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Home >> Mazda >> 2013 >> 5 Grand Touring >> Repair and Diagnosis >> Restraints >> Air Bag, SRS >> On-Board Diagnostic [Air Bag System - Standard Deployment Control System) >> DTC B1057, B1916, B1932, B1934, B1936 [Standard Deployment Control System] >> Diagnostic Procedure

Diagnostic Procedure

Step Inspection Action
1 INSPECT DRIVER-SIDE AIR BAG MODULE CONNECTOR (CLOCK SPRING) 
WARNING:
Yes Replace the 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 the 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.
  • Turn the ignition switch to the ON position with SAS control module connector and clock spring connector disconnected.
  • Measure the voltage of SAS control module connector terminals 1I and 1M.
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 3A-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.
  • Switch the ignition to ON.
  • Clear the DTC for the SAS control module using the M-MDS. (See CLEARING DTC [STANDARD DEPLOYMENT CONTROL SYSTEM] .)
  • Perform the DTC inspection for the SAS control module using the M-MDS. (See DTC INSPECTION [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/INSTALLATION [STANDARD 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 [STANDARD DEPLOYMENT CONTROL SYSTEM] .)
  • Perform the DTC inspection for the SAS control module using the M-MDS. (See DTC INSPECTION [STANDARD DEPLOYMENT CONTROL SYSTEM] .)
  • Are the same DTCs present?
Yes Replace the SAS control module.
(See SAS CONTROL MODULE REMOVAL/INSTALLATION .)
No DTC troubleshooting completed.