NO.2 AIR BAG SYSTEM WARNING LIGHT IS ILLUMINATED ALL THE TIME
id080300800600
2
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Air bag system warning light is illuminated all the time.
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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 (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 1D and/or 2AB of SAS control module connector
• Poor contact in wiring harness between terminal 2AB of SAS control module connector and ground
• Poor contact in wiring harness between AIR BAG 15 A fuse and terminal 1D of SAS control module
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Diagnostic Procedure
STEP |
INSPECTION |
ACTION |
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1
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INSPECT BATTERY
• Measure voltage of battery.
• Is 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 9.
(See BATTERY INSPECTION[LF, L3].)
(See BATTERY INSPECTION[L3 Turbo].)
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2
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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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3
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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 6.
(See DTC TABLE.)
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No
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Go to the next step.
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4
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VERIFY THAT SAS CONTROL MODULE CONNECTOR IS CONNECTED
• 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?
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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 9.
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5
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INSPECT POWER SUPPLY CIRCUIT OF SAS CONTROL MODULE (TERMINAL 1D)
• Inspect voltage for PID/DATA monitor IGN_V item using M-MDS.
(See PID/DATA MONITOR TABLE.)
• Is the PID value 9.0 V or more?
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Yes
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Go to step 8.
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No
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Go to the next step.
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6
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INSPECT WIRING HARNESS BETWEEN BATTERY AND PJB
• Remove the PJB without disconnecting connectors.
• Turn ignition switch to ON position
• Measure voltage at terminals J-03 AM of PJB connector.
• Is voltage of at least either terminal 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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Repair wiring harnesses, then go to step 8.
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7
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INSPECT WIRING HARNESS BETWEEN PJB AND SAS CONTROL MODULE
• Measure voltage at terminals J-03 AP of PJB connector.
• Is voltage of at least either terminal 9 V or more?
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Yes
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Repair wiring harnesses, then go to step 9.
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No
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Inspect PJB, then go to step 9.
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8
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VERIFY THAT SAS CONTROL MODULE CONNECTOR TERMINAL 2AB IS GROUND
• Turn the ignition switch to the 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 front seat connectors. (Vehicles with side air bag module)
• Disconnect the driver and passenger-side curtain air bag module connectors. (Vehicles with curtain air bag module)
• Remove the B-pillar lower trims.
• Disconnect the driver-side and passenger-side pre-tensioner seat belt connector.
• Turn up floor covering.
• Disconnect the all SAS control module connectors.
• Inspect wiring harness between SAS control module connector terminal 2AB and ground for following:
• Is wiring harness normal?
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Yes
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Replace the SAS control module, then go to step 6.
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No
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Replace wiring harnesses, then go to the next step.
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9
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CONFIRM THAT MALFUNCTION SYMPTOMS DO NOT RECUR AFTER REPAIR
• Turn the ignition switch to the LOCK position.
• Disconnect the negative battery cable and wait for 1 min or more.
• Connect the all SAS control module connectors.
• Connect the driver-side and passenger-side pre-tensioner seat belt connector.
• Connect the driver and passenger-side curtain air bag module connectors. (Vehicles with curtain air bag module)
• Connect the front seat connectors. (Vehicles with side air bag module)
• 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?
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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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