demand Self Test.
- Enter the following diagnostic mode on the scan tool: Flag DTC B2294/Record All Flagged Faults.
- Did the flagged fault transfer between the driver side (DFSIDE) and the passenger side (PFSIDE)?
- Yes : INSTALL a new seat side air bag bridge resistor. GO to U18.
- No
: Using the flagged faults recorded in Step U1, GO to the appropriate PINPOINT TEST .
If a flagged fault of "? " was recorded in Step U1, multiple faults exist and the entire pinpoint test must be carried out.
For driver seat side air bag module (DFSIDE) with a short to battery (STB) fault, GO to U4.
For driver seat side air bag module (DFSIDE) with a short to ground (STG) fault, GO to U5.
For driver seat side air bag module (DFSIDE) with an open circuit (O_CIR) fault, GO to U6.
For driver seat side air bag module (DFSIDE) with a low resistance (LOWRES) fault, GO to U8.
For passenger seat side air bag module (PFSIDE) with a short to battery (STB) fault, GO to U10.
For passenger seat side air bag module (PFSIDE) with a short to ground (STG) fault, GO to U11.
For passenger seat side air bag module (PFSIDE) with an open circuit (O_CIR) fault, GO to U12.
For passenger seat side air bag module (PFSIDE) with a low resistance (LOWRES) fault, GO to U14.
- U3 CHECK THE DRIVER AND PASSENGER SEAT SIDE AIR BAG 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 seat side air bag module:
- Disconnect the driver seat side air bag module C3226.
- Connect restraint system diagnostic tool 418-133 to driver seat side air bag module C3226.
- If the flagged fault was flagged for the passenger seat side air bag module:
- Disconnect the passenger seat side air bag module C3227.
- Connect restraint system diagnostic tool 418-133 to passenger seat side air bag module C3227.
- 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 scan tool: On-Demand Self Test.
- Enter the following diagnostic mode on the scan tool: Flag DTC B2295/Record All Flagged Faults.
- Was DTC B2295 retrieved during the on-demand self test?
- Yes
: Using the flagged faults recorded in Step U1, GO to the appropriate PINPOINT TEST .
If a flagged fault of "? " was recorded in Step U1, multiple faults exist and the entire pinpoint test must be carried out.
For driver seat side air bag module (DFSIDE) with a short to battery (STB) fault, GO to U4.
For driver seat side air bag module (DFSIDE) with a short to ground (STG) fault, GO to U5.
For driver seat side air bag module (DFSIDE) with an open circuit (O_CIR) fault, GO to U6.
For driver seat side air bag module (DFSIDE) with a low resistance (LOWRES) fault, GO to U8.
For passenger seat side air bag module (PFSIDE) with a short to battery (STB) fault, GO to U10.
For passenger seat side air bag module (PFSIDE) with a short to ground (STG) fault, GO to U11.
For passenger seat side air bag module (PFSIDE) with an open circuit (O_CIR) fault, GO to U12.
For passenger seat side air bag module (PFSIDE) with a low resistance (LOWRES) fault, GO to U14.
- No
: If a fault was flagged against the driver seat side air bag module in Step U1, INSTALL a new driver seat side air bag module. REFER to SIDE AIR BAG MODULE . GO to U18.
If a fault was flagged against the passenger seat side air bag module in Step U1, INSTALL a new passenger seat side air bag module. REFER to SIDE AIR BAG MODULE . GO to U18.
- U4 CHECK CIRCUITS 1257 (WH/LB) AND 1258 (RD) FOR A SHORT TO BATTERY BETWEEN THE RCM AND THE DRIVER SEAT SIDE AIR BAG MODULE
- Key in OFF position.
- Depower the system. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
- Disconnect: Driver Seat Side Air Bag Module Restraint System Diagnostic Tool (Vehicles With Seat Side Air Bags).
- Disconnect: Driver Seat Side Air Bag Bridge Resistor C3226 (Vehicles Without Seat Side Air Bags).
- Disconnect: RCM C310a and C310b.
- Key in ON position.
- Measure the voltage between driver seat side air bag module C3226 pin 1, circuit 1257 (WH/LB), harness side and ground; and between driver seat side air bag module C3226 pin 2, circuit 1258 (RD), harness side and ground.
- Are the voltages less than 0.2 volt?
- U5 CHECK CIRCUITS 1257 (WH/LB) AND 1258 (RD) FOR A SHORT TO GROUND BETWEEN THE RCM AND THE DRIVER SEAT SIDE AIR BAG MODULE
- Key in OFF position.
- Depower the system. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
- Disconnect: Driver Seat Side Air Bag Module Restraint System Diagnostic Tool (Vehicles With Seat Side Air Bags).
- Disconnect: Driver Seat Side Air Bag Bridge Resistor (Vehicles Without Seat Side Air Bags).
- Disconnect: RCM C310a and C310b.
- Measure the resistance between RCM C310b pin 1, circuit 1257 (WH/LB), harness side and ground; and between RCM C310b pin 2, circuit 1258 (RD), harness side and ground.
- Are the resistances greater than 10,000 ohms?
