Communication Error from ECM to Distance Control ECU

CRUISE CONTROL: DYNAMIC RADAR CRUISE CONTROL SYSTEM: P1616, U0100: Communication Error from ECM to Distance Control ECU
U0100 - Lost Communication with ECM / PCM "A"

DESCRIPTION

The ECM receives signals from each sensor and ECU, then sends signals such as the A/T signal, cruise control operation signal, low speed operation signal, brake control operation signal and radar light emission prohibiting signal, etc. to the distance control ECU. The ECM is the only component that has a function to record and output the DTCs in the dynamic radar cruise control system. Therefore if the distance control ECU detects a communication error from the ECM, it sends the malfunction signal back to the ECM.





INSPECTION PROCEDURE

HINT
This circuit uses CAN communication. Therefore, if there are any malfunction in the communication circuit, one or more DTCs in the CAN communication system are output.

1. GO TO CAN COMMUNICATION SYSTEM

Refer to how to proceed with troubleshooting How to Proceed With Troubleshooting.