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HOMESERVICE MANUALSISUZU2006ASCENDER S, 5.3 M, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 579 (IMMOBILIZER SYSTEM)DIAGNOSTIC INFORMATION AND PROCEDURESDTC P1630CIRCUIT/SYSTEM VERIFICATION
2006 Isuzu Ascender S, 5.3 M, 4WD

Circuit/System Verification

2006 Isuzu Ascender S, 5.3 M, 4WDSECTION Circuit/System Verification
WARNING: This page is about a different car, the 2009 GMC Envoy and 2009 Chevrolet TrailBlazer. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT: Because of normal system communications between the BCM and ECM/PCM, any theft deterrent B-codes must be diagnosed prior to the diagnosis of P-codes.

Perform the 10-Minute Immobilizer Relearn procedure. Refer to Immobilizer System Component Programming (North America, except Canada)  or Immobilizer System Component Programming (Canada, Europe, Middle East, and Asia) . The ECM/PCM should successfully complete the password learn and the vehicle should start.

  • If the ECM/PCM does not complete the learn or vehicle starting remains disabled, replace the ECM/PCM.
RENDER: 1.0x

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.