Normal Operation and Fault Conditions

The CCM is an internal component of the PCM. With the ignition ON, the CCM sends messages to the ABS module over the HS-CAN. If the ABS module does not receive these messages within the specified time frame, the module sets a DTC. This can be due to a CCM failure, a circuit failure on the HS-CAN or an excessive load on the network. For information on the messages sent to the ABS module by the CCM, refer to the Description and Operation in ANTI-LOCK BRAKE SYSTEM (ABS) AND STABILITY CONTROL .

PPT R ABS MODULE DTC FAULT TRIGGER CONDITIONS

DTC	Description	Fault Trigger Conditions
U0104:00	Lost Communication With Cruise Control Module: No Sub Type Information	Sets when the ABS module does not receive any messages from the CCM.
U0104:87	Lost Communication With Cruise Control Module: Missing Message	Sets when the ABS module detects any of the following CCM messages are missing: adaptive cruise control status, adaptive cruise control deceleration request, adaptive cruise control pre-charge request, collision mitigation by braking status, collision mitigation by braking deceleration request, collision mitigation by braking pre-charge request.
U0405:66	Invalid Data Received From Cruise Control Module: Signal Has Too Many Transitions/Events	Sets when the ABS module detects the collision mitigation requests from the CCM are either too numerous or too long.
U0405:68	Invalid Data Received From Cruise Control Module: Event Information	Sets when the ABS module receives an invalid collision mitigation by braking pre-charge request from the CCM.
U0405:81	Invalid Data Received From Cruise Control Module: Invalid Serial Data Received	Sets when the ABS module detects the adaptive cruise control deceleration requests from the CCM are either too numerous or too long. This DTC also sets if the speed difference while braking exceeds a predetermined threshold.