Pre-Collision Safety System

DTC U0100 LOST COMMUNICATION WITH ECM/PCM "A"

CIRCUIT DESCRIPTION

DTC Detecting Condition:

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 laser light emission prohibiting signal, etc. to the distance control ECU.

DTC Detecting Condition:

The ECM sends signals such as A/T information signal, dynamic radar cruise control operation signal, brake operation demand signal, buzzer operation demand signal and low speed mode signal, etc. to the skid control ECU when the dynamic radar cruise control is in operation.

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 for communication. Therefore, if there are any malfunctions in the communication circuit, one or more DTCs in the CAN communication system is/are output.

GO TO CAN COMMUNICATION SYSTEM
Testing and Inspection