P1616

CRUISE CONTROL: DYNAMIC RADAR CRUISE CONTROL SYSTEM: P1616: Communication Error from HV ECU to Distance Control ECU

DTC P1616 - Communication Error from HV ECU to Distance Control ECU

DTC U1101-728 - Lost Communication with HV ECU

DESCRIPTION

The hybrid vehicle control ECU 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 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 distance control ECU detects a communication error from the hybrid vehicle control ECU, it sends the malfunction signal back to the hybrid vehicle control ECU.






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
(a) Refer to "HOW TO PROCEED WITH TROUBLESHOOTING" in the CAN communication system How to Proceed With Troubleshooting.