Diagnostic Aids

Enter this test only when all steps under QUICK TEST have been successfully completed and engine still does not start or if directed here from another test or chart. This test is only intended to diagnose the following:

• Ignition Control Module (ICM).
• Harness circuits; IGN GND and VPWR.
• PCM.

To prevent replacement of good components, be aware following non-engine control related areas and components may be cause of problem:

• Fuel quality and quantity.
• Engine mechanical components.
• Starter and battery circuits.
• Ignition coil.

1. Starting System Check
   
   Ensure fuel pump inertia switch is closed (button pushed in). Try to start engine. If engine does not crank, check vehicle starting and charging systems. If engine cranks, go to next step.
2. Check MIL During Cranking
   
   Turn ignition on. MIL should illuminate with key on. If MIL light does not illuminate with key on, go to TEST NB . Crank engine. If MIL turns off during engine cranking, CMP sensor is okay. Go to next step. If MIL stays on during engine cranking, go to TEST NB .
3. Perform Quick Test
   
   Perform QUICK TEST . If any Diagnostic Trouble Codes (DTC) are retrieved, diagnose DTCs as necessary and recheck for no-start condition. See DIAGNOSTIC TROUBLE CODE DEFINITION CHARTS . If no DTCs are retrieved, go to next step.
4. Check For Spark At Spark Plugs
   
   Disconnect any spark plug wire. Connect spark tester between spark plug wire and ground. Crank engine while checking for spark. If spark is okay, go to next step. If spark is not okay, go to TEST JA .
5. Check Fuel Delivery System
   
   Check fuel delivery volume. See TEST HC . If fuel delivery is within specification, go to next step. If fuel delivery is insufficient, repair as necessary.
6. Check Basic Engine Condition
   
   Check engine compression, camshaft, valve train and timing belt. Repair as necessary. If engine mechanical condition is okay, go to next step.
7. Check Air Intake System
   
   Perform intake air system and by-pass air control system diagnostic procedure. See TEST HU . Repair as necessary. If by-pass air control system and intake air control systems are okay, go to TROUBLE SHOOTING - NO CODES - VILLAGER article.