System malfunction location

• B0001:11: Driver-side air bag module circuit short to body ground

• B0001:12: Driver-side air bag module circuit short to power supply

• B0001:13: Driver-side air bag module circuit open circuit or resistance high

• B0001:19: Short circuit to driver-side air bag module and other air bag module circuits

• B0001:1A: Driver-side air bag module circuit resistance low

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 1.37–6.33 ohms detected in driver-side air bag module circuit

• Wiring harness between driver-side air bag module and SAS control module has malfunction

Fail-safe function

Not applicable

Possible cause

• Clock spring connector malfunction

• Clock spring malfunction

• Short circuit to power supply or body ground in the wiring harness between the clock spring and SAS control module

• Open circuit in the wiring harness between the clock spring and SAS control module

• Driver-side air bag module malfunction

• SAS control module malfunction

Step

Inspection

Action

1

WARNING:

• Handling the component parts improperly can accidentally operate (deploy) the air bag modules and pre-tensioner seat belts, which may seriously injure you. Read the service warnings/cautions and the workshop manual before handling the air bag system components.

  (See AIR BAG SYSTEM SERVICE WARNINGS [STANDARD DEPLOYMENT CONTROL SYSTEM].) (See AIR BAG SYSTEM SERVICE CAUTIONS [STANDARD DEPLOYMENT CONTROL SYSTEM].)

• Switch the ignition off.

• Disconnect the negative battery cable and wait for 1 min or more.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

• Remove the driver-side air bag module connector.

  (See DRIVER-SIDE AIR BAG MODULE REMOVAL [STANDARD DEPLOYMENT CONTROL SYSTEM].)

• Inspect the clock spring connector. (Corrosion, damage, and disconnected pins)

• Is there any malfunction of the clock spring connector?

Yes

Replace clock spring.

(See CLOCK SPRING REMOVAL/INSTALLATION [STANDARD DEPLOYMENT CONTROL SYSTEM].)

Then go to Step 7.

No

Go to the next step.

2

• Remove the steering wheel.

  (See STEERING WHEEL AND COLUMN REMOVAL/INSTALLATION.)

• Remove the column cover.

  (See COLUMN COVER REMOVAL/INSTALLATION.)

• Remove the clock spring.

  (See CLOCK SPRING REMOVAL/INSTALLATION [STANDARD DEPLOYMENT CONTROL SYSTEM].)

• Inspect for continuity between clock spring connector terminals 2B—4A and 2A—4B.

NOTE:

• Inspect the clock spring wiring harness for continuity while shaking it.

• Is there continuity?

Yes

Go to the next step.

No

Replace clock spring.

(See CLOCK SPRING REMOVAL/INSTALLATION [STANDARD DEPLOYMENT CONTROL SYSTEM].)

Then go to Step 7.

3

• Remove the passenger-side lower panel.

  (See PASSENGER-SIDE LOWER PANEL REMOVAL/INSTALLATION.)

• Disconnect the passenger-side air bag module connector.

  (See PASSENGER-SIDE AIR BAG MODULE REMOVAL/INSTALLATION [STANDARD DEPLOYMENT CONTROL SYSTEM].)

• Disconnect the driver and passenger-side seat connectors.

  (See SEAT REMOVAL/INSTALLATION.)

• Remove the back trim.

  (See BACK TRIM REMOVAL/INSTALLATION.)

• Disconnect the driver and passenger-side pre-tensioner seat belt connectors.

  (See SEAT BELT REMOVAL/INSTALLATION.)

• Disconnect the all SAS control module connectors.

  (See SAS CONTROL MODULE REMOVAL/INSTALLATION [STANDARD DEPLOYMENT CONTROL SYSTEM].)

• Inspect for continuity between the following terminals (wiring harness-side) and body ground:

• SAS control module terminal 3C

• SAS control module terminal 3G

NOTE:

• Inspect for continuity while shaking the wiring harness between the SAS control module and clock spring.

• Is there continuity?

