Pinpoint Test A: C2005:78, C2006:78: Notes

WARNING: This page is about a different car, the 2021 Ford F-150. However, it is still accessible from the selected car via links, so may be relevant.

Refer to VEHICLE DYNAMIC SYSTEMS for schematic and connector information.

Normal Operation and Fault Conditions

The ABS module measures the current draw of both actuator motors during each parking brake apply request. Current draw measurement for these 2 Diagnostic Trouble Codes (DTCs) starts when the caliper piston and brake pad start moving and stops when the brake pad contacts the brake disc, this is known as free run. If the free run current draw exceeds the programmed limit, the ABS module sets a DTC. This is most likely caused by high mechanical resistance in the actuator or motor, a shorted motor, a blocked motor or a seized motor.

REFER to: Parking Brake - System Operation and Component Description .

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Condition
ABS C2005:78	Right Actuator: Alignment Or Adjustment Incorrect	This DTC sets when actuator state was set to unknown due to unexpected powerdown or invalid stored data and at least one actuator state is detected as unknown.
ABS C2006:78	Left Actuator: Alignment Or Adjustment Incorrect	This DTC sets when actuator state was set to unknown due to unexpected powerdown or invalid stored data and at least one actuator state is detected as unknown.

Possible Sources

Unexpected powerdown