Pinpoint Test P: LFC 34/DTC B1934 - Air Bag Driver Inflator Circuit Resistance Low On Squib
- P1 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: Never probe the connectors on the air bag module. Doing so can result in air bag deployment, which can result in personal injury.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 scan tool: Retrieve/Record On-Demand DTCs.
- Enter the following diagnostic mode on the scan tool: Retrieve/Record Continuous DTCs.
- Was DTC B1934 retrieved during the on-demand self test?
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. Go to P2.
No : This is an intermittent fault. The fault condition is not present at this time. Go to P7.
- P2 CHECK THE DRIVER AIR BAG MODULE
- Key in OFF position.
- Depower the system. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
- Remove the driver air bag module. Refer to DRIVER AIR BAG MODULE .
- Connect: Restraint System Diagnostic Tool 418-F088 to Driver Air Bag Module Electrical Connector.
- 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.
- Was DTC B1934 retrieved during the on-demand self test?
Yes : Go to P3.
No : INSTALL a new driver air bag module. REFER to DRIVER AIR BAG MODULE . Go to P8.
- P3 CHECK CIRCUIT 614 (GY/OG) AND CIRCUIT 615 (GY/WH) FOR LOW RESISTANCE BETWEEN THE DRIVER AIR BAG MODULE AND RCM
- Key in OFF position.
- Depower the system. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
- Disconnect: Driver Air Bag Module Restraint System Diagnostic Tool.
- Measure the resistance between driver air bag module connector, circuit 614 (GY/OG), and circuit 615 (GY/WH), harness side.
- Is the resistance greater than 10,000 ohms?
Yes : Go to P6.
No : Go to P4.
- P4 CHECK CIRCUIT 614 (GY/OG) AND CIRCUIT 615 (GY/WH) FOR LOW RESISTANCE BETWEEN THE CLOCKSPRING AND RCM
- Disconnect: Clockspring C218b.
- Measure the resistance between clockspring C218b-3, circuit 614 (GY/OG), harness side and clockspring C218b-1, circuit 615 (GY/WH), harness side.
- Is the resistance greater than 10,000 ohms?
Yes : INSTALL a new clockspring. REFER to CLOCKSPRING . Go to P8.
No : Go to P5.
- P5 CHECK THE RCM
- Disconnect: RCM C2041.
- Measure the resistance between RCM C2041 pin 3, component side and RCM C2041 pin 4, component side.
- Is the resistance greater than 10,000 ohms?
Yes : Go to P6.
No : REPAIR circuit 614 (GY/OG) and 615 (GY/WH). Go to P8.
- P6 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.
- Connect: Driver Air Bag Module Restraint System Diagnostic Tool.
- Connect: RCM C2041.
- 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.
- Was DTC B1934 retrieved during the on-demand self test?
Yes : INSTALL and CONFIGURE a new RCM. REFER to RESTRAINTS CONTROL MODULE (RCM) . Go to P8.
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 P8.
- P7 CHECK FOR AN INTERMITTENT FAULT
- Key in OFF position.
- Depower the system. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
- Remove the driver air bag module. Refer to DRIVER AIR BAG MODULE .
- Connect: Restraint System Diagnostic Tool 418-F088 to Driver Air Bag Module Electrical Connector.
- 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.
- Was DTC B1934 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 intermittent fault at or near the driver air bag module connector. REPAIR any intermittent concerns found.
If an intermittent concern was found and repaired, Go to P8.
If an intermittent concern was not found, Go to P3.
No : CHECK for causes of intermittent low resistance on circuit 614 (GY/OG), circuit 615 (GY/WH), and the clockspring assembly. ATTEMPT to recreate the hard fault by flexing the wire harness and cycling the ignition key frequently. REPAIR any intermittent concerns found. Go to P8.
- P8 CHECK FOR ADDITIONAL DTCs
- Refer to the continuous DTCs recorded during Step P1.
- Were any continuous DTCs retrieved during Step P1 ?
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 .
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.