DTC B1056, B2777, B2778, B2779, B2780
B3E080201046W29
Diagnostic procedure
STEP
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INSPECTION
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ACTION
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1
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INSPECT PASSENGER-SIDE CURTAIN AIR BAG MODULE
• Using the WDS or equivalent, verify the following PID/DATA monitor.
(See PID/DATA MONITOR TABLE.)
• Is the resistance of the passenger-side curtain air bag module normal?
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Yes
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Replace the SAS control module.
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No
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Go to the next step.
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||
2
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INSPECT PASSENGER-SIDE CURTAIN AIR BAG MODULE CONNECTOR
• Turn the ignition switch to the LOCK position.
• Disconnect the negative battery cable and wait for 1 min or more.
• Disconnect the passenger-side curtain air bag module connector.
• Is there any malfunction of the passenger-side curtain air bag module connector?
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Yes
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Replace the air bag wiring harness.
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No
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Go to the next step.
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3
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VERIFY WHETHER MALFUNCTION IS IN PASSENGER-SIDE CURTAIN AIR BAG MODULE OR RELATED WIRING HARNESS
• Connect the leads of the SST (Fuel and thermometer checker) or apply 2-ohm resistance to passenger-side curtain air bag module connector terminals A and B.
• Set the resistance of the SST (Fuel and thermometer checker) to the 2-ohm position.
• Connect the negative battery cable.
• Turn the ignition switch to the ON position.
• Are DTCs B1056, B2777, B2778, B2779 and/or B2780 indicated?
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Yes
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Replace the air bag wiring harness, then go to the next step.
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No
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Replace the passenger-side curtain air bag module.
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4
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INSPECT SAS CONTROL MODULE
• Turn the ignition switch to the LOCK position.
• Disconnect the negative battery cable and wait for 1 min or more.
• Connect the passenger-side curtain air bag module connector.
• Are DTCs B1056, B2777, B2778, B2779 and/or B2780 indicated?
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Yes
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Replace the SAS control module.
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No
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DTC troubleshooting completed.
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