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Home › Chevrolet › 2002 › Prizm Base, Standard › Repair and Diagnosis › Engine Performance › System › Engine Controls - System & Component Testing › Fuel System › Fuel Injector Coil Test - Engine Coolant Temperature Is 50-95°F › Diagnostic Procedure

Diagnostic Procedure

  1. Perform Diagnostic System Check - Engine Controls. See DIAGNOSTIC SYSTEM CHECK - ENGINE CONTROLS under SELF-DIAGNOSTIC SYSTEM in appropriate SELF-DIAGNOSTICS article. After performing diagnostic system check, go to next step.
  2. Using scan tool, check engine coolant temperature. Is the engine coolant temperature 50-95°F (10-35°C)? If yes, go to next step. If no, see FUEL INJECTOR COIL TEST - ENGINE COOLANT TEMPERATURE IS NOT 50-95°F  .
  3. Turn ignition off. Relieve fuel pressure. Access fuel injector connectors as required. Install Fuel Injector Tester (J-39021) to positive battery voltage and ground. Set amperage supply selector switch on tester to COIL TEST 0.5 AMP position. Connect DVOM to fuel injector tester. Set DVOM to tenths scale (0.0). Install fuel injector tester on fuel injector. Press PUSH TO START TEST button on tester. Observe voltage reading on DVOM. Record lowest voltage reading observed after first second of test. Repeat for each fuel injector. Did any fuel injector have an erratic voltage reading or a voltage reading outside 6.7-7.7 volts? If yes, go to next step. If no, see FUEL INJECTOR BALANCE TEST  .
  4. Replace faulty fuel injector(s). After replacing fuel injector, see FUEL INJECTOR BALANCE TEST  .
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