NO.2 AIR BAG SYSTEM WARNING LIGHT ILLUMINATES CONSTANTLY


id080300800300

2
Air bag system warning light is illuminated constantly.
DESCRIPTOIN
After the ignition is switched ON, the air bag system warning light illuminates and continues to illuminate after 6s 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 (24-pin)
•  Open or short to power supply circuit in wiring harness between instrument cluster and SAS control module
•  Poor contact at terminals 3J and/or 3A of SAS control module connector
•  Poor contact in wiring harness between terminal 3J of SAS control module connector and ground
•  Poor contact in wiring harness between battery and terminal 3A of SAS control module


Diagnostic Procedure

STEP

INSPECTION

ACTION

1
INSPECT BATTERY
•  Measure the voltage of battery.
•  Is the voltage 8 V or more?
Yes
Go to the next step.
No
Battery is weak.
Inspect charge/discharge system, then go to Step 8.
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.
•  Switch the ignition to off.
•  Disconnect the negative battery cable and wait for 1 min or more.
•  Remove the rear console. (See REAR 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 8.
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 8.
(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 8.
No
Go to the next step.
5
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.
•  Do other warning and indicator lights illuminate?
Yes
Go to the next step.
No
Repair the instrument cluster.
Then go to Step 8.
6
INSPECT WIRING HARNESS BETWEEN BATTERY AND FUSE BLOCK
•  Disconnect the negative battery cable and wait 1 min or more.
•  Remove the rear console.
•  Disconnect the SAS control module connector.
•  Connect the negative battery cable.
•  Switch the ignition to ON.
•  Measure the voltage at SAS control module harness-side connector terminal 3A.
•  Is the voltage 8 V—16 V?
Yes
Go to the next step.
No
Repair the wiring harnesses, then go to Step 8.
7
VERIFY THAT SAS CONTROL MODULE CONNECTOR TERMINAL 3J IS GROUND
•  Switch the ignition to off.
•  Disconnect the negative battery cable and wait for 1 min or more.
•  Remove the console. (See REAR CONSOLE REMOVAL/INSTALLATION.)
•  Disconnect all SAS control module control model connectors.
•  Inspect the wiring harness between SAS control module connector terminal 3J 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.
No
Replace the wiring harnesses, then go to the next step.
8
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 SAS control module connectors.
•  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.
•  Connect the instrument cluster connector.
•  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.