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Diagnostic Procedure

WARNING: This page is about a different car, the 2002 Pontiac Montana, 2002 Oldsmobile Silhouette, and 2002 Chevrolet Venture. 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. Using scan tool, verify that PCM is programmed with correct VIN. If VIN is not correct, go to next step. If VIN is correct, go to step  4.
  3. Using scan tool, program correct VIN into PCM. Go to step  8.
  4. If IPC was replaced, go to next step. If IPC was not replaced, go to step  6.
  5. Using scan tool, verify IPC is programed with correct VIN. If VIN is correct, go to step  7. If VIN is not correct, go to next step
  6. Using scan tool, follow instructions under IPC SPECIAL FUNCTIONS to program IPC. Go to step  8.
  7. Replace SDM. See SENSING & DIAGNOSTIC MODULE (SDM)  under REMOVAL & INSTALLATION. Go to next step.
  8. Reconnect all SIR components. Using scan tool, clear all DTC's. Road test vehicle, then check for DTC's. If DTC's are retrieved, go to step  2. If no DTC's are retrieved, system is normal.
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