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Home >> Isuzu >> 2003 >> Rodeo LS, 2.2 D >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics - 2.2L >> Diagnostic Tests >> DTC P1627: Powertrain Control Module A/D Conversion Malfunction >> Diagnostic Procedure
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Diagnostic Procedure

  1. Perform ON-BOARD DIAGNOSTIC II SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM. After performing OBD-II system check, go to next step.
  2. Turn ignition on with engine off. Using scan tool, read and record FAILURE RECORDS data. Clear DTCs. Operate vehicle within FAILURE RECORDS data. If scan tool displays DTC P1627 RAN AND PASSED this ignition, check for intermittent problem. See DIAGNOSTIC AIDS  . If scan tool does not display DTC P1627 RAN AND PASSED this ignition, go to next step.
  3. Check suspect 5-volt reference circuits for open, short to ground or short to voltage. See WIRING DIAGRAMS  . If problem is found, repair as necessary. After repairs are complete, see VERIFYING VEHICLE REPAIR  under SELF-DIAGNOSTIC SYSTEM. If no problem is found, go to next step.
  4. Replace and reprogram PCM. See POWERTRAIN CONTROL MODULE REPLACEMENT  under POWERTRAIN CONTROL MODULE. After repairs are complete, see VERIFYING VEHICLE REPAIR  under SELF-DIAGNOSTIC SYSTEM.
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