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Home >> Saturn >> 2002 >> SC2 Standard, MP2 >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Control System - Basic Diagnostic Procedures >> No-Start Diagnosis >> No Start - Engine Cranks Okay (3.8L) >> Fuel Injector Circuit (VIN K - Camaro, Firebird, Impala & Monte Carlo)

Fuel Injector Circuit (VIN K - Camaro, Firebird, Impala & Monte Carlo)

  1. If diagnostic system check has already been performed, go to next step. If diagnostic system check has not been performed, go to DIAGNOSTIC SYSTEM CHECK - ENGINE CONTROLS in appropriate SELF-DIAGNOSTICS article.
  2. Are any fuel injector DTCs set? If yes, diagnose DTC P0201-P0206. See appropriate SELF-DIAGNOSTICS article. If no, go to next step.
  3. Inspect fuel injector fuse (located in underhood fuse/relay block). Is fuel injector fuse open? If yes, go to next step. If no, go to step  6.
  4. Turn ignition off. Disconnect the fuel injector multi-way harness connector. Using a test light connected to battery voltage, probe the ignition 1 voltage supply circuit of the fuel injector (fuse side). See WIRING DIAGRAMS article. Does the test light illuminate? If yes, go to step  9. If no, go to next step.
  5. Turn ignition on, with engine off. Does the test light illuminate? If yes, go to step  13. If no, go to step  8.
  6. Turn ignition off. Disconnect fuel injector multi-way harness connector. Turn ignition on, with engine off. Probe the ignition 1 voltage supply circuit of the fuel injector with a test light connected to a good ground. Does the test light illuminate? If yes, go to next step. If no, go to step  10.
  7. Test for continuity between the ignition 1 voltage supply terminal and a fuel injector terminal, at the fuel injector multi-way harness connector. Does DVOM display OL? If yes, go to step  11. If no, go to step  12.
  8. Test the ignition 1 voltage supply circuit of the fuel injector, between the multi-way harness connector and the fuel injectors for a short to ground. Did you find and correct the condition? If yes, go to step  14. If no, problem is intermittent.
  9. Repair the short to ground in the ignition 1 voltage supply circuit of the fuel injector. After repairs, go to step  14.
  10. Repair the open in the ignition 1 voltage supply circuit between the underhood electrical center and splice S109. See WIRING DIAGRAMS article. After repairs, go to step  14.
  11. Repair the ignition 1 voltage supply circuit of the fuel injectors for an open and/or high resistance between the multi-way connector and splice. After repairs, go to step  14.
  12. Repair the poor connection at the multi-way connector. After repairs, go to step  14.
  13. Repair short to PCM ground in the ignition 1 voltage supply circuit of the fuel injector. After repairs, go to next step.
  14. Operate the system in order to verify the repair. Did you correct the condition? If yes, system is okay. If no, go to step  3.
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