DTC 54

Code 54 - M/C Solenoid Circuit High:

Wiring Diagram for Code 54 - M/C Solenoid Circuit High:

CODE 54 - M/C SOLENOID CIRCUIT HIGH


Circuit Description:

Code 54 will be set if there is constant high voltage at ECM Term. "18".

A shorted solenoid or a wiring short to 12V would cause the solenoid to remain in the full rich position. This would cause excessive fuel consumption, and excessive exhaust odor.


Test Description:

1. Checks the M/C solenoid resistance to determine if the fault is in the solenoid or ECM harness/ECM. A normal solenoid has about 18 to 32 ohms of resistance.


2. Checks to see if reason for high voltage to Term. "18" is a faulty ECM or a short to 12V on that wire. If the test light to ground lights at the M/C solenoid test lead with both ends of harness disconnected, there is a short to 12V in the wire.