Pinpoint Test B: DTC B1884 - Pad Warning Lamp Circuit Failure
- B1 CHECK FOR CONTINUOUS OR ON-DEMAND 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.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 side air curtain module. Doing so can result in side air curtain deployment.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: On-Demand Self Test/Retrieve and Record Continuous Memory DTCs.
- Was on-demand DTC B1884 retrieved?
Yes : If the PAD indicator does illuminate, GO to B2.
If the PAD indicator does not illuminate, GO to B4.
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. GO to B8.
- B2 CHECK CIRCUIT CR116 (GN/WH) FOR SHORT TO GROUND
- Key in OFF position.
- Depower the system. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
- Disconnect: PAD Indicator C2355.
- Measure the resistance between PAD indicator C2355-2, circuit CR116 (GN/WH), harness side and ground.
- Is the resistance greater than 10,000 ohms?
Yes : GO to B7.
No : GO to B3.
- B3 CHECK THE RCM FOR LOW RESISTANCE
- Disconnect: RCM C310a and C310b.
- Measure the resistance between RCM C310a pin 22, component side and ground.
- Is the resistance greater than 10,000 ohms?
Yes : REPAIR circuit CR116 (GN/WH). GO to B9.
No : GO to B7.
- B4 CHECK CIRCUIT CR116 (GN/WH) FOR AN OPEN
- Key in OFF position.
- Depower the system. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
- Disconnect: RCM C310a and C310b.
- Disconnect: PAD Indicator C2355.
- Measure the resistance between PAD indicator C2355-2, circuit CR116 (GN/WH), harness side and RCM C310a-22, circuit CR116 (GN/WH), harness side.
- Is the resistance less than 0.5 ohm?
Yes : GO to B5.
No : REPAIR circuit CR116 (GN/WH). GO to B9.
- B5 CHECK CIRCUIT CBP24 (VT/GN) FOR AN OPEN
- Repower the system. Do not prove out the system at this time. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
- Key in ON position.
- Measure the voltage between PAD indicator C2355-3, circuit CBP24 (VT/GN), harness side and ground.
- Is the voltage greater than 10 volts?
Yes : GO to B6.
No : VERIFY smart junction box (SJB) fuse 24 is OK. If OK, REPAIR circuit CBP24 (VT/GN). GO to B9.
- B6 CHECK THE PAD INDICATOR LAMP
- Key in OFF position.
- Deactivate the system. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEACTIVATION AND REACTIVATION .
- Connect: PAD Indicator C2355.
- Key in ON position.
- Connect a fused jumper wire between RCM C310a-22, circuit CR116 (GN/WH), harness side and ground.
- Does the PAD indicator illuminate?
Yes : GO to B7.
No : INSTALL a new PAD indicator. REFER to PASSENGER AIR BAG DEACTIVATION (PAD) INDICATOR - FUSION, MILAN or PASSENGER AIR BAG DEACTIVATION (PAD) INDICATOR - ZEPHYR . GO to B9.
- B7 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.
- Depower the system. Refer to SUPPLEMENTAL RESTRAINT SYSTEM (SRS) DEPOWERING AND REPOWERING .
- Connect: PAD Indicator C2355 (if disconnected in prior step).
- Connect: RCM C310a and C310b (if disconnected in prior step).
- 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/Retrieve and Record Continuous Memory DTCs.
- Was on-demand DTC B1884 retrieved?
Yes : INSTALL and CONFIGURE a new RCM. REFER to RESTRAINTS CONTROL MODULE (RCM) . GO to B9.
No : CHECK for causes of intermittent open or short to ground on circuit CR116 (GN/WH). 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 B9.
- B8 CHECK FOR AN INTERMITTENT FAULT
- Key in OFF position.
- Enter the following diagnostic mode on the scan tool: On-Demand Self Test/Retrieve and Record Continuous Memory DTCs.
- Was on-demand DTC B1884 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. GO to B2.
No : CHECK for causes of intermittent open or short to ground on circuit CR116 (GN/WH). 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 B9.
- B9 CHECK FOR ADDITIONAL DTCs
- Refer to the continuous memory DTCs recorded during Step B1.
- Were any continuous memory DTCs retrieved during Step B1 ?
Yes : Do not clear any DTCs until all DTCs have been resolved. GO to the SUPPLEMENTAL RESTRAINT SYSTEM (SRS) 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 OCS module and RCM DTCs.