Diagnostic Code Entered On: Wed Oct 06, 2010 11:00 pm
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Diagnostic Trouble Code Description:
Vacuum Pump Relay Control Circuit High Voltage
Possible Sensor Faults
ECM
Possible Related Diagnostic Trouble Codes
DTC P258A-P258D
Circuit / System Description
The engine control module (ECM) monitors the control circuit of the brake booster pump relay. The ECM supplies ground through the pump relay control circuit which then supplies B+ voltage to actuate the brake booster pump. B+ voltage is supplied at all times to the coil side of the pump relay.
