DTC B1913, B1916, B1932, B1934

id080200801700

DTC
B1913
Driver-side air bag module system circuit short to ground
B1916
Driver-side air bag module system circuit short to power supply
B1932
Driver-side air bag module system resistance high
B1934
Driver-side air bag module system resistance low
DETECTION CONDITION
Warning
•  Detection conditions are for understanding the DTC outline before performing an inspection. Performing an inspection with only 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
•  Clock spring connector malfunction
•  Clock spring malfunction
•  Open or short circuit in wiring harness between clock spring and SAS control module
•  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 (F2, G6)/engine (WLT-1, WLT-2, WL-C, WE-C) switch to LOCK position.
•  Disconnect the negative battery cable and wait for 1 min or more.
•  Remove the driver-side air bag module.
•  Inspect the clock spring connector. (Corrosion, damage, and disconnected pins)
•  Is there any malfunction of the driver-side air bag module connector?
Yes
Replace the clock spring.
(See CLOCK SPRING REMOVAL/INSTALLATION.)
No
Go to the next step.
2
INSPECT CLOCK SPRING
•  Remove the steering wheel.
•  Remove the column cover.
•  Remove the clock spring.
•  Inspect for continuity between clock spring connector terminals 1A—3A and 1B—3B.
Note
•  Inspect the clock spring wiring harness for continuity while shaking it.
•  Is there continuity?
Yes
Go to the next step.
No
Replace the clock spring.
(See CLOCK SPRING REMOVAL/INSTALLATION.)
3
INSPECT WIRING HARNESS BETWEEN CLOCK SPRING AND SAS CONTROL MODULE
•  Remove the glove compartment.
•  Disconnect the passenger‐side air bag module connector. (Vehicles with passenger-side air bag)
•  Disconnect the driver and passenger‐side seat connectors. (Vehicles with side air bag)
•  Disconnect the driver and passenger-side pre-tensioner seat belt connectors. (Vehicle with pre-tensioner seat belt)
•  Remove the console.
•  Disconnect the all SAS control module connectors.
•  Inspect the wiring harness between SAS control module connector terminal 1S and clock spring connector terminal 1A, SAS control module connector terminal 1V and clock spring connector terminal 1B for the following:
―  Short circuit between terminals
―  Short to ground
―  Open circuit
Note
•  Inspect for continuity while shaking the wiring harness between the SAS control module and clock spring.
•  Is the wiring harness normal?
Yes
Go to the next step.
No
Replace the wiring harness between the SAS control module and clock spring.
4
INSPECT THE WIRING HARNESS BETWEEN THE SAS CONTROL MODULE AND DRIVER-SIDE AIR BAG MODULE FOR A SHORT CIRCUIT TO THE POWER SUPPLY
•  Connect the negative battery cable.
•  Turn the ignition (F2, G6)/engine (WLT-1, WLT-2, WL-C, WE-C) switch to ON position with SAS control module connector and clock spring connector disconnected.
•  Measure the voltage of SAS control module connector terminals 1S and 1V.
Note
•  Measure the voltage while shaking the wiring harness between the SAS control module and driver-side air bag module.
•  Is the voltage measured?
Yes
Replace the wiring harness between the SAS control module and clock spring.
No
Go to the next step.
5
INSPECT DRIVER-SIDE AIR BAG MODULE
•  Connect the leads of the SST (Fuel and thermometer checker) or apply 2 ohms resistance to clock spring connector terminals 3A and 3B.
•  Set the resistance of the SST (Fuel and thermometer checker) to the 2 ohms position.
•  Except for the driver-side air bag module connector, reconnect all disconnected connectors.
•  Connect the negative battery cable.
•  Turn the ignition (F2, G6)/engine (WLT-1, WLT-2, WL-C, WE-C) switch to ON position.
•  Clear the DTC for the SAS control module using the M-MDS.
•  Perform the DTC inspection for the SAS control module using the M-MDS.
•  Are the same DTCs present?
Yes
Go to the next step.
No
Replace the driver-side air bag module.
(See DRIVER-SIDE AIR BAG MODULE REMOVAL/INSTALLATION.)
6
PERFORM SAS CONTROL MODULE DTC INSPECTION
•  Turn the ignition (F2, G6)/engine (WLT-1, WLT-2, WL-C, WE-C) switch to LOCK position.
•  Disconnect the negative battery cable and wait for 1min or more.
•  Disconnect the SST (Fuel and thermometer checker) or the 2 ohms resistance.
•  Connect the driver-side air bag module connector.
•  Connect the negative battery cable.
•  Turn the ignition (F2, G6)/engine (WLT-1, WLT-2, WL-C, WE-C) switch to ON position.
•  Clear the DTC for the SAS control module using the M-MDS.
•  Perform the DTC inspection for the SAS control module using the M-MDS.
•  Are the same DTCs present?
Yes
Replace the SAS control module.
(See SAS CONTROL MODULE REMOVAL/INSTALLATION.)
No
DTC troubleshooting completed.