Dynamic Radar Cruise Control System
DTC P1631 Communication Error from HV ECU to Skid Control ECUDTC U0122-732 Lost Communication with HV ECU
DESCRIPTION
DTC Detection Condition:
The hybrid vehicle control ECU sends signals such as A/T information signals, dynamic radar cruise control operation signals, brake operation demand signals, buzzer operation demand signals and low speed mode signals, etc. to the skid control ECU when the dynamic radar cruise control is in operation. The hybrid vehicle control ECU is the only component that has a function to record and output the DTCs in the dynamic radar cruise control system. Therefore if the skid control ECU detects a communication error from the hybrid vehicle control ECU, it sends the malfunction signal back to the hybrid vehicle control ECU.
Step 1:
INSPECTION PROCEDURE
HINT: This circuit uses CAN communication. Therefore, if there are any malfunctions in the communication circuit, one or more DTCs in the CAN communication system are output.