DTC    P1615    Communication Error from Distance Control ECU to ECM

DTC    U1101    Lost Communication With Distance Control ECU

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DESCRIPTION

The distance control ECU receives information about the area in front of the vehicle from the millimeter wave radar sensor and then sends a brake control demand signal (deceleration demand) and diagnosis signals, such as millimeter wave radar sensor grime signals or millimeter wave radar sensor malfunction signals, to the ECM.

DTC No.
DTC Detection Condition
Trouble Area
P1615
While dynamic radar cruise control is either preparing for operation or operating, if communication data from distance control ECU is logically inconsistent for certain amount of time or more, ECM records logical error code
  1. Communication circuit
  2. Distance control ECU (Cruise control ECU)
  3. ECM
U1101
While dynamic radar cruise control is either preparing for operation or operating, if communication data from distance control ECU is invalid for certain amount of time or more, ECM records communication cut off code
  1. Communication circuit
  2. Distance control ECU (Cruise control ECU)
  3. ECM

INSPECTION PROCEDURE

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



1.GO TO CAN COMMUNICATION SYSTEM
    Refer to how to proceed with troubleshooting (Click here).