NO.1 AIR BAG SYSTEM WARNING LIGHT DOES NOT ILLUMINATE WHEN IGNITION SWITCH IS TURNED TO ON POSITION

BME080301046W02

• 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 malfunctions. If there is a problem, check to make sure connectors, terminals and wiring harness are connected correctly and undamaged.

1

Air bag system warning light does not illuminate when ignition switch is turned to ON position.

TROUBLESHOOTING HINTS

• Malfunction in air bag system warning light circuit
- Instrument cluster (print plate) malfunction
- Air bag system warning light bulb malfunction
- Poor contact in instrument cluster connector (24 pin)
- Open or short circuit in wiring harness between instrument cluster and SAS unit
- SAS unit malfunction
Note
• When inserting insulator between SAS unit connector terminals and short bar, insert it as shown in the figure.

Diagnostic procedure

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 6.
2
INSPECT AIR BAG SYSTEM WARNING LIGHT BULB
• Disconnect negative battery cable.
• Remove instrument cluster.
• Is air bag system warning light bulb functional?
Yes
Reinstall it properly, then go to next step.
No
Replace bulb, then go to Step 6.
* 3
INSPECT WIRING HARNESS BETWEEN SAS UNIT AND INSTRUMENT CLUSTER FOR CONTINUITY
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.
• Remove clock spring.
• Remove glove compartment.
• Disconnect passenger-side air bag module connector.
• Disconnect driver and passenger-side side air bag module connectors. (Vehicle with side 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.
• Is there continuity between SAS unit connector terminal 2W and instrument cluster connector terminal 3R?
Yes
Go to next step.
No
Replace wiring harness, then go to Step 6.
* 4
INSPECT WIRING HARNESS BETWEEN SAS UNIT AND INSTRUMENT CLUSTER FOR SHORT TO POWER SUPPLY
• Connect negative battery cable.
Caution
• Be sure not to cause damage to short bar when inserting insulator. If short bar is damaged, you may not be able to properly inspect connection of SAS unit connector.
• Insert insulator between SAS unit connector terminals 2W and 2T so short bar cannot function.
• Turn ignition switch to ON position.
• Measure voltage at instrument cluster connector terminal 3R.
• Is voltage more than approximately 9 V?
Yes
Replace wiring harness, then go to Step 6.
No
Go to next step.
5
VERIFY WHETHER MALFUNCTION IS IN AIR BAG SYSTEM WARNING LIGHT IN INSTRUMENT CLUSTER OR SAS UNIT
• Connect instrument cluster connector terminal 3R to ground, then reconnect connector.
• Does air bag system warning light illuminate with ignition switch ON?
Yes
Replace SAS unit, then go to next step.
No
Replace instrument cluster, then go to next step.
6
VERIFY WHETHER MALFUNCTION SYMPTOM OCCURS AFTER REPAIR OR NOT
• Connect all SAS unit connectors.
• Connect driver and passenger-side pre-tensioner seat belt connectors. (Vehicle with pre-tensioner seat belt)
• Connect driver- and passenger-side side air bag module connectors. (Vehicle with side air bag)
• Connect passenger-side air bag module connector.
• Connect clock spring connector.
• Connect instrument cluster 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.