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Home >> Mazda >> 2013 >> 5 Grand Touring >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> On-Board Diagnostic [Air Bag System - Two-Step Deployment Control System) >> DTC B1058, B2228, B2230, B2232, B2234 [Two-Step Deployment Control System] >> Diagnostic Procedure

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.

    (See AIR BAG SYSTEM SERVICE WARNINGS .)

    (See AIR BAG SYSTEM SERVICE CAUTIONS .)

 Yes Replace clock spring.
(See CLOCK SPRING REMOVAL/INSTALLATION .)
No Go to the next step.
2 INSPECT CLOCK SPRING 
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 .)
3 INSPECT WIRING HARNESS BETWEEN CLOCK SPRING AND SAS CONTROL MODULE 
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 CLOCK SPRING FOR A SHORT CIRCUIT TO THE POWER SUPPLY 
  • Connect the negative battery cable.
  • Switch the ignition to ON with SAS control module connector and clock spring connector disconnected.
  • Measure the voltage of SAS control module connector terminals 1Q and 1U.
NOTE:
  • Measure the voltage while shaking the wiring harness between the SAS control module and clock spring.
  • 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 
  • Switch the ignition to off.
  • Disconnect the negative battery cable and wait for 1 min or more  .
  • Connect the leads of the SST (Fuel and thermometer checker)  or apply 2 ohms  resistance to clock spring connector terminals 4A-4B.
  • 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.
  • Switch the ignition to ON.
  • Clear the DTC for the SAS control module using the M-MDS.

    (See CLEARING DTC [TWO-STEP DEPLOYMENT CONTROL SYSTEM] .)

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

    (See DTC INSPECTION [TWO-STEP 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/INSTALLATION [TWO-STEP DEPLOYMENT CONTROL SYSTEM] .)
6 PERFORM SAS CONTROL MODULE DTC INSPECTION 
  • Switch the ignition to off.
  • Disconnect the negative battery cable and wait for 1 min 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.
  • Switch the ignition to ON.
  • Clear the DTC for the SAS control module using the M-MDS.

    (See CLEARING DTC [TWO-STEP DEPLOYMENT CONTROL SYSTEM] .)

  • Perform the DTC inspection for the SAS control module using the M-MDS. (See DTC INSPECTION [TWO-STEP DEPLOYMENT CONTROL SYSTEM] .)
  • Are the same DTCs present?
 Yes Replace the SAS control module.
(See SAS CONTROL MODULE REMOVAL/INSTALLATION .)
No DTC troubleshooting completed.
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