Yes

Refer to the wiring diagram and verify whether or not there is a common connector between SAS control module terminal and clock spring terminal.

If there is a common connector:

• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to ground.

• Replace the malfunctioning part.

If there is no common connector:

• Replace the wiring harness which has a short to ground.

Go to Step 7.

No

Go to the next step.

4

• SAS control module and clock spring connectors are disconnected.

• Inspect for continuity between the following terminals (wiring harness-side):

• Clock spring terminal 2B—SAS control module terminal 3C

• Clock spring terminal 2A—SAS control module terminal 3G

NOTE:

• Inspect for continuity while shaking the wiring harness between the SAS control module and clock spring.

• Is there continuity?

Yes

Go to the next step.

No

Refer to the wiring diagram and verify whether or not there is a common connector between SAS control module terminal and clock spring terminal.

If there is a common connector:

• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for an open circuit.

• Replace the malfunctioning part.

If there is no common connector:

• Replace the wiring harness which has an open circuit.

Go to Step 7.

5

• SAS control module and clock spring connectors are disconnected.

• Connect the negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

• Switch the ignition ON (engine off or on).

• Measure the voltage at the following terminals (wiring harness-side):

• SAS control module terminal 3C

• SAS control module terminal 3G

NOTE:

• Measure the voltage while shaking the wiring harness between the SAS control module and clock spring.

• Is the voltage 0 V?

Yes

Go to the next step.

No

Refer to the wiring diagram and verify whether or not there is a common connector between SAS control module terminal and clock spring terminal.

If there is a common connector:

• Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the common wiring harness for a short to power supply.

• Replace the malfunctioning part.

If there is no common connector:

• Replace the wiring harness which has a short to power supply.

Go to Step 7.

6

• Switch the ignition off.

• Disconnect the negative battery cable and wait for 1 min or more.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

• Connect the SAS control module connectors.

• Except for the driver-side air bag module connector, reconnect all disconnected connectors.

• Connect the SST (Fuel and thermometer checker) or apply 2 ohms resistance to clock spring connector terminals 4A and 4B.

• Set the SST (Fuel and thermometer checker) to 2 ohms.

• Connect the negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

• Switch the ignition ON (engine off or on).

• Clear the DTC for the SAS control module using the M-MDS.

  (See CLEARING DTC [SAS CONTROL MODULE (STANDARD DEPLOYMENT CONTROL SYSTEM)].)

• Perform the DTC inspection for the SAS control module using the M-MDS.

  (See DTC INSPECTION [SAS CONTROL MODULE (STANDARD DEPLOYMENT CONTROL SYSTEM)].)

• 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 [STANDARD DEPLOYMENT CONTROL SYSTEM].)

(See DRIVER-SIDE AIR BAG MODULE INSTALLATION [STANDARD DEPLOYMENT CONTROL SYSTEM].)

Then go to the next step.

7

• Switch the ignition off.

• Disconnect the negative battery cable and wait for 1 min or more.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

• Disconnect the SST (Fuel and thermometer checker) or the 2 ohms resistance.

• Connect the driver-side air bag module connector.

  (See DRIVER-SIDE AIR BAG MODULE INSTALLATION [STANDARD DEPLOYMENT CONTROL SYSTEM].)

• Connect the negative battery cable.

  (See NEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION.)

• Switch the ignition ON (engine off or on).

• Clear the DTC for the SAS control module using the M-MDS.

  (See CLEARING DTC [SAS CONTROL MODULE (STANDARD DEPLOYMENT CONTROL SYSTEM)].)

• Perform the DTC inspection for the SAS control module using the M-MDS.

  (See DTC INSPECTION [SAS CONTROL MODULE (STANDARD DEPLOYMENT CONTROL SYSTEM)].)

• Are the same DTCs present?

Yes

Repeat the inspection from Step 1.

• If the malfunction recurs, replace the SAS control module.

  (See SAS CONTROL MODULE REMOVAL/INSTALLATION [STANDARD DEPLOYMENT CONTROL SYSTEM].)

No

DTC troubleshooting completed.