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Home >> Mazda >> 2012 >> 5 Sport, Automatic Trans >> Repair and Diagnosis (Single Page) >> Restraints >> Air Bag, SRS >> On-Board Diagnostic [Air Bag System - Two-Step Deployment Control System) >> DTC B105B, B110C, B1144, B1145 [Two-Step Deployment Control System] >> Diagnostic Procedure
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Diagnostic Procedure

STEP INSPECTION ACTION
1 INSPECT DRIVER-SIDE SIDE AIR BAG SENSOR NO.2 CONNECTOR 
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 WARNINGS .)

  • Switch the ignition to off.
  • Disconnect the negative battery cable and wait for 1 min or more  .
  • Remove the driver-side trunk side trim. (See TRUNK SIDE TRIM REMOVAL/INSTALLATION .)
  • Disconnect the driver-side side air bag sensor No.2 connector. (See SIDE AIR BAG SENSOR NO. 2 REMOVAL/INSTALLATION .)
  • Inspect the driver-side side air bag sensor No.2 connector. (Corrosion, damage, and disconnected pins)
  • Is there any malfunction of the driver-side side air bag sensor No.2 connector?
 Yes Replace the driver-side side air bag sensor No.2 wiring harness.
No Go to the next step.
2 INSPECT WIRING HARNESS BETWEEN DRIVER-SIDE SIDE AIR BAG SENSOR NO.2 AND SAS CONTROL MODULE 
NOTE:
  • Inspect for continuity while shaking the wiring harness between the driver-side side air bag sensor No.2 and SAS control module.
  • Is the wiring harness normal?
 Yes Replace the driver-side side air bag sensor No.2, then go to the next step.
(See SIDE AIR BAG SENSOR NO. 2 REMOVAL/INSTALLATION .)
No Replace the air bag wiring harness.
3 INSPECT THE WIRING HARNESS BETWEEN THE SAS CONTROL MODULE AND DRIVER-SIDE SIDE AIR BAG SENSOR NO.2 FOR A SHORT CIRCUIT TO THE POWER SUPPLY 
  • Connect the negative battery cable.
  • Switch the ignition to ON with SAS control module connector and driver-side side air bag sensor No.2 connector disconnected.
  • Measure the voltage of SAS control module connector terminals 2AM and 2AI of SAS control module harness side connector.
NOTE:
  • Measure the voltage while shaking the wiring harness between the SAS control module and driver-side side air bag sensor No.2.
  • Is the voltage measured?
 Yes Replace the wiring harness between the SAS control module and the driver-side side air bag sensor No.2.
No Replace the driver-side side air bag sensor No.2, then go to the next step.
(See SIDE AIR BAG SENSOR NO. 2 REMOVAL/INSTALLATION .)
4 PERFORM SAS CONTROL MODULE DTC INSPECTION  Yes Replace the SAS control module.
(See SAS CONTROL MODULE REMOVAL/INSTALLATION .)
No DTC troubleshooting completed.
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