Self Diagnostics: Notes
NOTE:
Electronic brake control module (EBCM) turns valve relay off when a diagnostic trouble code (DTC) is set. Scan tool will indicate that valve relay is off when it is used to monitor data list. This is normal and should not be considered a malfunction. EBCM performs system self-diagnostics and can detect and often isolate system malfunctions. When it detects a malfunction EBCM sets a DTC that represents malfunction's it turns on ABS and/or TCS indicators in most instances, and may disable ABS and/or TCS functions, as necessary, for duration of ignition cycle. Once each ignition cycle, EBCM performs an automatic test when vehicle reaches 2.75 kph (1.7 mph). In course of this test, system cycles each valve solenoid and pump motor, along with necessary relays, to check component operation. If EBCM detects any malfunctions, it will set a DTC as described above.