NO.1 AIR BAG SYSTEM WARNING LIGHT DOES NOT ILLUMINATE

id080300800200

1

Air bag system warning light does not illuminate.

DESCRIPTOIN

Air bag system warning light does not illuminate while the air bag system is performing initialization.

POSSIBLE CAUSE

•  Instrument cluster (circuit board) malfunction

•  Short to ground circuit in wiring harness between instrument cluster and SAS control module

•  Air bag system warning light (LED) malfunction

•  Communication error between SAS control module and instrument cluster

•  SAS control module malfunction

Diagnostic Procedure

STEP

INSPECTION

ACTION

1

INSPECT OTHER WARNING AND INDICATOR LIGHTS CIRCUIT IN INSTRUMENT CLUSTER

•  Switch the ignition to ON.

•  Do other warning and indicator lights illuminate?

Yes

Switch the ignition to off, then go to the next step.

No

Inspect the instrument cluster power supply system and ground system, then go to Step 4.

2

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 5. (See DTC TABLE.)

No

Go to the next step.

3

VERIFY WHERE MALFUNCTION IS IN WARNING LIGHTS INDICATION CIRCUIT OR ELSEWHERE

•  Turn on all warning lights and indicator lights using the instrument cluster PID WL+IL of simulation function using the M-MDS.
(See ACTIVE COMMAND MODES INSPECTION [INSTRUMENT CLUSTER].)

•  Do other waning and indicator lights illuminate?

Yes

Go to the next step.

No

Replace the instrument cluster.

(See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.)

Then go to Step 5.

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 the next step.

(See DTC TABLE [INSTRUMENT CLUSTER].)

No

Go to the next step.

5

CONFIRM THAT MALFUNCTION SYMPTOMS DO NOT RECUR AFTER REPAIR

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.

•  Connect all disconnected SAS system connectors.

•  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.

1	Air bag system warning light does not illuminate.
DESCRIPTOIN	Air bag system warning light does not illuminate while the air bag system is performing initialization.
POSSIBLE CAUSE	• Instrument cluster (circuit board) malfunction • Short to ground circuit in wiring harness between instrument cluster and SAS control module • Air bag system warning light (LED) malfunction • Communication error between SAS control module and instrument cluster • SAS control module malfunction

STEP	INSPECTION		ACTION
1	INSPECT OTHER WARNING AND INDICATOR LIGHTS CIRCUIT IN INSTRUMENT CLUSTER • Switch the ignition to ON. • Do other warning and indicator lights illuminate?	Yes	Switch the ignition to off, then go to the next step.
1		No	Inspect the instrument cluster power supply system and ground system, then go to Step 4.
2	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 5. (See DTC TABLE.)
2		No	Go to the next step.
3	VERIFY WHERE MALFUNCTION IS IN WARNING LIGHTS INDICATION CIRCUIT OR ELSEWHERE • Turn on all warning lights and indicator lights using the instrument cluster PID WL+IL of simulation function using the M-MDS. (See ACTIVE COMMAND MODES INSPECTION [INSTRUMENT CLUSTER].) • Do other waning and indicator lights illuminate?	Yes	Go to the next step.
3		No	Replace the instrument cluster. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION.) Then go to Step 5.
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 the next step. (See DTC TABLE [INSTRUMENT CLUSTER].)
4		No	Go to the next step.
5	CONFIRM THAT MALFUNCTION SYMPTOMS DO NOT RECUR AFTER REPAIR 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. • Connect all disconnected SAS system connectors. • 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.
5		No	Recheck malfunction symptoms, then repeat from Step 1 if malfunction recurs.