Dtc C1A52 Driving Support Ecu Communication Abnormal

Engine Hybrid System. Land Cruiser. Urj200, 202 Grj200 Vdj200
Cruise Control. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

INSPECTION PROCEDURE

CHECK FOR DTCs (RADAR CRUISE2)

REPLACE ECM

CHECK FOR DTCs (RADAR CRUISE2)

DTC C1A52 Driving Support ECU Communication Abnormal


DESCRIPTION

DTC C1A52 is stored when the ECM cannot recognize the driving support ECU assembly.

DTC No.
DTC Detection Condition
Trouble Area
C1A52
Approximately 17 seconds after the engine switch is turned on (IG), the ECM cannot recognize the driving support ECU assembly for approximately 1.3 seconds or more.
  1. ECM
  2. Driving support ECU assembly

INSPECTION PROCEDURE

NOTICE:
  1. When replacing the driving support ECU assembly, always replace it with a new one. If a driving support ECU assembly which was installed to another vehicle is used, the information stored in the driving support ECU assembly will not match the information from the vehicle. As a result, a DTC may be stored.
  2. First check the CAN communication system by following How to Proceed with Troubleshooting. After checking that there are no malfunctions in the CAN communication system, proceed with troubleshooting (Click here).
1.CHECK FOR DTCs (RADAR CRUISE2)

  1. Connect the GTS to the DLC3.

  1. Turn the engine switch on (IG).

  1. Clear the DTCs (Click here).

  1. Make sure that the DTC detection conditions are met.

    HINT:
    If the detection conditions are not met, the system cannot detect the malfunction.
    1. Turn the engine switch on (IG) and wait approximately 20 seconds or more.

  1. Enter the following menus: Powertrain / Radar Cruise2 / Trouble Codes.

  1. Check for DTCs (Click here).

    Result:
    Result
    		Proceed to
    DTC C1A52 is output
    		A
    DTC C1A52 is not output
    		B


B
USE SIMULATION METHOD TO CHECK
A


2.REPLACE ECM

  1. Replace the ECM.

    1. for 1UR-FE: Click here
    2. for 3UR-FE: Click here
    3. for 1VD-FTV: Click here

NEXT


3.CHECK FOR DTCs (RADAR CRUISE2)

  1. Connect the GTS to the DLC3.

  1. Turn the engine switch on (IG).

  1. Clear the DTCs (Click here).

  1. Make sure that the DTC detection conditions are met.

    HINT:
    If the detection conditions are not met, the system cannot detect the malfunction.
    1. Turn the engine switch on (IG) and wait approximately 20 seconds or more.

  1. Enter the following menus: Powertrain / Radar Cruise2 / Trouble Codes.

  1. Check for DTCs (Click here).

    Result:
    Result
    		Proceed to
    DTC C1A52 is output
    		A
    DTC C1A52 is not output
    		B


B
END (ECM WAS DEFECTIVE)
A

REPLACE DRIVING SUPPORT ECU ASSEMBLY (Click here)