DTC 63

DTC 63 BPM Valve Power Supply Malfunction






Circuit Description

The valve relay provides power to the ABS and TCS valve solenoids in the BPM valve. The valve relay, located in the EBTCM, is activated whenever the ignition switch is in the "RUN" position and no faults are present. Power is provided to the valves through the relay from circuit 1042 going into terminal 3 of the EBTCM. The valve relay remains engaged until the ignition is turned OFF or a failure is detected.

DTC will set when

DTC 63 can set with an open in the valve power circuit, a faulty Valve Relay or if the BPM becomes damaged.

Action Taken

1. Code set.
2. ABS/ TCS switched "OFF".
3. "ANTILOCK" indicator "ON".
4. "TRACTION DISABLED" message displayed.

Test Description

Test numbers refer to circled numbers on the diagnostic chart.

1. Checks for proper valve voltage.
2. Possible open in one or more of the individual valve power leads or the main lead to all the valves within the BPM.

Diagnostic Aids

It is very important that a thorough inspection of the wiring and connectors be performed, especially the grounds.