Probable Causes

Passenger air bag circuit failure can be caused by short to ground or battery in circuit No. 607 (Light Blue/Orange wire) or circuit No. 616 (Pink/Black wire) or short to ground or battery in passenger-side air bag module.

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 B1920 was retrieved during on-demand self-test, fault is hard. Go to next step. If DTC B1920 was not retrieved, fault is intermittent. Go to step  6 .
2. Check passenger-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. See ON-DEMAND SELF-TEST  under DIAGNOSTICS. If DTC B1920 is retrieved, go to next step. If DTC B1920 is not retrieved, replace passenger-side air bag module. See PASSENGER-SIDE AIR BAG MODULE  under REMOVAL & INSTALLATION. Go to step  7 .
   NOTE: Do not separate or remove shorting bars from ECS module connector.
3. Check passenger-side air bag circuit for short to ground
   
   Turn ignition switch to OFF position. Access and disconnect ECS module harness connector. See ELECTRONIC CRASH SENSOR (ECS) MODULE  under REMOVAL & INSTALLATION. Measure resistance between harness side of ECS module connector terminals No. 14 (Light Blue/Orange wire) and No. 21 (Black/Light Blue wire, circuit No. 875). See Figure . If resistance is less than 10 k/ohms, repair short to ground in Light Blue/Orange or Pink/Black wire. Go to step  7 . If resistance is more than 10 k/ohms, go to next step.
   NOTE: Do not separate or remove shorting bars from ECS module connector.
4. Check passenger-side air bag circuit for short to battery
   
   Measure voltage between ground and harness side of ECS module connector terminals No. 14 (Light Blue/Orange wire). If voltage is more than 0.2 volt, repair short to battery in Light Blue/Orange or Pink/Black wire. Go to step  7 . If voltage is less than 0.2 volt, go to next step.
5. Check passenger-side air bag wiring
   
   Disconnect air bag simulator from passenger-side air bag module harness connector. Inspect all crimps, terminals, wires and connectors in circuits No. 607 (Light Blue/Orange wire) and No. 616 (Pink/Black wire) feeding ECS module connector. See WIRING DIAGRAMS  . Check for pinched wires and damaged connector pins and terminals. If damage is found, repair as necessary. Go to step  7 . If no damage was found, replace ECS module. Go to step  7 .
6. Check for intermittent fault
   
   Refer to continuous DTCs recorded in step  1 . If DTC retrieved in step  1 was an intermittent fault, check for causes of intermittent short to ground or battery in circuits No. 607 (Light Blue/Orange wire) and No. 616 (Pink/Black wire). See WIRING DIAGRAMS  . Attempt to recreate fault by flexing wire harness and cycling ignition key frequently. Repair any intermittent problems. Go to next step. If no intermittent problems are found, go to next step.
7. 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 continuous 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.