Dtc C1203 Ecm Communication Circuit Malfunction

Brake. Land Cruiser. Urj200, 202 Grj200 Vdj200
Brake Control Dynamic Control Systems. Land Cruiser. Urj200, 202 Grj200 Vdj200

DESCRIPTION

INSPECTION PROCEDURE

CHECK ENGINE TYPE

CHECK DTC (FOR ENGINE CONTROL SYSTEM)

CHECK DTC (FOR ENGINE CONTROL SYSTEM)

CHECK DTC (FOR ENGINE CONTROL SYSTEM)

CHECK DTC (FOR ENGINE CONTROL SYSTEM)

DTC C1203 ECM Communication Circuit Malfunction


DESCRIPTION

The circuit is used to send control information from the skid control ECU (master cylinder solenoid) to the ECM, and engine control information from the ECM to the skid control ECU (master cylinder solenoid) via the CAN communication system.

DTC Code
DTC Detection Condition
Trouble Area
C1203
The engine/drivetrain specification and/or destination information from the ECM does not match the skid control ECU data.
ECM

INSPECTION PROCEDURE

1.CHECK ENGINE TYPE

  1. Check the engine type.

    Result
    Result
    		Proceed to
    1VD-FTV
    		A
    1UR-FE
    		B
    1GR-FE
    		C
    3UR-FE
    		D



B
Go to step 3

C
Go to step 4

D
Go to step 5
A


2.CHECK DTC (FOR ENGINE CONTROL SYSTEM)

  1. Check if the engine control system DTC is output (w/o DPF: Click here, w/ DPF: Click here).

    Result
    Result
    		Proceed to
    DTC is output
    		A
    DTC is not output (w/o DPF)
    		B
    DTC is not output (w/ DPF)
    		C



B
GO TO ENGINE CONTROL SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) (Click here)

C
GO TO ENGINE CONTROL SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) (Click here)
A

REPLACE ECM (Click here)

3.CHECK DTC (FOR ENGINE CONTROL SYSTEM)

  1. Check if the engine control system DTC is output (Click here).

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



B
GO TO ENGINE CONTROL SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) (Click here)
A

REPLACE ECM (Click here)

4.CHECK DTC (FOR ENGINE CONTROL SYSTEM)

  1. Check if the engine control system DTC is output (Click here).

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



B
GO TO ENGINE CONTROL SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) (Click here)
A

REPLACE ECM (Click here)

5.CHECK DTC (FOR ENGINE CONTROL SYSTEM)

  1. Check if the engine control system DTC is output (Click here).

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



B
GO TO ENGINE CONTROL SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING) (Click here)
A

REPLACE ECM (Click here)