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DTC 91

BME080201046221

DTC 91 | Air bag system warning light circuit
DETECTION CONDITION |

  Warning

  • Detection conditions are for understanding DTC outline before performing inspection. Performing inspection with only detection conditions may cause injury due to operating error or damage the system. When performing inspection, always follow inspection procedure.

• Malfunction in air bag system warning light circuit
POSSIBLE CAUSE | • Air bag system warning light bulb malfunction • METER 10 A fuse malfunction • Instrument cluster malfunction • Malfunction of connectors between instrument cluster and SAS unit • Open or short circuit in wiring harness between METER 10 A fuse and instrument cluster
• Open or short circuit in wiring harness between instrument cluster and SAS unit
• SAS unit malfunction

Diagnostic procedure

STEP | INSPECTION | ACTION
--- | --- | ---
1 | • Is this present malfunction diagnosis? | Yes | Replace SAS unit. (See SAS UNIT REMOVAL/INSTALLATION.)
No | Go to next step.
2 | INSPECT METER 10 A FUSE • Turn ignition switch to LOCK position. • Disconnect negative battery cable. • Remove METER 10 A fuse. • Is fuse okay? | Yes | Reinstall METER 10 A fuse, then go to next step.
No | Replace METER 10 A fuse.
3 | INSPECT AIR BAG SYSTEM WARNING LIGHT BULB • Remove instrument cluster. • Remove air bag system warning light bulb. • Is bulb okay? | Yes | Reinstall air bag system warning light bulb, then go to next step.
No | Replace air bag system warning light bulb.
4 | INSPECT INSTRUMENT CLUSTER • Is there continuity between instrument cluster terminals 1J and 1R? | Yes | Go to next step.
No | Replace instrument cluster.
5 | INSPECT FOR CONTINUITY BETWEEN METER 10 A FUSE AND INSTRUMENT CLUSTER • Connect negative battery cable. • Turn ignition switch to ON position. • Measure voltage at instrument cluster connector terminal 1J. • Is voltage more than 9 V? | Yes | Go to next step.
No | Repair wiring harness.
6 | INSPECT WIRING HARNESS BETWEEN INSTRUMENT CLUSTER AND 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 clock spring.
(See CLOCK SPRING REMOVAL/INSTALLATION.)
• 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)
• 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.
• Inspect wiring harness between instrument cluster connector terminal 1R and SAS unit connector terminal 2W for following.

  - Short to ground
  - Short to power supply
  - Open circuit

• Is wiring harness okay?
Yes
Go to next step.
No | Replace wiring harness.
7 | INSPECT WIRING HARNESS BETWEEN DLC AND SAS unit • Inspect wiring harness between DLC terminal FAB and SAS unit connector terminal 2W for following.

  - Short to ground
  - Short to power supply

• Is wiring harness okay?
Yes
Troubleshooting completed.
No | Replace wiring harness.