Cranks but no start

Good evening,

The 12 and 55 are not codes. 12 is no distributor reference which is normal for key on, engine off.

55 is end of sequence.

42 is for the ASD relay signal to the PCM.

11 is for the crank sensor signal.

Roy

WHEN MONITORED
With the ignition key ON and battery voltage greater than 10 volts.

SET CONDITION
No voltage sensed at the Powertrain Control Module (PCM) when the Auto Shutdown (ASD) Relay is energized.

THEORY OF OPERATION
Whenever the PCM energizes the ASD relay, it checks the feedback circuit to ensure voltage is present at the ASD relay output.

- When the ASD relay is energized, the relay's contacts connect the fused B(+) circuit to the relay output circuit.

- The PCM is connected in parallel with the ASD relay output circuit, providing the PCM with a circuit to monitor the ASD relay output state.

If voltage is not present, a trouble code is set.

PROBABLE CAUSES
- ASD relay output circuit open
- Fused B(+) circuit open
- ASD relay
- Circuit in PCM

Check and make sure the contacts are clean and tight.

Roy

Sounds like a plan.

Roy

Can you get a code reader and check the codes again? The key off and on will not give all the information I need.

Roy

Code 11 is normal as I stated before.

Roy

When you crank the engine, does the tach move up a little? That will tell me if the crank sensor is sending a signal to the PCM.

If you have a scan tool, read live data and see if you see an RPM reading while cranking.

Yes, we are close to a PCM.

Roy