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NO.2 AIR BAG SYSTEM WARNING LIGHT IS ILLUMINATED ALL THE TIME

id0803a3800600

2 | Air bag system warning light is illuminated all the time.
DETECTION CONDITION | Malfunction in air bag system warning light circuit (open circuit or short to power supply).
POSSIBLE CAUSE | • Weak battery • SAS control module malfunction • Instrument cluster (print plate) malfunction • No connection in SAS control module connector • Poor contact in instrument cluster connector (16-pin) • Open or short to power supply circuit in wiring harness between instrument cluster and SAS control module • Poor contact at terminals 1T, 1X and/or 1W of SAS control module connector • Poor contact in wiring harness between terminal 1X of SAS control module connector and ground • Poor contact in wiring harness between AIR BAG 15 A fuse and terminal 1W of SAS control module

## 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 BATTERY • Measure voltage of battery. • Is voltage 9 V or more? | Yes | Go to the next step.
No | Battery is weak. Inspect charge/discharge system, then go to Step 10. (See BATTERY INSPECTION [L8, LF, L3, L3 Turbo]) (See BATTERY INSPECTION [MZR-CD (RF Turbo)].)
2 | VERIFY THAT SAS CONTROL MODULE CONNECTOR IS CONNECTED 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.) (See SERVICE CAUTIONS.) • Turn ignition switch to LOCK position. • Disconnect the negative battery cable and wait for 1 min or more. • Turn up floor covering. • Are all SAS control module connectors securely connected? | Yes | Go to the next step.
No | Reconnect connector properly, then go to Step 10.
* 3 | INSPECT WIRING HARNESS BETWEEN SAS CONTROL MODULE AND INSTRUMENT CLUSTER FOR CONTINUITY • 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. (Vehicles with side air bag) • Disconnect the driver and passenger-side curtain air bag module connectors. (Vehicles with curtain air bag) • Remove the B-pillar lower trims. (Vehicle with pre-tensioner seat belt) • Disconnect the driver- and passenger-side pre-tensioner seat belt connectors. (Vehicle with pre-tensioner seat belt) • Turn up floor covering. • Disconnect the all SAS control module connectors. • Disconnect the instrument cluster connector. • Is there continuity between SAS control module connector terminal 1T and instrument cluster connector terminal 1O? | Yes | Go to the next step.
No | Replace wiring harness, then go to Step 10.
* 4 | INSPECT WIRING HARNESS BETWEEN SAS CONTROL MODULE AND INSTRUMENT CLUSTER FOR SHORT TO POWER SUPPLY • Connect the negative battery cable. • Turn ignition switch to ON position. • Measure voltage at instrument cluster connector terminal 1O. • Is voltage approx. 9 V or more? | Yes | Replace wiring harness, then go to Step 10.
No | Go to the next step.
5 | CHECK TO SEE WHETHER MALFUNCTION IS IN AIR BAG SYSTEM WARNING LIGHT IN INSTRUMENT CLUSTER • Connect the instrument cluster connector terminal 1O to ground, then reconnect connector. • Does air bag system warning light illuminate with ignition switch ON? | Yes | Replace instrument cluster, then go to Step 10. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION)
No | Go to the next step.
6 | INSPECT POWER SUPPLY CIRCUIT OF SAS CONTROL MODULE (TERMINAL 1W) • Turn ignition switch to LOCK position. • Disconnect the negative battery cable and wait for 1 min or more. • Connect the all SAS control module connectors. • Connect the driver and passenger-side pre-tensioner seat belt connectors. (Vehicles with pre-tensioner seat belt) • Connect the driver and passenger-side curtain air bag module connectors. (Vehicles with curtain air bag) • Connect the driver and passenger-side side air bag module connectors. (Vehicles with side air bag) • Connect the passenger-side air bag module connector. • Connect the clock spring connector. • Inspect voltage for PID/DATA monitor RCM VOLT item using SST (WDS or equivalent ). • Is voltage of at least either terminal 9 V or more? | Yes | Go to Step 9.
No | Go to the next step.
7 | INSPECT WIRING HARNESS BETWEEN BATTERY AND FUSE BLOCK • Remove the driver-side front side trim. • Remove the fuse block without disconnecting connectors. • Turn ignition switch to ON position. • Measure voltage at terminals D (JB-01) of fuse block connector. • Is voltage of at least either terminal 9 V or more? | Yes | Go to the next step.
No | Repair wiring harnesses, then go to Step 9.
8 | INSPECT WIRING HARNESS BETWEEN FUSE BLOCK AND SAS CONTROL MODULE • Measure voltage at terminals G (JB-03) of fuse block connector. • Is voltage of at least either terminal 9 V or more? | Yes | Repair wiring harnesses, then go to Step 10.
No | Inspect fuse block, then go to Step 10.
9 | VERIFY THAT SAS CONTROL MODULE CONNECTOR TERMINAL 1X IS GROUND • Turn 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. (Vehicles with side air bag) • Disconnect the driver and passenger-side curtain air bag module connectors. (Vehicles with curtain air bag) • Remove the B-pillar lower trim. (Vehicle with pre-tensioner seat belt) • Disconnect the driver and passenger-side pre-tensioner seat belt connectors. (Vehicle with pre-tensioner seat belt) • Turn up floor covering. • Disconnect the all SAS control module connectors. • Inspect wiring harness between SAS control module connector terminal 1X and ground for following: - Short to power supply - Open circuit • Is wiring harness normal? | Yes | Replace SAS control module, then go to the next step. (See SAS CONTROL MODULE REMOVAL/INSTALLATION)
No | Replace wiring harnesses, then go to the next step.
10 | CONFIRM THAT MALFUNCTION SYMPTOMS DO NOT RECUR AFTER REPAIR • Turn ignition switch to LOCK position. • Disconnect the negative battery cable and wait for 1 min or more. • Connect the all SAS control module connectors. • Connect the driver and passenger-side pre-tensioner seat belt connectors. (Vehicles with pre-tensioner seat belt) • Connect the driver and passenger-side curtain air bag module connectors. (Vehicles with curtain air bag) • Connect the driver and passenger-side side air bag module connectors. (Vehicles with side air bag) • Connect the passenger-side air bag module connector. • Connect the clock spring connector. • Connect the instrument cluster connector. • Connect the 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.