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Home >> Mazda >> 2002 >> Tribute LX, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 377 (On-Board Diagnostic (Air Bag System]) >> DTC B2434, B2435, B2691 >> Diagnostic procedure

Diagnostic procedure

WARNING: This page is about a different car, the 2005 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
DTC B2434, B2435, B2691 DIAGNOSTIC PROCEDURE

STEP INSPECTION ACTION
1 INSPECT DRIVER-SIDE BUCKLE SWITCH CIRCUIT 
  • Check the following PID/DATA monitor, using SST  (WDS or equivalent). (See PID/DATA MONITOR TABLE  .)
    • DR_BUKL
  • Is driver-side buckle switch circuit normal?
 Yes Present malfunction diagnosis: 

Past malfunction diagnosis: 
  • Troubleshooting completed.
No Go to next step.
2 INSPECT DRIVER-SIDE BUCKLE MODULE 
  • Turn ignition switch to LOCK position.
  • Disconnect negative battery cable and wait for more than 1 minute. 
  • Disconnect driver-side buckle switch.
  • Inspect wiring harness between driver-side buckle switch terminal B and ground for short to power supply, and open circuit.
  • Is driver-side buckle switch normal?
 Yes Go to next step.
No Replace wiring harness.
3 INSPECT WIRING HARNESS BETWEEN DRIVER-SIDE BUCKLE SWITCH AND SAS CONTROL MODULE 
WARNING:
  • Handling the air bag system components improperly can accidentally operate (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 SERVICE WARNINGS .)

    (See SERVICE CAUTIONS .)


  • Remove column cover.
  • Disconnect clock spring connector.
  • Remove glove compartment.
  • Disconnect passenger-side air bag module connector.
  • Disconnect driver and passenger-side curtain air bag module connectors. (Vehicles with curtain air bag)
  • Disconnect driver and passenger-side side air bag module connectors. (Vehicles with side air bag)
  • Remove B-pillar lower trims. (Vehicles with pre-tensioner seat belt)
  • Disconnect driver and passenger-side pre-tensioner seat belt connectors. (Vehicles with pre-tensioner seat belt)
  • Turn up floor covering.
  • Disconnect all SAS control module connectors.
  • Inspect the following wiring harness between SAS control module and driver-side buckle switch terminals for short to ground, short to power supply, and open circuit:
    • 2T-A
  • Is wiring harness okay?
 Yes Replace the driver-side front buckle. (See FRONT BUCKLE REMOVAL/INSTALLATION .)
If the DTC is displayed even after the buckle switch is replaced, replace the SAS control module. (See SAS CONTROL MODULE REMOVAL/INSTALLATION .)
No Replace wiring harness.
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