DTC B1057, B1916, B1932, B1934, B1936

id080200811300

DTC

B1057

Driver-side air bag module and other air bag module circuits short

B1916

Driver-side air bag module circuit short to power supply

B1932

Driver-side air bag module circuit resistance high

B1934

Driver-side air bag module circuit resistance low

B1936

Driver-side air bag module circuit short to body ground
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.
•  Resistance other than 1.39—6.23 ohms detected in driver-side air bag module circuit
•  Malfunction in wiring harness between driver-side air bag module and SAS control module
POSSIBLE CAUSE
•  Open or short circuit in wiring harness between clock spring and SAS control module
•  Clock spring malfunction
•  Driver-side air bag module malfunction
•  SAS control module malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
INSPECT DRIVER-SIDE AIR BAG MODULE CONNECTOR (CLOCK SPRING)
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.
•  Disconnect the driver-side air bag module connector. (See DRIVER-SIDE AIR BAG MODULE REMOVAL/INSTALLATION.)
•  Is there any malfunction of the driver-side air bag module connector?
Yes
Replace the air bag wiring harness and /or clock spring.
No
Go to the next step.
2
INSPECT WIRING HARNESS BETWEEN CLOCK SPRING AND SAS CONTROL MODULE
•  Turn the ignition switch to the LOCK position.
•  Disconnect the negative battery cable and wait for 1 min or more.
•  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 terminal 1M and clock spring terminal 1D, SAS control module terminal 1I and clock spring terminal 1C for the following:
―  Short to ground
―  Short to power supply
―  Open circuit
Note
•  Inspect for continuity while shaking the wiring harness between the driver-side air bag module and SAS control module.
•  Is the wiring harness normal?
Yes
Go to the next step.
No
Replace the air bag wiring harness.
3
VERIFY WHETHER MALFUNCTION IS IN DRIVER-SIDE AIR BAG MODULE OR RELATED WIRING HARNESS
•  Connect the leads of the SST (Fuel and thermometer checker) or apply 2-ohm resistance to driver-side air bag module connector terminals 3A and 3B.
•  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 B1057, B1916, B1932, B1934 and/or B1936 displayed?
Yes
Go to the next step.
No
Replace the driver-side air bag module.
(See DRIVER-SIDE AIR BAG MODULE REMOVAL/INSTALLATION.)
4
INSPECT CLOCK SPRING
•  Inspect the clock spring.
•  Is the clock spring normal?
Yes
Go to the next step.
No
Replace the clock spring.
(See CLOCK SPRING REMOVAL/INSTALLATION.)
5
INSPECT DTCs
•  Clear DTCs using the M-MDS.
(See CLEARING DTC.)
•  Verify DTCs using the M-MDS.
(See DTC DISPLAY.)
•  Is DTC B1057, B1916, B1932, B1934 and/or B1936 displayed again?
•  Are there other DTCs output?
Yes
Replace the SAS control module.
(See SAS CONTROL MODULE REMOVAL/INSTALLATION.)
No
DTC troubleshooting completed.