NO.1 AIR BAG SYSTEM WARNING LIGHT DOES NOT ILLUMINATE

id080300800200

1

Air bag system warning light does not illuminate.

DETECTION CONDITION

Malfunction in air bag system warning light circuit (short to ground)

POSSIBLE CAUSE

• SAS unit malfunction
• Instrument cluster (print plate) malfunction
• Short to ground circuit in wiring harness between instrument cluster and SAS unit

Diagnostic Procedure

• When performing an asterisked (*) troubleshooting inspection, shake the wiring harness and connectors while doing the inspection to discover whether poor contact points are the cause of any intermittent malfunction. If there is a problem, check to make sure 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 ignition switch to ON position.
• Do other warning and indicator lights illuminate?
Yes
Turn ignition switch to LOCK position, then go to next step.
No
Inspect instrument cluster power supply system and ground system, then go to Step 5.
2
INSPECT SAS UNIT
Warning
• Handling air bag system components improperly can accidentally deploy air bag modules and pre-tensioner seat belts, which may seriously injure you. Read AIR BAG SYSTEM SERVICE WARNINGS before handling air bag system components.
(See SERVICE WARNINGS)
• Turn ignition switch to LOCK position.
• Disconnect negative battery cable and wait for more than 1 minute.
• Remove column cover.
• Disconnect clock spring connector.
• Remove glove compartment.
• Disconnect passenger-side air bag module connector.
• Disconnect driver and passenger-side side air bag module connectors. (Vehicles with side air bag)
• Disconnect driver and passenger-side curtain air bag module connectors. (Vehicles with curtain air bag)
• Remove B-pillar lower trims. (Vehicle with pre-tensioner seat belt)
• Disconnect driver- and passenger-side pre-tensioner seat belt connectors. (Vehicle with pre-tensioner seat belt)
• Turn up floor covering.
• Disconnect all SAS unit connectors.
• Connect negative battery cable.
• Turn ignition switch to ON position.
• Does air bag system warning light illuminate?
Yes
Replace SAS unit, then go to Step 5.
No
Go to next step.
*3
INSPECT WIRING HARNESS BETWEEN SAS UNIT AND INSTRUMENT CLUSTER FOR SHORT TO GROUND
• Turn ignition switch to LOCK position.
• Disconnect negative battery cable.
• Disconnect instrument cluster connector.
• Is there continuity between terminal 1O of instrument cluster connector and ground?
Yes
Replace wiring harness, then go to Step 5.
No
Go to next step.
4
INSPECT INSTRUMENT CLUSTER
• Connect instrument cluster connector.
• Connect instrument cluster connector terminal 1O to ground, then reconnect
connector.
• Connect negative battery cable.
• Does air bag system warning light illuminate with ignition switch ON?
Yes
Replace instrument cluster, then go to next step.
No
Go to next step.
5
CONFIRM THAT MALFUNCTION SYMPTOMS DO NOT RECUR AFTER REPAIR
• Turn ignition switch to LOCK position.
• Disconnect negative battery cable and wait for more than 1 minute.
• Connect all SAS unit connectors.
• Connect driver and passenger-side
pre-tensioner seat belt connectors. (Vehicles with pre-tensioner seat belt)
• Connect driver and passenger-side curtain air bag module connectors. (Vehicles with curtain air bag)
• Connect driver and passenger-side side air bag module connectors. (Vehicles with side air bag)
• Connect passenger-side air bag module connector.
• Connect clock spring connector.
• Connect negative battery cable.
• Turn ignition switch to ON position.
• Does 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.