Dtc U0100 Lost Communication With Ecm / Pcm A

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

DESCRIPTION

INSPECTION PROCEDURE

READ VALUE USING GTS (CAN BUS CHECK)

DTC OUTPUT (ROAD SIGN ASSIST SYSTEM)

CHECK CAN COMMUNICATION SYSTEM

DTC U0100 Lost Communication with ECM / PCM "A"

DTC U0101 Lost Communication with TCM

DTC U0123 Lost Communication with Yaw Rate Sensor Module

DTC U0129 Lost Communication with Brake System Control Module

DTC U0142 Lost Communication with Body Control Module "B"

DTC U0155 Lost Communication with Combination Meter


DESCRIPTION

These DTCs are output when a communication malfunction occurs between the sensors and ECUs.

DTC No.
DTC Detection Condition
Trouble Area
U0100
While the vehicle is being driven at 1 km/h (1 mph) or more, a communication error between the ECM and the forward recognition camera is detected for approximately 5 seconds or more.
  1. CAN communication system
  2. ECM
  3. Forward recognition camera
U0101
While the vehicle is being driven at 1 km/h (1 mph) or more, a communication error between the TCM and the forward recognition camera is detected for approximately 5 seconds or more.
  1. CAN communication system
  2. TCM
  3. Forward recognition camera
U0123
While the vehicle is being driven at 1 km/h (1 mph) or more, a communication error between the yaw rate sensor and the forward recognition camera is detected for approximately 5 seconds or more.
  1. CAN communication system
  2. Yaw rate and acceleration sensor (airbag sensor assembly)
  3. Forward recognition camera
U0129
While the engine switch is on (IG), a communication error between the skid control ECU and the forward recognition camera is detected for approximately 5 seconds or more.
  1. CAN communication system
  2. Skid control ECU (master cylinder solenoid)
  3. Forward recognition camera
U0142
While the engine switch is on (IG), a communication error between the main body ECU (multiplex network body ECU) and the forward recognition camera is detected for approximately 5 seconds or more.
  1. CAN communication system
  2. Main body ECU (multiplex network body ECU)
  3. Forward recognition camera
U0155
While the engine switch is on (IG), a communication error between the combination meter assembly and the forward recognition camera is detected for approximately 50 seconds or more.
  1. CAN communication system
  2. Combination meter assembly
  3. Forward recognition camera

INSPECTION PROCEDURE

1.READ VALUE USING GTS (CAN BUS CHECK)

  1. Connect the GTS to the DLC3.

  1. Turn the engine switch on (IG).

  1. Turn the GTS on.

  1. Enter the following menus: System Select / CAN Bus Check.

    Result:

    Result
    		Proceed to
    All of the ECUs and sensors that are currently connected to the CAN communication system are displayed.
    		A
    None of the ECUs and sensors that are currently connected to the CAN communication system are displayed, or some of them are not displayed.
    		B


B
GO TO CAN COMMUNICATION SYSTEM (Click here)
A


2.DTC OUTPUT (ROAD SIGN ASSIST SYSTEM)

  1. Connect the GTS to the DLC3.

  1. Turn the engine switch on (IG).

  1. Turn the GTS on.

  1. Enter the following menus: Body Electrical / Road Sign Assist / Trouble Codes.

  1. Clear DTCs (Click here).


NEXT


3.CHECK CAN COMMUNICATION SYSTEM

  1. Connect the GTS to the DLC3.

  1. Turn the engine switch on (IG).

  1. Enter the following menus: System Select / CAN Bus Check.

  1. Select "Communication Malfunction DTC" from the "CAN Bus Check" screen, and then select "Enter".

    OK:
    CAN communication system is normal.


NG
GO TO DTC CHART (CAN COMMUNICATION SYSTEM) (Click here)
OK

USE SIMULATION METHOD TO CHECK (Click here)