Dtc U0100 Lost Communication With Ecm / Pcm A

Vehicle Interior. Land Cruiser. Urj200, 202 Grj200 Vdj200
Pre-Crash Safety. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

INSPECTION PROCEDURE

CHECK DTC (CAN COMMUNICATION SYSTEM)

DTC U0100 Lost Communication with ECM / PCM "A"

DTC U0125 Lost Communication with Yaw Rate Sensor Module

DTC U0126 Lost Communication with Steering Angle Sensor Module

DTC U0129 Lost Communication with Brake System Control Module

DTC U0235 Lost Communication with Cruise Control Front Distance Range Sensor

DTC U023A Lost Communication with Front Camera Module

DTC U1002 Lost Communication with Gateway Module

DTC U1104 Lost Communication with Driving Support ECU


DESCRIPTION


DTC Code
DTC Detection Item
DTC Detection Condition
Inspection Area
U0100
ECM communication error.
When driving the vehicle at a speed of 5 km/h or more, a communication error between the ECM and the driving support ECU assembly is detected for approximately 5 seconds.
  1. CAN communication system
  2. Driving support ECU assembly
  3. ECM
U0125
Lost Communication with Yaw Rate Sensor Module
When the engine switch is on (IG), a communication error between the yaw rate sensor and the driving support ECU assembly is detected for approximately 1 second.
  1. CAN communication system
  2. Airbag sensor assembly
  3. Driving support ECU assembly
U0126
Lost Communication with Steering Angle Sensor Module
When the engine switch is on (IG), a communication error between the steering sensor and the driving support ECU assembly is detected for approximately 4 seconds.
  1. CAN communication system
  2. Spiral with sensor cable sub-assembly
  3. Driving support ECU assembly
U0129
Lost Communication with Brake System Control Module
When the engine switch is on (IG), a communication error between the master cylinder solenoid (skid control ECU) and the driving support ECU assembly is detected for approximately 3 seconds.
  1. CAN communication system
  2. Master cylinder solenoid (skid control ECU)
  3. Driving support ECU assembly
U0235
Lost Communication with Cruise Control Front Distance Range Sensor
When the engine switch is on (IG), a communication error between the millimeter wave radar sensor assembly and the driving support ECU assembly is detected for approximately 1 second.
  1. CAN communication system
  2. Millimeter wave radar sensor assembly
  3. Driving support ECU assembly
U023A
Lost Communication with Front Camera Module
When the engine switch is on (IG), a communication error between the forward recognition camera and driving support ECU assembly is detected for approximately 2 seconds.
  1. CAN communication system
  2. Forward recognition camera
  3. Driving support ECU assembly
U1002
Lost Communi cation with Gateway Module
When the engine switch is on (IG), communication between the driving support ECU and any of the following components is abnormal for 2 seconds or more.
  1. Forward recognition camera
  2. Millimeter wave radar sensor assembly
  1. CAN communication system
  2. Forward recognition camera
  3. Millimeter wave radar sensor assembly
  4. Driving support ECU assembly
U1104
Lost Communication with Driving Support ECU
  1. When the engine switch is on (IG), a communication error between the driving support ECU assembly and the millimeter wave radar sensor assembly is detected for approximately 0.2 seconds.
  2. When the engine switch is on (IG), a communication error between the driving support ECU assembly and the forward recognition camera is detected for approximately 0.2 seconds.
  3. When the engine switch is on (IG), a communication error between the driving support ECU assembly and the master cylinder solenoid (skid control ECU) is detected for approximately 1.5 seconds.
  1. CAN communication system
  2. Master cylinder solenoid (skid control ECU)
  3. Forward recognition camera
  4. Millimeter wave radar sensor assembly
  5. Driving support ECU assembly

INSPECTION PROCEDURE

HINT:
When 2 or more DTCs starting with "U" are output simultaneously, inspect the connectors and wire harnesses of each ECU.
1.CHECK DTC (CAN COMMUNICATION SYSTEM)

  1. Connect the GTS to the DLC3.

  1. Turn the engine switch on (IG).

  1. Enter the following menus: Body Electrical / Pre-Crash 2 / Trouble Codes.

  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. Check for DTCs (Click here).

    Result
    Result
    		Proceed to
    DTC U0100, U0125, U0126, U0129, U0235, U023A, U1002 or U1104 is not output
    		A
    DTC U0100, U0125, U0126, U0129, U0235, U023A, U1002 and U1104 are output (for LHD (w/ Central Gateway ECU))
    		B
    DTC U0100, U0125, U0126, U0129, U0235, U023A, U1002 and U1104 are output (for RHD (w/ Central Gateway ECU))
    		C



B
GO TO CAN COMMUNICATION SYSTEM (Click here)

C
GO TO CAN COMMUNICATION SYSTEM (Click here)
A

USE SIMULATION METHOD TO CHECK (Click here)