• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
• | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
• | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
The isolation and prime valve solenoid circuits are supplied with battery power when ignition is in the ON position. The electronic brake control module (EBCM) controls the valve functions by grounding the circuit when necessary.
• | Ignition ON. |
• | The DTC can be set after system initialization. |
The DTC will set when the EBCM detects a short to B+, short to ground, or an open/high resistance in the solenoid coil or circuit internal to the EBCM only.
If equipped, the following actions occur:
• | The EBCM disables the ABS/traction control system (TCS)/vehicle stability enhancement system (VSES)/dynamic rear proportion (DRP) for the duration of the ignition cycle. |
• | The ABS indicator illuminates. |
• | The Stability Off indicator illuminates. |
• | The red BRAKE warning indicator could illuminate. |
The condition for the DTC is no longer present.
The solenoid valve circuit and the solenoid coil are internal to the EBCM. No part of the solenoid circuit is diagnosable external to the EBCM. The DTC sets when there is a malfunction in the solenoid circuit internal to the EBCM only.
Antilock Brake System Schematics
Control Module References for scan tool information
If the DTC or DTCs is set, program the EBCM refer to Control Module References . If the DTC or DTCs resets, replace the EBCM.
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for EBCM replacement, setup, and programming