Possible Causes

Air bag tone warning indicator circuit shorted to battery or ignition could be caused by short to battery or ground in White/Black wire (circuit No. 8-JA13), damaged or inoperative instrument cluster, or RCM internal fault.

1. 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 DIAGNOSTIC TROUBLE CODES (DTCS)  under DIAGNOSTICS. Perform on-demand self-test. See ON-DEMAND SELF-TEST  under DIAGNOSTICS. If DTC B1891 was retrieved during on-demand self-test, fault is hard. Go to next step. If DTC B1891 was not retrieved, fault is intermittent. Go to step  4 .
2. Check air bag tone warning indicator circuit
   
   Turn ignition switch to OFF position. Disable air bag system. See DISABLING SYSTEM  under DISABLING & ACTIVATING AIR BAG SYSTEM. Leave negative battery cable disconnected. Access RCM and disconnect harness connector C310A. See RESTRAINTS CONTROL MODULE (RCM)  under REMOVAL & INSTALLATION. Access and disconnect instrument cluster connector C220B. See INSTRUMENT CLUSTER  under REMOVAL & INSTALLATION. See Figure . Turn ignition switch to RUN position. Measure resistance between RCM harness connector C310A, terminals No. 26 (White/Black wire) and No. 2 (Pink/Orange wire). See Figure . If resistance is less than 10 k/ohms, repair short to voltage in White/Black wire. See WIRING DIAGRAMS  . Go to step  5 . If resistance is more than 10 k/ohms, go to next step.
3. Check air bag tone warning indicator
   
   Turn ignition switch to OFF position. Reconnect instrument cluster harness connector. Reconnect negative battery cable. Turn ignition switch to RUN position. Connect fused jumper wire between ground and RCM harness connector C310A, terminal No. 26 (White/Black wire). If instrument cluster does not generate a tone, repair or replace instrument cluster. Go to step  5 . If instrument cluster generates a tone, replace RCM. Go to step  5 .
4. 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 B1891 was retrieved during on-demand self-test, go to step  2 . If DTC B1891 was not retrieved during on-demand self-test, check for causes of intermittent short to battery or ignition in White/Black wire. See WIRING DIAGRAMS  . Attempt to recreate fault flexing wire harness and cycling ignition switch frequently. Repair any intermittent problems found. Go to next step.
5. 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 (DTC) 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.