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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 274 (Engine Controls - Self-Diagnostics - 2.2L) >> Diagnostic Tests >> DTC P0601-P0607, P1600, P1621, P1627, P1680, P1681, P1683 Or P2610: ECM Memory >> Diagnostic Procedures

Diagnostic Procedures

WARNING: This page is about a different car, the 2003 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
  1. Perform diagnostic system check - engine controls. See DIAGNOSTIC SYSTEM CHECK - ENGINE CONTROLS  under SELF-DIAGNOSTIC SYSTEM. After performing diagnostic system check - engine controls, go to next step.
  2. Is DTC P0602, P0604, P0606, or P0607 set? If yes, go to next step. If no, go to step  5.
  3. Program the ECM. See ELECTRONIC CONTROL MODULE REPROGRAMMING  under PROGRAMMING. Does the DTC reset? If yes, go to next step. If no, go to step  6.
  4. Ensure that all tool connections are secure. Ensure the programming equipment is operating correctly. Ensure the correct software/calibration package is used. Attempt to program the ECM. See ELECTRONIC CONTROL MODULE REPROGRAMMING  under PROGRAMMING. Does the DTC reset? If yes, go to next step. If no, go to step  6.
  5. Turn ignition off. Replace ECM. Perform ECM relearn procedure. See ELECTRONIC CONTROL MODULE REPROGRAMMING  under PROGRAMMING. After replacing ECM, go to next step.
  6. Clear the DTCs with a scan tool. Turn ignition off for 30 seconds. Start engine. Did the DTC fail this ignition? If yes, go to step  2. If no, go to next step.
  7. With a scan tool, observe the stored information, Capture Info. Does the scan tool display any DTCs that you have not diagnosed? If yes, see DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no, system is okay.
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