C1604

DTC C1604

Circuit Description
This DTC identifies a possible malfunction within the Electronic Brake Control Module (EBCM).

Conditions for Setting the DTC
DTC C1604 will set when a possible internal component/microprocessor problem may exist.

Action Taken When the DTC Sets
The solenoid relay opens, removing power from the pump motor and solenoids.
The ABS and DDRP are Disabled
^ DTC C1604 is stored.
^ The ABS warning lamp and brake warning lamp are turned ON.

Conditions for Clearing the DTC
^ If the conditions that set DTC C1604 are no longer present, the DTC may be cleared by using the proper scan tool.
^ The DTC that has not occurred in 100 drive cycles will be cleared from the history data.

Diagnostic Aids

Steps 1 - 5:

^ When DTC C1604 is displayed on the scan tool, it should be followed by 2 additional numbers, which should be documented along with any other DTCs that may be displayed.
^ Repair the low voltage, driveability, or other electrical complaints first, prior to performing DTC C1604.
^ Ensure the integrity of the connection between the EBCM and the Brake Pressure Modulator Valve (BPMV) is secure, tight, and free of corrosion, leaks, and/or damage.