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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 22: Driver-Side Air Bag Sensor System (Internal Circuit Abnormal) >> 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 22

STEP INSPECTION ACTION
1
  • Is vehicle equipped with side air bag?
 Yes Go to the next step.
No Go to Step 7.
2
  • Turn ignition switch to ON position and wait for 60 minutes or more. 
  • Is DTC 22 indicated?
 Yes Go to the next step.
No Troubleshooting completed.
3 INSPECT WIRING HARNESS BETWEEN DRIVER-SIDE SIDE AIR BAG SENSOR AND SAS CONTROL MODULE 
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 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.
  • Remove driver- and passenger-side B-pillar lower trims.
  • Disconnect driver- and passenger-side pre-tensioner seat belt connectors.
  • Turn up floor covering.
  • Disconnect all SAS control module connector.
  • Disconnect driver-side side air bag sensor connector.
  • Inspect following wiring harness between SAS control module and driver-side side air bag sensor terminals (harness-side) for short to ground, short to power supply, and open circuit:
    • IB and A
    • 1D and B
    • 1F and C
    • 1E and D
  • Are wiring harnesses normal?
 Yes Present malfunction diagnosis: 
  • Go to the next step.

Past malfunction diagnosis: 
No Replace wiring harnesses.
4 INSPECT GROUND CIRCUIT IN SAS CONTROL MODULE 
  • Is there continuity between SAS control module terminals 1F and 2Q?
 Yes Go to the next step.
No Replace SAS control module. (See SAS CONTROL MODULE REMOVAL/INSTALLATION [STANDARD DEPLOYMENT CONTROL SYSTEM] )
5 INSPECT POWER SUPPLY CIRCUIT OF DRIVER-SIDE SIDE AIR BAG SENSOR 
  • Connect all SAS control module connectors.
  • Connect clock spring connector.
  • Connect passenger-side air bag module connector.
  • Connect driver- and passenger-side side air bag module connectors.
  • Connect driver- and passenger-side pre-tensioner seat belt connectors.
  • Connect negative battery cable.
  • Turn ignition switch to ON position.
  • Measure voltage at driver-side side air bag sensor terminal A.
  • Is voltage approximately 5 V  ?
 Yes Replace driver-side side air bag sensor, then go to the next step. (See SIDE AIR BAG SENSOR REMOVAL/INSTALLATION [STANDARD DEPLOYMENT CONTROL SYSTEM] )
No Replace SAS control module. (See SAS CONTROL MODULE REMOVAL/INSTALLATION [STANDARD DEPLOYMENT CONTROL SYSTEM] )
6 VERIFY WHETHER SAS CONTROL MODULE IS MALFUNCTIONING OR NOT 
  • Disconnect negative battery cable.
  • Connect driver-side side air bag sensor connector.
  • Connect negative battery cable.
  • Turn ignition switch to ON position.
  • Is DTC 22 indicated?
 Yes Replace SAS control module. (See SAS CONTROL MODULE REMOVAL/INSTALLATION [STANDARD DEPLOYMENT CONTROL SYSTEM] )
No Troubleshooting completed.
7 VERIFY THAT SAS CONTROL MODULE TERMINAL 2AA IS GROUNDED 
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 column cover.
  • Disconnect clock spring connector.
  • Remove glove compartment.
  • Disconnect passenger-side air bag module connector.
  • Remove driver- and passenger-side B-pillar lower trims.
  • Disconnect driver- and passenger side pre-tensioner seat belt connectors.
  • Turn up floor covering.
  • Disconnect all SAS control module connectors.
  • Inspect wiring harness between SAS control module terminal 2AA and ground for following.
    • Short to power supply
    • Open circuit
  • Is wiring harness normal?
 Yes Present malfunction diagnosis: 
Past malfunction diagnosis: 
  • Troubleshooting completed.
No Replace wiring harness.
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