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NO.1 AIR BAG SYSTEM WARNING LIGHT DOES NOT ILLUMINATE

BHE080301046W02

1 | Air bag system warning light does not illuminate.
DETECTION CONDITION | Malfunction in air bag system warning light circuit (short to body ground)
POSSIBLE CAUSE | • SAS unit malfunction • Instrument cluster (circuit board) malfunction • Short to body ground circuit in wiring harness between instrument cluster and SAS unit

## Diagnostic Procedure

• When performing an asterisked (*) troubleshooting inspection, slightly shake the wiring harness and connectors while performing the inspection to discover whether poor contact points are the cause of any intermittent malfunction. If there is a problem, verfy that connectors, terminals and wiring harness are connected correctly and undamaged.

STEP | INSPECTION | ACTION
--- | --- | ---
1 | INSPECT OTHER WARNING AND INDICATOR LIGHTS CIRCUIT IN INSTRUMENT CLUSTER • Turn the ignition switch to the ON position. • Do other warning and indicator lights illuminate? | Yes | Turn the ignition switch to the LOCK position, then go to the next step.
No | Inspect instrument cluster power supply system and ground system the, then go to Step 4.
2 | INSPECT SAS UNIT Warning • Handling the air bag system components improperly can accidentally deploy the air bag modules and pre-tensioner seat belts, which may seriously injure you. Read the service warnings and cautions before handling the air bag system components. (See SERVICE WARNINGS.) (SeeSERVICE CAUTIONS.) • Turn the ignition switch to LOCK position. • Disconnect the negative battery cable and wait for 1 min or more. • Remove the column cover. • Disconnect the clock spring connector. • Remove the glove compartment. • Disconnect the passenger-side air bag module connector. • Disconnect the driver and passenger-side side air bag module connectors. • Disconnect the driver and passenger-side curtain air bag module connectors. • Remove the rear door lower trim. • Disconnect the driver- and passenger-side pre-tensioner seat belt connectors. • Partially peel back the floor covering. • Disconnect all SAS unit connectors. • Connect the negative battery cable. • Turn the ignition switch to ON position. • Does the air bag system warning light illuminate? | Yes | Replace the SAS unit, then go to Step 4. (See SAS UNIT REMOVAL/INSTALLATION)
No | Go to the next step.
*3 | INSPECT WIRING HARNESS BETWEEN SAS UNIT AND INSTRUMENT CLUSTER FOR SHORT TO GROUND • Turn the ignition switch to LOCK position. • Disconnect the negative battery cable. • Disconnect the instrument cluster connector. • Is there continuity between terminal 2K of the instrument cluster connector and ground? | Yes | Replace the wiring harness, then go to Step 4.
No | Replace the instrument cluster, then go to next step. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION)
4 | CONFIRM THAT MALFUNCTION SYMPTOMS DO NOT RECUR AFTER REPAIR • Turn the ignition switch to LOCK position. • Disconnect the negative battery cable and wait for 1 min or more. • Connect all SAS unit connectors. • Connect the driver and passenger-side pre-tensioner seat belt connectors. • Connect the driver and passenger-side curtain air bag module connectors. • Connect the driver and passenger-side side air bag module connectors. • Connect the passenger-side air bag module connector. • Connect the clock spring connector. • Connect the negative battery cable. • Turn the ignition switch to ON position. • Does the air bag system warning light operate properly? | Yes | Complete troubleshooting, then explain repairs to customer.
No | Recheck malfunction symptoms, then repeat from Step 1 if malfunction recurs.