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Home >> Mazda >> 2002 >> Tribute LX, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 529 (On-Board Diagnostic [Air Bag System)) >> DTC 03: Power Supply Of SAS Control Module >> Diagnostic procedure

Diagnostic procedure

WARNING: This page is about a different car, the 2005 Mazda MX-5 Miata. However, it is still accessible from the selected car via links, so may be relevant.
DTC 03 - DIAGNOSTIC PROCEDURE

STEP INSPECTION ACTION
1 INSPECT BATTERY 
  • Measure voltage of battery.
  • Is voltage more than 9 V? 
 Yes Go to next step.
No Battery is weak.
Inspect charge/discharge system.
(See BATTERY INSPECTION )
2 INSPECT WIRING HARNESS BETWEEN BATTERY AND FUSE BLOCK 
  • Remove fuse block without disconnecting connectors.
  • Turn ignition switch to ON position.
  • Measure voltage at terminals Y and AB of fuse block.
  • Is voltage of at least either terminal more than 9 V? 
 Yes Go to next step.
No Repair wiring harnesses.
3 INSPECT WIRING HARNESS BETWEEN FUSE BLOCK AND SAS CM 
WARNING:
  • Handling air bag system components improperly can accidentally deploy air bag modules, which may seriously injure you. Read AIR BAG SYSTEM SERVICE WARNINGS before handling air bag system components.

    (See AIR BAG SYSTEM SERVICE WARNINGS )

  • Turn ignition switch to LOCK position.
  • Disconnect negative battery cable and wait for more than 1 minute. 
  • Remove driver- and passenger-side quarter trims.
  • Disconnect driver- and passenger-side pre-tensioner seat belt connectors.
  • Remove dashboard.

    (See DASHBOARD REMOVAL/INSTALLATION )

  • Disconnect SAS CM connector.
  • Connect negative battery cable.
  • Turn ignition switch to ON position.
  • Measure voltage at SAS CM connector terminals Z and AB.
  • Is voltage of at least either terminal more than 9 V? 
 Yes Present malfunction diagnosis: 

Past malfunction diagnosis: 

  • Troubleshooting completed.
No Replace wiring harnesses.
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