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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 457 (Supplemental Inflatable Restraint System) >> Diagnostic Tests >> DTC B1000: Internal SDM Malfunction >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2003 Pontiac Grand Prix. However, it is still accessible from the selected car via links, so may be relevant.
  1. If SIR diagnostic system check has been performed, go to next step. If SIR diagnostic system check has not been performed, go to SIR DIAGNOSTIC SYSTEM CHECK .
  2. Replace SDM. See SENSING & DIAGNOSTIC MODULE (SDM)  under REMOVAL & INSTALLATION. Go to next step.
  3. Road test vehicle, then check for SIR DTC's. If DTC B1000 resets, go to step  2. If DTC B1000 does not reset, system is okay. Go to SIR DIAGNOSTIC SYSTEM CHECK .
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