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

BME080301046202
• 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.