- U6 CHECK CIRCUIT 1257 (WH/LB) FOR AN OPEN BETWEEN THE RCM AND THE DRIVER SEAT SIDE AIR BAG MODULE
- Key in OFF position.
- Depower the system. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
- Disconnect: Driver Seat Side Air Bag Module Restraint System Diagnostic Tool (Vehicles With Seat Side Air Bags).
- Disconnect: Driver Seat Side Air Bag Bridge Resistor (Vehicles Without Seat Side Air Bags).
- Disconnect: RCM C310a and C310b.
- Measure the resistance between RCM C310b pin 1, circuit 1257 (WH/LB), harness side and driver seat side air bag module C3226 pin 1, circuit 1257 (WH/LB), harness side.
- Is the resistance less than 0.5 ohm?
- Yes : GO to U7.
- No : REPAIR circuit 1257 (WH/LB). GO to U18.
- U7 CHECK CIRCUIT 1258 (RD) FOR AN OPEN BETWEEN THE RCM AND THE DRIVER SEAT SIDE AIR BAG MODULE
- Measure the resistance between RCM C310b pin 2, circuit 1258 (RD), harness side and driver seat side air bag module C3226 pin 2, circuit 1258 (RD), harness side.
- Is the resistance less than 0.5 ohm?
- U8 CHECK FOR LOW RESISTANCE ON CIRCUITS 1257 (WH/LB) AND BETWEEN 1258 (RD) THE DRIVER SEAT SIDE AIR BAG MODULE AND RCM
- Key in OFF position.
- Depower the system. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
- Disconnect: Driver Seat Side Air Bag Module Restraint System Diagnostic Tool (Vehicles With Seat Side Air Bags).
- Disconnect: Driver Seat Side Air Bag Bridge Resistor (Vehicles Without Seat Side Air Bags).
- Measure the resistance between driver seat side air bag module C3226 pin 1, circuit 1257 (WH/LB), harness side and pin 2, circuit 1258 (RD), harness side.
- Is the resistance greater than 10,000 ohms?
- Yes : GO to U16.
- No : GO to U9.
- U9 CHECK FOR LOW RESISTANCE BETWEEN RCM PINS 1 AND 2
- Disconnect: RCM C310a and C310b.
- Measure the resistance between RCM C310b pin 1, component side and pin 2, component side.
- Is the resistance greater than 10,000 ohms?
- U10 CHECK CIRCUITS 1259 (WH/YE) AND 1260 (BN/YE) FOR A SHORT TO BATTERY BETWEEN THE RCM AND THE PASSENGER SEAT SIDE AIR BAG MODULE
- Key in OFF position.
- Depower the system. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
- Disconnect: Passenger Seat Side Air Bag Module Restraint System Diagnostic Tool (Vehicles With Seat Side Air Bags).
- Disconnect: Passenger Seat Side Air Bag Bridge Resistor (Vehicles Without Seat Side Air Bags).
- Disconnect: RCM C310a and C310b.
- Key in ON position.
- Measure the voltage between passenger seat side air bag module C3227 pin 1, circuit 1259 (WH/YE), harness side and ground; and between passenger seat side air bag module C3227 pin 2, circuit 1260 (BN/YE), harness side and ground.
- Are the voltages less than 0.2 volt?
- U11 CHECK CIRCUITS 1259 (WH/YE) AND 1260 (BN/YE) FOR A SHORT TO GROUND BETWEEN THE RCM AND THE PASSENGER SEAT SIDE AIR BAG MODULE
- Key in OFF position.
- Depower the system. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
- Disconnect: Passenger Seat Side Air Bag Module Restraint System Diagnostic Tool (Vehicles With Seat Side Air Bags).
- Disconnect: Passenger Seat Side Air Bag Bridge Resistor (Vehicles Without Seat Side Air Bags).
- Disconnect: RCM C310a and C310b.
- Measure the resistance between RCM C310b pin 21, circuit 1259 (WH/YE), harness side and ground; and between RCM C310b pin 22, circuit 1260 (BN/YE), harness side and ground.
- Are the resistances greater than 10,000 ohms?
- U12 CHECK CIRCUIT 1259 (WH/YE) FOR AN OPEN BETWEEN THE RCM AND THE PASSENGER SEAT SIDE AIR BAG MODULE
- Key in OFF position.
- Depower the system. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
- Disconnect: Passenger Seat Side Air Bag Module Restraint System Diagnostic Tool (Vehicles With Seat Side Air Bags).
- Disconnect: Passenger Seat Side Air Bag Bridge Resistor (Vehicles Without Seat Side Air Bags).
- Disconnect: RCM C310b.
- Measure the resistance between RCM C310b pin 21, circuit 1259 (WH/YE), harness side and passenger seat side air bag module C3227 pin 1, circuit 1259 (WH/YE), harness side.
- Is the resistance less than 0.5 ohm?
- Yes : GO to U13.
- No : REPAIR circuit 1259 (WH/YE). GO to U18.
