C0042

DTC C0042 Circuit Diagram:

CIRCUIT DESCRIPTION
When the RF dump solenoid is needed the Electronic Brake Control Module (EBCM) will ground the solenoid circuit to energize the coil within the solenoid. This will open the dump valve by the magnetic force created by the solenoid coil.

CONDITIONS FOR SETTING DTC
- ABS bulb check complete
- Low voltage on EBCM solenoid driver circuit when expected to be high (solenoid not energized)

ACTION TAKEN WHEN DTC IS SET
- ANTILOCK indicator lamp is illuminated
- Antilock Brake System (ABS) is disabled

NOTE: DTC C0042 is an Ignition Latched DTC which indicates the above is true until the ignition is turned to OFF (even if the cause of the DTC is intermittent).

DIAGNOSTIC AIDS
DTC C0042 is usually set by an open solenoid coil within the EBCM. The RF dump solenoid is located within the Brake Pressure Modulator Valve (BPMV) and is not serviceable. If the test does not repair the DTC, the EBCM must be replaced.

NOTE: If DTC C0042 is set with other DTCs, check for a poor EBCM ground or poor EBCM power feed.

DTC CHART TEST DESCRIPTION

DTC C0042 Diagnostic Chart:

NOTE: Number(s) below refer to number(s) on the diagnostic chart.

2. Inspect EBCM 2-way harness connector for damage.
3. Check EBCM power and ground circuits.