NO.2 AIR BAG SYSTEM WARNING LIGHT ILLUMINATES CONSTANTLY
id080300800300
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2
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Air bag system warning light is illuminated constantly.
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DETECTION CONDITION
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Malfunction in air bag system warning light circuit (open circuit or short to power supply).
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POSSIBLE CAUSE
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• 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
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Diagnostic Procedure
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STEP |
INSPECTION |
ACTION |
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1
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INSPECT BATTERY
• Measure the voltage of battery.
• Is the voltage 9 V or more?
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Yes
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Go to the next step.
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No
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Battery is weak.
Inspect charge/discharge system, then go to Step 10.
(See BATTERY INSPECTION [MZI-3.7].)
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2
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VERIFY THAT SAS CONTROL MODULE CONNECTOR IS CONNECTED
• Turn the ignition switch to LOCK position.
• 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?
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Yes
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Go to the next step.
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No
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Reconnect the connector properly, then go to Step 10.
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3
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INSPECT DTCS IN INSTRUMENT CLUSTER
• Inspect the DTC for the instrument cluster on-board diagnostic system.
• Has DTC U2064 been recorded in memory?
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Yes
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Go to the next step.
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No
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Inspect the instrument cluster. (See INSTRUMENT CLUSTER INSPECTION.)
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4
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INSPECT DTCS IN SAS CONTROL MODULE
• Inspect the DTC for the SAS control module on-board diagnostic system.
• Have DTCs been recorded in memory?
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Yes
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Perform the applicable DTC inspection, then go to Step 10.
(See DTC TABLE.)
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No
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Go to the next step.
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5
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INSPECT DTCS IN INSTRUMENT CLUSTER
• Inspect the DTC for the instrument cluster on-board diagnostic system.
• Have DTCs been recorded in memory?
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Yes
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Perform the applicable DTC inspection, then go to Step 10.
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No
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Go to the next step.
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6
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INSPECT INSTRUMENT CLUSTER
• Inspect the instrument cluster warning lights using check code.
• Are the check results okay?
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Yes
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Go to the next step.
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No
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Repair or replace the instrument cluster according to inspection results.
Then go to Step 10.
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7
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INSPECT POWER SUPPLY CIRCUIT OF SAS CONTROL MODULE (TERMINAL 1D)
• Turn the ignition switch to LOCK position.
• 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.
• 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?
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Yes
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Go to the Step 9.
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No
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Go to the next step.
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8
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INSPECT WIRING HARNESS BETWEEN BATTERY AND FUSE BLOCK
• Connect the negative battery cable.
• Turn the ignition switch to ON position.
• Measure the voltage at instrument cluster connector terminal 1H.
• Is the voltage 8 V—16 V?
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Yes
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Go to the next step.
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No
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Repair the wiring harnesses, then go to Step 10.
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9
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VERIFY THAT SAS CONTROL MODULE CONNECTOR TERMINAL 1D IS GROUND
• Turn the ignition switch to LOCK position.
• Disconnect the negative battery cable and wait for 1 min or more.
• Remove the column cover. (See COLUMN COVER REMOVAL/INSTALLATION.)
• Disconnect the clock spring connector. (See COMBINATION SWITCH REMOVAL/INSTALLATION.)
• Remove the glove compartment. (See GLOVE COMPARTMENT REMOVAL/INSTALLATION.)
• Disconnect the passenger-side air bag module connector. (See PASSENGER-SIDE AIR BAG MODULE REMOVAL/INSTALLATION.)
• Disconnect the driver and passenger-side front seat connectors. (See FRONT SEAT REMOVAL/INSTALLATION.)
• Disconnect the driver and passenger-side curtain air bag module connectors. (See CURTAIN AIR BAG MODULE REMOVAL/INSTALLATION.)
• Remove the B-pillar lower trim. (See B-PILLAR LOWER TRIM REMOVAL/INSTALLATION.)
• Disconnect the driver and passenger-side pre-tensioner seat belt connectors. (See FRONT SEAT BELT REMOVAL/INSTALLATION.)
• Disconnect the SAS control module connectors. (See SAS CONTROL MODULE REMOVAL/INSTALLATION.)
• Inspect the wiring harness between SAS control module connector terminal 1D and ground for the following:
• Is the wiring harness normal?
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Yes
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Replace the SAS control module, then go to the next step.
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No
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Replace the wiring harnesses, then go to the next step.
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10
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CONFIRM THAT MALFUNCTION SYMPTOMS DO NOT RECUR AFTER REPAIR
• Turn the ignition switch to LOCK position.
• 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.
• Turn the ignition switch to ON position.
• Does the air bag system warning light operate properly?
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Yes
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Complete troubleshooting, then explain repairs to customer.
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No
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Recheck malfunction symptoms, then repeat from Step 1 if malfunction recurs.
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