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 1.5—3.7 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 (INFLATOR NO.1)
•  Using the M-MDS, verify the following PID/DATA monitor. (See PID/DATA MONITOR TABLE.)
―  DABAGR
•  Is the resistance of the driver-side air bag module normal?
―  Resistance: 1.5—3.7 ohms
Yes
Replace the SAS control module.
(See SAS CONTROL MODULE REMOVAL/INSTALLATION.)
No
Go to the next step.
2
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.
•  Remove the driver-side air bag module.
•  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.
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 2A and 2B.
•  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?
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 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 column cover.
•  Disconnect the clock spring connector.
•  Remove the glove compartment.
•  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.
•  Inspect the wiring harness between SAS control module terminal 1M and clock spring terminal 1L, SAS control module terminal 1I and clock spring terminal 1J for the following:
―  Short to ground
―  Short to power supply
―  Open circuit
•  Is the wiring harness normal?
Yes
Replace the SAS control module.
(See SAS CONTROL MODULE REMOVAL/INSTALLATION.)
No
Replace the air bag wiring harness.