PCM Failure SPI Communications

NAME OF CODE:
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