PCM Failure SPI Communications

PCM FAILURE SPI COMMUNICATIONS

When Monitored
With the ignition on.

Set Condition
Serial communications inside the controller fail eight times during a run cycle.

Theory of Operation
Communications between microprocessors inside the Powertrain Control Module (PCM) are needed to operate the total system. If failure occurs, the solenoids and relays may not actuate properly.

Possible Causes
- PCM failure.