DTC B1144, B1145


id080200809800

DTC

B1144

Driver‐side side air bag sensor No.2 system internal circuit disabled

B1145

Driver‐side side air bag sensor No.2 system communication error

DETECTION CONDITION
Warning
•  Detection conditions are for understanding the DTC outline before performing an inspection. Performing an inspection according to only the detection conditions may cause injury due to an operating error, or damage the system. When performing an inspection, always follow the inspection procedure.
•  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
POSSIBLE CAUSE
•  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

Diagnostic procedure

STEP

INSPECTION

ACTION

1
INSPECT DRIVER‐SIDE SIDE AIR BAG SENSOR NO.2 CONNECTOR
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 service warnings and cautions before handling the air bag system components.
•  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?
Yes
Replace the air bag wiring harness.
No
Go to the next step.
2
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.
•  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:
―  Short to ground
―  Open circuit
―  Short circuit between terminals
Note
•  Inspect the continuity while shaking the wiring harness between the SAS control module and driver-side side air bag sensor No.2.
•  Is the wiring harness normal?
Yes
Go to the next step.
No
Replace the air bag wiring harness.
3
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.
Note
•  Measure the voltage while shaking the wiring harness between the SAS control module and driver-side side air bag sensor No.2.
•  Is the voltage measured?
Yes
Replace the wiring harness between the SAS control module and the driver-side side air bag sensor No.2.
No
Replace the driver-side side air bag sensor No.2, then go to the next step.
4
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.
•  Are DTCs B1144 and/or B1145 displayed?
Yes
Replace the SAS control module.
No
DTC troubleshooting completed.