C1254

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CIRCUIT DESCRIPTION
When EBCM/EBTCM relay is activated (turned on) voltage is supply to valve solenoids and pump motor. This DTC identifies a malfunction with the EBCM/EBTCM loosing ground or battery, or when battery is disconnected while running.

CONDITIONS FOR SETTING THE DTC
DTC C1254 is set when a running reset occurs. A running reset is when the vehicle is running and functions are normal then suddenly a loss of power or ground connection occurs to the EBCM/EBTCM.

ACTION TAKEN WHEN THE DTC SETS
^ A malfunction DTC is stored.
^ ABS/ETS/TCS is disabled.
^ ABS/ETS/TCS Indicators are turned on.
^ Magnetic Steering Variable Assist (MSVA) is disabled.
^ TIM goes into Autolearn mode after system recovery.

CONDITIONS FOR CLEARING THE DTC
^ Condition for DTC is no longer present and scan tool clear DTC function is used.
^ 100 ignition cycles have passed with no DTCs detected.

DIAGNOSTIC AIDS
^ Possible causes for DTC C1254 to set are:
- Running reset occurred.
- Loss of EBCM/EBTCM ground.
- Sudden drop in voltage.
- Poor or loose grounds connections.
- Poor or loose power connections.
- Battery disconnected due to corrosion or loose battery terminals.
- Internal EBCM/EBTCM malfunction.

^ It is very important that a thorough inspection of the wiring and connectors be performed. Failure to carefully and fully inspect wiring and connectors may result in misdiagnosis, causing part replacement with reappearance of the malfunction.
^ If an intermittent malfunction exists refer to Intermittents and Poor Connections Diagnosis in Diagnostic Aids.