DTC 02

Solenoid Schematic:

Diagnostic Trouble Code (DTC) 2, Open Isolation Solenoid Or Electronic Brake Control Module (EBCM) Malfunction:

CIRCUIT DESCRIPTION
A Diagnostic Trouble Code (DTC) 2 relates to an open in the Antilock Pressure Valve (APV) Circuit. The Electronic Brake Control Module (EBCM) uses the isolation valve to maintain and increase pressure in the brake pipes during an antilock stop. An open in the solenoid winding or circuit prevents the EBCM from controlling the rear wheels when a speed decrease is detected.

TEST DESCRIPTION
- Check for continuity through the isolation solenoid winding.
- Check for a consistent DTC being set after clearing the memory.
- Check for corrosion or poor contact in the solenoid electrical terminals.
- Check the resistance of the solenoid after the terminal repair to see if it corrected the open condition.

DIAGNOSTIC AIDS
A DTC 2 will set If the 4-way connector is disconnected and the ignition switch is turned on or the 6-way connector is plugged in before the 4-way connector with the ignition switch on.

CAUTION: Do not pierce the electrical connectors, wires, seals, or insulation during testing. Doing so will break the seal and lead to corrosion and failure of the wiring and terminals.