DTC A077: Left Front Solenoid Circuit Shorted to Battery

LEFT FRONT SOLENOID CIRCUIT SHORTED TO BATTERY





Circuit Description
This DTC identifies a solenoid that cannot be energized due to a short to voltage in its driver circuitry. These malfunctions can affect ABS operation since the flow of brake fluid to the caliper cannot be stopped, making ABS operation for that channel impossible.

Diagnosis
This test identifies a situation in which a short to battery in the driving circuitry for the left front solenoid prevents energizing the solenoid.

Cause(s)
- The solenoid circuitry is shorted to the battery.
- The solenoid is shorted to the battery internally.
- The solenoid is defective (low coil resistance).
- The electronic brake control module (EBCM) is malfunctioning.

Fail Action
This is a critical operational fault. The ABS is disabled and the ABS warning lamp is turned on. The system commands a rehome to ensure that all motors are in the home position.

Test Description
The number(s) below refer to step(s) on the diagnostic table.
1. This checks for a solenoid that is internally shorted to voltage.
2. This checks for a solenoid that is not within proper resistance values.
3. This step indicates if a short to voltage exists in the solenoid control circuitry.
4. This step checks for a possible intermittent malfunction in the solenoid control circuitry due to connector damage.

Diagnostic Aids
An intermittent malfunction may be caused by a poor connection, wire insulation that has been rubbed through, or a wire that is broken inside the insulation.
Check the frequency of the malfunction by using the enhanced diagnostic feature of the scan tool as described in "Scan Tool Diagnostics." Scan Tool Diagnostics
Any circuitry that is suspected of causing the intermittent complaint should be thoroughly checked for backed out terminals, improper mating, broken locks, improperly formed or damaged terminals, poor terminal-to-wiring connections, or physical damage to the wiring harness.





DTC A077 - Left Front Solenoid Circuit Shorted to Battery