Dtc U0100 Lost Communication With Ecm / Pcm A

Suspension. Land Cruiser. Urj200, 202 Grj200 Vdj200
Suspension Control. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

INSPECTION PROCEDURE

CLEAR DTC

CHECK DTC

DTC U0100 Lost Communication with ECM / PCM "A"

DTC U0101 Lost Communication with TCM

DTC U0114 Lost Communication with 4WD Control ECU

DTC U0122 Lost Communication with Vehicle Dynamics Control Module

DTC U0124 Lost Communication with Lateral Acceleration Sensor Module

DTC U0126 Lost Communication with Steering Angle Sensor Module

DTC U0130 Lost Communication with VGRS

DTC U0140 Lost Communication with Main Body ECU


DESCRIPTION

The suspension control ECU receives signals from the ECM, 4 wheel drive control ECU, skid control ECU (master cylinder solenoid), acceleration sensor (airbag sensor assembly), steering angle sensor (spiral with sensor cable sub-assembly), VGRS ECU (steering control ECU) and main body ECU (multiplex network body ECU) via CAN communication. When DTCs indicating a CAN communication system malfunction are output, repair the CAN communication system first.

DTC Code
Detection Condition
Trouble Area
U0100
While driving at 30 km/h (19 mph), CAN communication between the suspension control ECU and ECM stops for 3 seconds or more.
  1. CAN communication system
  2. ECM
  3. Suspension control ECU
U0101
While driving at 30 km/h (19 mph), CAN communication between the suspension control ECU and ECM stops for 3 seconds or more.
  1. CAN communication system
  2. ECM
  3. Suspension control ECU
U0114
While driving at 30 km/h (19 mph), CAN communication between the suspension control ECU and 4 wheel drive control ECU stops for 3 seconds or more.
  1. CAN communication system
  2. 4 wheel drive control ECU
  3. Suspension control ECU
U0122
CAN communication between the suspension control ECU and skid control ECU (master cylinder solenoid) stops for 3 seconds or more.
  1. CAN communication system
  2. Skid control ECU (master cylinder solenoid)
  3. Suspension control ECU
U0124
CAN communication between the suspension control ECU and acceleration sensor (airbag sensor assembly) stops for 3 seconds or more.
  1. CAN communication system
  2. Acceleration sensor (airbag sensor assembly)
  3. Suspension control ECU
U0126
CAN communication between the suspension control ECU and steering angle sensor (spiral with sensor cable sub-assembly) stops for 3 seconds or more.
  1. CAN communication system
  2. Steering angle sensor (spiral with sensor cable sub-assembly)
  3. Suspension control ECU
U0130
5 seconds after the engine switch is turned on (IG), CAN communication between the suspension control ECU and steering control ECU stops for 3 seconds or more.
  1. CAN communication system
  2. VGRS ECU (steering control ECU)
  3. Suspension control ECU
U0140
CAN communication between the suspension control ECU and main body ECU (multiplex network body ECU) stops for 5 seconds or more.
  1. CAN communication system
  2. Main body ECU (multiplex network body ECU)
  3. Suspension control ECU

INSPECTION PROCEDURE

NOTICE:
  1. Before performing troubleshooting, inspect the connectors of related circuits.
  2. If the suspension control ECU or height control sensor is replaced, the vehicle height offset calibration must be performed (Click here).
1.CLEAR DTC

  1. Clear the DTCs (Click here).


NEXT


2.CHECK DTC

  1. Perform a road test.

  1. Check for DTCs.

    OK:
    DTC is not output.
    Result
    Result
    		Proceed to
    OK
    		A
    NG (for LHD with Central Gateway ECU)
    		B
    NG (for RHD without Central Gateway ECU)
    		C


B
GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) (Click here)

C
GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) (Click here)
A

USE SIMULATION METHOD TO CHECK (Click here)