Possible Causes

Left-side air bag circuit high resistance could be caused by damaged White/Light Blue wire (circuit No. 1257), damaged Brown/Light Blue wire (circuit No. 1258), damaged left side air bag module, 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 FAULT CODES  under DIAGNOSTICS. Perform on-demand self-test. See ON-DEMAND SELF-TEST  under DIAGNOSTICS. If DTC B1994 was retrieved during on-demand self-test, fault is hard. Go to next step. If DTC B1994 was not retrieved, fault is intermittent. Go to step  7 .
2. Check left side air bag module
   
   Turn ignition switch to OFF position. Disable air bag system. See DISABLING SYSTEM  under DISABLING & ACTIVATING AIR BAG SYSTEM. Turn ignition switch to RUN position. Perform on-demand self-test. If DTC B1994 is retrieved, go to step  5 . If DTC B1994 is not retrieved, go to next step.
3. Check left side air bag in-seat harness for high resistance
   
   Turn ignition switch to OFF position. Access and disconnect left side air bag module in-seat harness connector from air bag module. See SIDE AIR BAG MODULE  under REMOVAL & INSTALLATION. Measure resistance of White/Light Blue wire (circuit No. 1257) between harness side of left side air bag module in-seat connector and seat harness side of left side air bag module floor connector. If resistance is more than one ohm, repair open in White/Light Blue wire. See WIRING DIAGRAMS  . Go to step  8 . If resistance is less than one ohm, go to next step.
4. Check left side air bag in-seat harness for high resistance
   
   Measure resistance of Brown/Light Blue wire (circuit No. 1258) between harness side of left side air bag module in-seat connector and seat harness side of left side air bag module floor connector. If resistance is more than one ohm, repair open in Brown/Light Blue wire. Go to step  8 . If resistance is less than one ohm, replace left side air bag module. Go to step  8 .
   NOTE: By disconnecting RCM connector C2004, circuit No. 1257 (White/Blue wire) and No. 1258 (Brown/Light Blue wire) are shorted together with shorting bar. Do not remove shorting bar.
5. Check left side air bag harness for high resistance
   
   Turn ignition switch to OFF position. Access RCM and disconnect harness connector C2004. See RESTRAINTS CONTROL MODULE (RCM)  under REMOVAL & INSTALLATION. Remove left side air bag module simulator from harness connector. Zero ohmmeter. Measure resistance between White/Light Blue and Brown/Light Blue wires on vehicle harness side of left side air bag module floor connector. If resistance is more than one ohm, repair open in appropriate wire. See WIRING DIAGRAMS  . Go to step  8 . If resistance is less than one ohm, replace RCM. Go to next step.
6. Check left side air bag circuit to seat harness
   
   Disconnect left side air bag module simulator from harness connector. Inspect all crimps, terminals, wires and connectors in circuit No. 1257 (White/Light Blue wire) between left side air bag module floor harness connector and RCM connector C2004, terminal No. 2. See Figure . Inspect all crimps, terminals, wires and connectors in circuit No. 1258 (Brown/Light Blue wire) between left side air bag module floor harness connector and RCM connector C2004, terminal No. 3. Also, check for pinched wires and damaged connector terminals. If any damage is found, repair or replace as necessary. Go to step  8 . If no damage is found, replace RCM. Go to step  8 .
7. Check for intermittent fault
   
   Refer to continuous DTCs recorded in step  1 . If DTC retrieved in step  1 was a intermittent fault, check for cause of intermittent high resistance in White/Light Blue and Brown/Light Blue wires. 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. If DTC retrieved in step  1 was not a intermittent fault, go to next step.
8. 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. DO NOT clear any DTCs until all DTCs have been resolved. See DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION  table. 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.