Dynamic Laser Cruise Control System
DTC P1616 COMMUNICATION ERROR FROM ECM TO DISTANCE CONTROL ECUDTC 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.
The ECM is the only component that has a function to record and output the DTCs in the dynamic laser 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.
Step 1:
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.