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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 P1682: Driver 5 - Line 2 >> 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. Observe the Freeze Frame/Failure Records data for this DTC. Turn ignition off for 30 seconds. Turn ignition on, with engine off for 10 seconds. Does the DTC fail this ignition? If yes, go to next step. If no, problem is intermittent. See INTERMITTENTS in TROUBLE SHOOTING - NO CODES - 2.2L & 3.0L VUE article.
  3. With a test light connected to ground, probe both sides of the ETC fuse. Does the test light illuminate on both sides of the fuse? If yes, go to step  5. If no, go to next step.
  4. Does the test light illuminate on one side of the fuse? If yes, go to step  6. If no, go to next step.
  5. Turn ignition off. Disconnect ECM. Test both ETC ignition circuits for an open or for a high resistance. Did you find and correct the condition? If yes, go to step  9. If no, go to step  7.
  6. Turn ignition off. Disconnect ECM. Test both ETC ignition circuits for a short to ground. Replace fuse, if necessary. Did you find and correct the condition? If yes, go to step  9. If no, go to next step.
  7. Test for an intermittent and for a poor connection at ECM. Did you find and correct the condition? If yes, go to step  9. If no, go to next step.
  8. Turn ignition off. Replace ECM. Perform ECM relearn procedure. See ELECTRONIC CONTROL MODULE REPROGRAMMING  under PROGRAMMING. After replacing ECM, go to next step.
  9. Using scan tool, clear DTCs. Turn ignition off for 30 seconds. Operate vehicle within the conditions for running the DTC. See CONDITIONS FOR RUNNING DTC . You may also operate vehicle within the conditions observed from the Freeze Frame/Failure Records. Did the DTC fail this ignition? If yes, go to step  2. If no, go to next step.
  10. 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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