Code 45 - Left Front Solenoid Valve Fault

With ignition switch in RUN or START position, EBCM applies battery voltage to valve relay. EBCM will complete an internal self-check before providing ground to relay. When valve relay is energized, battery power is supplied to solenoid valves.

EBCM may command left front solenoid valve in brake pressure modulator to 3 different positions. Valve position is determined by amount of current which is allowed to flow through solenoid coil.

Code 45 will set when expected position of left front solenoid valve does not match commanded position from EBCM. Conditions which could cause Code 45 to set are damage to left front solenoid, open circuit No. 826 and short circuit to ground or battery on circuit No. 826.

1. Checks resistance of left front solenoid valve circuit.
2. Checks for short to ground in circuit No. 826.
3. Checks for short to battery voltage in circuit No. 826.
4. Checks for connector or wiring problems which can cause an intermittent condition.
5. Uses Tech 1 to check left front solenoid operation.
6. Determines whether code was set by an intermittent condition or an EBCM fault.
7. Determines if problem is caused by a faulty brake pressure modulator or faulty wiring.
8. Determines whether problem is an open in circuit No. 826 or a short from circuit No. 826 to circuit No. 1077.