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Home >> Mazda >> 2002 >> Tribute LX, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 419 (On-Board Diagnostic (Air Bag System - Standard Deployment Control System)) >> DTC 12: Passenger-Side Pre-TENSIONER Seat Belt System >> Diagnostic procedure

Diagnostic procedure

WARNING: This page is about a different car, the 2005 Mazda MPV. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSTIC PROCEDURE - DTC 12

STEP INSPECTION ACTION
1 INSPECT PASSENGER-SIDE PRE-TENSIONER SEAT BELT CONNECTOR 
WARNING:
  • Handling air bag system components improperly can accidentally deploy air bag modules and pre-tensioner seat belts, which may seriously injure you. Read the service warnings and cautions before handling air bag system components.

    (See SERVICE WARNINGS .)

    (See SERVICE CAUTIONS .)

  • Turn ignition switch to LOCK position.
  • Disconnect negative battery cable and wait for 1 min or more  .
  • Remove passenger-side B-pillar lower trim.
  • Disconnect passenger-side pre-tensioner seat belt connector.
  • Is there cracking or chipping in passenger-side pre-tensioner seat belt connector?
 Yes Replace wiring harness.
No Present malfunction diagnosis: 
  • Go to the next step.

Past malfunction diagnosis: 
  • Go to Step 3.
2 VERIFY WHETHER MALFUNCTION IS IN PASSENGER-SIDE PRE-TENSIONER SEAT BELT OR OTHER PARTS 
  • Connect leads of SST  (Fuel and thermometer checker) or apply 2 ohms  resistor to passenger-side pre-tensioner seat belt terminals A and B.
  • Set resistance of SST  (Fuel and thermometer checker) to 2 ohms  .
  • Connect negative battery cable.
  • Turn ignition switch to ON position.
  • Is DTC 12 indicated?
 Yes Go to the next step.
No Replace passenger-side pre-tensioner seat belt.
3 INSPECT WIRING HARNESS BETWEEN PASSENGER-SIDE PRE-TENSIONER SEAT BELT AND SAS CONTROL MODULE 
  • Turn ignition switch to LOCK position.
  • Disconnect negative battery cable and wait for 1 min or more  .
  • Remove column cover.
  • Disconnect clock spring connector.
  • Remove glove compartment.
  • Disconnect passenger-side air bag module connector.
  • Disconnect driver- and passenger-side side air bag module connectors. (Vehicle with side air bag)
  • Remove driver-side B-pillar lower trim.
  • Disconnect driver-side pre-tensioner seat belt connector.
  • Turn up floor covering.
  • Disconnect all SAS control module connectors.
  • Inspect following wiring harness between SAS control module and driver-side pre-tensioner seat belt terminals (harness-side) for short to ground, short to power supply, and open circuit:
    • 31 and A
    • 3K and B
  • Are wiring harnesses normal?
 Yes Present malfunction diagnosis: 
  • Replace SAS control module.

Past malfunction diagnosis: 
  • Replace passenger-side pre-tensioner seat belt.
No Replace wiring harness.
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