Possible Causes
Air bag tone warning indicator circuit shorted to ground or open could be caused by short to ground or open in Light Blue/Black wire, damaged or inoperative LCM or faulty RCM.
- Check for hard or intermittent DTC
Turn ignition switch to OFF position. Connect scan tool to Data Link Connector (DLC). See USING SCAN TOOL under DIAGNOSTICS. Turn ignition switch to RUN position. Retrieve and record any continuous DTCs. See RETRIEVING FAULT CODES under DIAGNOSTICS. Perform on-demand self-test. See ON-DEMAND SELF-TEST under DIAGNOSTICS. If DTC B1892 was retrieved during on-demand self-test, fault is hard. Go to next step. If DTC B1892 was not retrieved, fault is intermittent. Go to step 5 . - Check air bag tone warning indicator circuit for short to ground
Turn ignition switch to OFF position. Disable air bag system. See DISABLING SYSTEM under DISABLING & ACTIVATING AIR BAG SYSTEM. Access RCM and disconnect connector C310B. See RESTRAINTS CONTROL MODULE under REMOVAL & INSTALLATION. Access LCM and disconnect connector C2145A. See LIGHTING CONTROL MODULE (LCM) under REMOVAL & INSTALLATION. Measure resistance between harness side of RCM connector C310B, terminals No. 11 (Light Blue/Black wire, circuit No. 1083) and No. 10 (Black wire, circuit No. 57). See Figure . If resistance is more than one megohm, go to next step. If resistance is less than one megohm, repair short to ground in Light Blue/Black wire. See WIRING DIAGRAMS . Go to step 6 . - Check air bag tone warning indicator circuit for open
Measure resistance between harness side of RCM connector C310B, terminal No. 11 and harness side of LCM connector C2145A, terminal No. 17 (Light Blue/Black wire). See Figure & Fig 1 . If resistance is less than 0.5 ohm, go to next step. If resistance is more than 0.5 ohm, repair open in Light Blue/Black wire. Go to step 6 . - Check air bag tone warning indicator
Reconnect LCM connector C2145A. Turn ignition switch to RUN position. Measure voltage between ground and harness side of RCM connector C310B, terminal No. 11 (Light Blue/Black wire). In voltage is less than 0.2 volt, replace LCM. Go to step 6 . If voltage is more than 0.2 volt, replace RCM. Go to step 6 . - Check for intermittent fault
Turn ignition switch to OFF position. Disable air bag system. See DISABLING SYSTEM under DISABLING & ACTIVATING AIR BAG SYSTEM. Perform on-demand self-test. If DTC B1892 was retrieved during on-demand self-test, go to step 2 . If DTC B1892 was not retrieved during on-demand self-test, check for cause of intermittent short to ground or open in Light Blue/Black wire (circuit No. 1083). See WIRING DIAGRAMS . Attempt to recreate fault by flexing wire harness and cycling ignition switch frequently. Repair any intermittent problems found. Go to next step. - Check for additional DTCs
Refer to continuous DTCs recorded in step 1 . If any continuous DTCs were retrieved, go to diagnostic trouble code identification table for direction to appropriate test. See DIAGNOSTIC TROUBLE CODE IDENTIFICATION table. DO NOT clear any DTCs until all DTCs have been resolved. If no DTCs were retrieved, reconnect air bag system. Activate air bag system. See ACTIVATING SYSTEM under DISABLING & ACTIVATING AIR BAG SYSTEM. Clear all DTCs. See CLEARING FAULT CODES under DIAGNOSTICS.
