Engine Cranks But Does Not Run

Refer to Engine Controls Schematics Power, Ground, CMP, KS, and CKP

Diagnostic Chart (Part 1 Of 3):

Diagnostic Chart (Part 2 Of 3):

Diagnostic Chart (Part 3 Of 3):

CIRCUIT DESCRIPTION
This engine is equipped with a distributorless ignition system called the Electronic Ignition (EI) system. The primary circuit of the El system consists of 2 separate ignition coils, an electronic ignition control module (PCM) and a Crankshaft Position (CKP) sensor as well as the related connecting wires and the ignition control (IC) portion of the Powertrain Control Module (PCM). Each secondary circuit consists of the secondary winding of the coil, spark plug wires, and the spark plugs.

IMPORTANT: The Camshaft Position (CMP) sensor is only used for a misfire detection and is not part of the ignition system.

DIAGNOSTIC AIDS
^ A small amount of resistance in the battery positive voltage circuit to the PCM may cause a no start. Test the battery positive voltage circuit for excessive resistance or corrosion. Refer to wiring Repairs in Diagrams.
^ The PCM grounds will cause a NO START only if all of them are not making a good connection. Refer to Testing for Intermittent and Poor Connections in Diagrams.
^ Test/Inspect the Throttle Position (TP) sensor for the following conditions:
- Binding Sticking
- Intermittently shorted
- Intermittently open
- Refer to DTC P0105 Manifold Absolute Pressure (MAP) Sensor Performance/Range P0105
^ The ECT may be skewed within specifications and may not set a code. On a cold vehicle the ECT and IAT should be 3°C or 5°F of each other. On a HOT vehicle, let the engine cool to ambient temperature then test the ECT.
^ The MAP sensor may be skewed within specifications and not set a code. Refer to DTC P0105 Manifold Absolute Pressure (MAP) Sensor Performance/Range for diagnostic testing. P0105
^ If the CKP sensor is loose it may cause an intermitted NO START by moving away from the reluctor wheel. Inspect the sensor and matting surface for being clean and tight.

TEST DESCRIPTION
The numbers below refer to the step numbers on the diagnostic table.
4. Verify that the fuel pump runs by removing the fuel cap and listening, or by feeling the fuel rail or fuel lines on key up.
7. Repair the cause of the malfunctioning Spark plugs before replacing.
8. Inspect for basic engine malfunction like low compression, burnt valves, a worn timing chain and worn gears, etc.
20. Any time the CKP sensor is removed the Crankshaft Position Variation learn procedure must be performed.
23. The replacement PCM must be reprogrammed and the Crankshaft Position System Variation Learn procedure must be performed.