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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1325 (Supplemental Inflatable Restraint System) >> Diagnostic Information and Procedures >> Diagnostic System Check - SIR >> Notes

Diagnostic System Check - SIR: Notes

WARNING: This page is about a different car, the 2004 Pontiac Vibe. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION: Refer to SIR Special Tool Caution in Cautions and Notices.
CAUTION: If the vehicle interior is exposed to moisture and becomes soaked up to the level of the sensing and diagnostic module (SDM), the SDM and SDM harness connector must be replaced. The SDM could be activated when powered, which could cause airbag deployment and result in personal injury.

These diagnostic procedures will help you to find and repair SIR system malfunctions. For best results, use the diagnostic tables and follow the sequence listed below:

  1. Refer to the diagnostic table as directed by the diagnostic system check - SIR. The diagnostic tables will help you to diagnose any SIR system malfunction. Bypassing these procedures may result in the following:
    • Extended Diagnostic Time
    • Incorrect Diagnosis
    • Incorrect Parts Replacement
  2. Repeat the diagnostic system check - SIR after you perform any repair or diagnostic procedure. This will verify that you correctly performed the repair. This will also ensure that no other malfunctions exist.