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Home › Saab › 2001 › 9-3 Base, 2D Hatchback, Automatic › Repair and Diagnosis › External Pages › Different car › Section 4 (Engine Controls - Self-Diagnostics) › Fault Code Diagnosis › P1602: Internal Control Module - Malfunction › Fault Isolation Procedure

Fault Isolation Procedure

WARNING: This page is about a different car, the 2002 Saab 9-5 and 2001 Saab 9-5. However, it is still accessible from the selected car via links, so may be relevant.
  1. Changing components: Change ECM T7 control module. go to next step.
  2. Final check:
    • Turn the ignition switch to the ON position.
    • Clear the DTCs (ECM).
    • Turn the ignition switch to the OFF position.
    • Wait for 10 seconds.
    • Reset the limp-home mechanism.
    • Clear the DTCs in all systems.
    • Carry out a drive cycle: Drive the car at varying engine loads and engine RPM for 5 minutes.
    • Evaluate the drive cycle: Check that the DTC has not recurred.
    If the DTC has recurred, the fault is still present; check for any additional trouble codes.
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