DTC B1144, B1145
id080200809800
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DTC |
B1144 |
Driver‐side side air bag sensor No.2 system internal circuit disabled |
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B1145 |
Driver‐side side air bag sensor No.2 system communication error |
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DETECTION CONDITION
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• Malfunction in wiring harness between driver-side side air bag sensor No.2 and SAS control module
• Malfunction in driver-side side air bag sensor No.2 circuit
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POSSIBLE CAUSE
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• Driver-side side air bag sensor No.2 connector malfunction
• Open or short circuit in wiring harness between driver-side side air bag sensor No.2 and SAS control module
• Driver-side side air bag sensor No.2 malfunction (Including incorrect assembly)
• SAS control module malfunction
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Diagnostic procedure
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STEP |
INSPECTION |
ACTION |
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1
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INSPECT DRIVER‐SIDE SIDE AIR BAG SENSOR NO.2 CONNECTOR
• Turn the ignition switch to the LOCK position.
• Disconnect the negative battery cable and wait for 1 min or more.
• Remove the trunk side trim (driver-side).
• Disconnect the driver-side side air bag sensor No.2 connector.
• Is there any malfunction of the driver-side side air bag sensor No.2 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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2
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INSPECT WIRING HARNESS BETWEEN DRIVER-SIDE SIDE AIR BAG SENSOR NO.2 AND SAS CONTROL MODULE
• Remove the column cover. (See COLUMN COVER REMOVAL/INSTALLATION.)
• Disconnect the clock spring connector.
• Remove the glove compartment. (See GLOVE COMPARTMENT REMOVAL/INSTALLATION.)
• Disconnect the passenger-side air bag module connector.
• Disconnect the driver and passenger-side front seat connectors.
• Disconnect the driver and passenger-side curtain air bag module connectors.
• Remove the console.
(See CONSOLE REMOVAL/INSTALLATION.)
• Disconnect the SAS control module connector.
• Disconnect the driver-side side air bag sensor No.2 connector.
• Connect the negative battery cable.
• Inspect the wiring harnesses between SAS control module connector terminal 3X and driver-side side air bag sensor No.2 connector terminal A, SAS control module connector terminal 3W and driver-side side air bag sensor No.2 connector terminal B for the following:
• Is the wiring harness normal?
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Yes
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Go to the next step.
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No
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Replace the air bag wiring harness.
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3
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INSPECT THE WIRING HARNESS BETWEEN THE SAS CONTROL MODULE AND DRIVER-SIDE SIDE AIR BAG SENSOR NO.2 FOR A SHORT CIRCUIT TO THE POWER SUPPLY
• Turn the ignition switch to the ON position with SAS control module connector and driver-side air bag sensor No.2 disconnected.
• Measure the voltage of SAS control module connector terminals 3X and 3W of SAS control module harness side connector.
• Is the voltage measured?
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Yes
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Replace the wiring harness between the SAS control module and the driver-side side air bag sensor No.2.
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No
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Replace the driver-side side air bag sensor No.2, then go to the next step.
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4
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PERFORM DTC INSPECTION
• Turn the ignition switch to the LOCK position.
• Disconnect the negative battery cable and wait for 1 min or more.
• Reconnect the disconnected connectors.
• Connect the negative battery cable.
• Turn the ignition switch to the ON position.
• Clear DTCs using the M-MDS.
(See CLEARING DTC.)
• Perform the DTC inspection for the SAS control module using the M-MDS.
(See DTC DISPLAY.)
• Are DTCs B1144 and/or B1145 displayed?
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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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