Ignition System No Start Test

Test Jumper:

60-way Connector:

NOTE: Before proceeding with this test make sure Testing For Spark At Coil has been performed. Failure to do this may lead to unnecessary diagnostic time and wrong test results.

Warning: Be sure to apply parking brake and/or block wheels before performing any test with the engine running.

1. Measure battery voltage. (Battery voltage must be at least 12.4 volts to perform test.)

2. Crank the engine for 5 seconds while monitoring the voltage at the coil positive (+) terminal. If the voltage remains near zero during the entire period of cranking, refer to On-Board Diagnostic checks, for PCM and auto shutdown relay, diagnosis

3. If voltage is near battery voltage and drops to zero after 1-2 seconds of cranking, check the distributor reference pickup and circuit.

4. If voltage remains at near battery voltage during the entire 5 seconds, turn the key OFF, disconnect the 60-way connector, and check for any pushed out or loose terminals.

5. Remove the connector to coil (+) and connect a jumper wire between battery (+) and coil (+).

6. Using the special jumper, momentarily ground terminal #19 of the 60-way connector. A spark should be generated when the ground is removed.

- If spark is generated, replace the PCM.

- If no spark is seen proceed to step # 7.

7. Use the special jumper to ground the coil (-) terminal directly.

- If spark is produced, inspect wiring harness for an open condition.

- If no spark is produced, replace the ignition coil.