NO.2 AIR BAG SYSTEM WARNING LIGHT ILLUMINATES CONSTANTLY

id080300800300

2 | Air bag system warning light is illuminated constantly.
DESCRIPTION | Air bag system warning light is illuminated constantly and remains illuminated after 6 s have elapsed.
POSSIBLE CAUSE | • Weak battery • SAS control module malfunction • Instrument cluster (circuit board) malfunction • No connection in SAS control module connector • Poor contact in instrument cluster connector • Open or short to power supply circuit in wiring harness between instrument cluster and SAS control module • Poor contact at terminals 1D and/or 1K of SAS control module connector • Poor contact in wiring harness between terminal 1K of SAS control module connector and ground • Poor contact in wiring harness between battery and terminal 1D of SAS control module

Diagnostic Procedure

STEP | INSPECTION | ACTION
--- | --- | ---
1 | INSPECT BATTERY • Measure the voltage of battery. • Is the voltage 9 V or more? | Yes | Go to the next step.
No | Battery is weak. Inspect charge/discharge system, then go to Step 9. (See BATTERY INSPECTION [MZI-3.7].)
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 air bag system service warnings and cautions before handling the air bag system components. (See AIR BAG SYSTEM SERVICE WARNINGS.) (See AIR BAG SYSTEM SERVICE CAUTIONS.) • Switch the ignition to off. • Disconnect the negative battery cable and wait for 1 min or more. • Remove the console. (See CONSOLE REMOVAL/INSTALLATION.) • Are all SAS control module connectors securely connected? | Yes | Go to the next step.
No | Reconnect the connector properly, then go to Step 9.
3 | INSPECT DTCS IN SAS CONTROL MODULE • Inspect the DTC for the SAS control module on-board diagnostic system. • Have DTCs been recorded in memory? | Yes | Perform the applicable DTC inspection, then go to Step 9. (See DTC TABLE.)
No | Go to the next step.
4 | INSPECT DTCS IN INSTRUMENT CLUSTER • Inspect the DTC for the instrument cluster on-board diagnostic system. • Have DTCs been recorded in memory? | Yes | Perform the applicable DTC inspection, then go to Step 9. (See CLEARING DTC [INSTRUMENT CLUSTER].)
No | Go to the next step.
5 | INSPECT INSTRUMENT CLUSTER • Inspect the instrument cluster warning lights using check code. (See INSTRUMENT CLUSTER INPUT/OUTPUT CHECK MODE.) • Are the check results okay? | Yes | Go to the next step.
No | Repair or replace the instrument cluster according to inspection results. Then go to Step 9.
6 | INSPECT POWER SUPPLY CIRCUIT OF SAS CONTROL MODULE (TERMINAL 1D) • Switch the ignition to off. • Disconnect the negative battery cable and wait for 1 min or more. • Connect all disconnected SAS system connectors during diagnosis. • Connect the driver and passenger-side pre-tensioner seat belt connectors. • Connect the driver and passenger-side curtain air bag module connectors. • Connect the driver and passenger-side front seat connectors. • Connect the passenger-side air bag module connector. • Connect the clock spring connector. • Inspect the voltage for PID/DATA monitor IGN_V_2 item using M-MDS. • Is the voltage of at least one terminal 8 V—16 V? | Yes | Go to the Step 8.
No | Go to the next step.
7 | INSPECT WIRING HARNESS BETWEEN BATTERY AND FUSE BLOCK • Connect the negative battery cable. • Switch the ignition to on. • Measure the voltage at instrument cluster connector terminal 1V. • Is the voltage 8 V—16 V? | Yes | Go to the next step.
No | Repair the wiring harnesses, then go to Step 9.
8 | VERIFY THAT SAS CONTROL MODULE CONNECTOR TERMINAL 1K IS GROUND • Inspect the wiring harness between SAS control module connector terminal 1K and ground for the following: ― Short to power supply ― Open circuit • Is the wiring harness normal? | Yes | Replace the SAS control module, then go to the next step. (See SAS CONTROL MODULE REMOVAL/INSTALLATION.)
No | Replace the wiring harnesses, then go to the next step.
9 | CONFIRM THAT MALFUNCTION SYMPTOMS DO NOT RECUR AFTER REPAIR • Switch the ignition to off. • Disconnect the negative battery cable and wait for 1 min or more. • Connect all disconnected SAS system connectors during diagnosis. • Connect the negative battery cable. • Switch the ignition to on. • Does the 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.