- U13 CHECK CIRCUIT 1260 (BN/YE) FOR AN OPEN BETWEEN THE RCM AND THE PASSENGER SEAT SIDE AIR BAG MODULE
- Measure the resistance between RCM C310b pin 22, circuit 1260 (BN/YE), harness side and passenger seat side air bag module C3227 pin 2, circuit 1260 (BN/YE), harness side.
- Is the resistance less than 0.5 ohm?
- U14 CHECK FOR LOW RESISTANCE ON CIRCUITS 1259 (WH/YE) AND 1260 (BN/YE) BETWEEN THE PASSENGER SEAT SIDE AIR BAG MODULE AND THE RCM
- Key in OFF position.
- Depower the system. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
- Disconnect: Passenger Seat Side Air Bag Module Restraint System Diagnostic Tool (Vehicles With Seat Side Air Bags).
- Disconnect: Passenger Seat Side Air Bag Bridge Resistor (Vehicles Without Seat Side Air Bags).
- Measure the resistance between passenger seat side air bag module C3227 pin 1, circuit 1259 (WH/YE), harness side and pin 2, circuit 1260 (BN/YE), harness side.
- Is the resistance greater than 10,000 ohms?
- Yes : GO to U16.
- No : GO to U15.
- U15 CHECK FOR LOW RESISTANCE BETWEEN RCM CIRCUITS 1259 (WH/YE) AND 1260 (BN/YE)
- Disconnect: RCM C310a and C310b.
- Measure the resistance between RCM C310b pin 21, circuit 1259 (WH/YE), component side and pin 22, circuit 1260 (BN/YE), component side.
- Is the resistance greater than 10,000 ohms?
- Yes : REPAIR circuit 1259 (WH/YE) and circuit 1260 (BN/YE). GO to U18.
- No : GO to U16.
- U16 CONFIRM THE RCM FAULT NOTE: Make sure all restraint system diagnostic tools, sensor electrical connectors 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.
- Connect: Restraint System Diagnostic Tools (Vehicles With Seat Side Air Bags).
- Connect: Seat Side Air Bag Bridge Resistors (Vehicles Without Seat Side Air Bags).
- Connect: RCM C310a and C310b.
- Repower the system. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
- Enter the following diagnostic mode on the scan tool: On-Demand Self Test.
- Enter the following diagnostic mode on the scan tool: Flag DTC B2295/Record All Flagged Faults.
- Was DTC B2295 retrieved during the on-demand self test?
- Yes
: If a flagged fault of "?
" was recorded, multiple faults exist and the entire pinpoint test must be carried out.
INSTALL a new RCM. REFER to RESTRAINTS CONTROL MODULE (RCM) . GO to U18.
- 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. ACTIVATE other systems in the same wire harness. REPAIR any intermittent concerns found. GO to U18.
- U17 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 seat side air bag module:
- Disconnect the driver seat side air bag module C3226.
- Connect restraint system diagnostic tool 418-133 to driver seat side air bag module C3226.
- If the flagged fault was flagged for the passenger seat side air bag module:
- Disconnect the passenger seat side air bag module C3227.
- Connect restraint system diagnostic tool 418-133 to passenger seat side air bag module C3227.
- 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 scan tool: On-Demand Self Test.
- Enter the following diagnostic mode on the scan tool: Flag DTC B2295/Record All Flagged Faults.
- Was DTC B2295 retrieved during the on-demand self test?
- Yes
: This is a hard fault. The fault condition is now present. This fault cannot be cleared until it is corrected and the DTC is no longer retrieved during the on-demand self test. CHECK for causes of the intermittent fault at or near the affected seat side air bag module connector. REPAIR any intermittent concerns found.
If an intermittent concern was found and repaired, GO to U18.
If an intermittent concern was not found and repaired, USE the flagged faults recorded and GO to the appropriate PINPOINT TEST .
If a flagged fault of "? " was recorded, multiple faults exist and the entire pinpoint test must be carried out.
For driver seat side air bag module (DFSIDE) with a short to battery (STB) fault, GO to U4.
For driver seat side air bag module (DFSIDE) with a short to ground (STG) fault, GO to U5.
For driver seat side air bag module (DFSIDE) with an open circuit (O_CIR) fault, GO to U6.
For driver seat side air bag module (DFSIDE) with a low resistance (LOWRES) fault, GO to U8.
For passenger seat side air bag module (PFSIDE) with a short to battery (STB) fault, GO to U10.
For passenger seat side air bag module (PFSIDE) with a short to ground (STG) fault, GO to U11.
For passenger seat side air bag module (PFSIDE) with an open circuit (O_CIR) fault, GO to U12.
For passenger seat side air bag module (PFSIDE) with a low resistance (LOWRES) fault, GO to U14.
- 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. ACTIVATE others systems in the same wire harness. REPAIR any intermittent concerns found. GO to
- U18 CHECK FOR ADDITIONAL DTCs
- Refer to the continuous DTCs recorded during Step U1.
- Were any continuous DTCs retrieved during Step U1 ?
- Yes : Do not clear any DTCs until all DTCs have been resolved. GO to the RESTRAINTS CONTROL MODULE (RCM) DIAGNOSTIC TROUBLE CODE (DTC) PRIORITY 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.