Dtc C1785 Steering Control Ecu Communication Error

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

DESCRIPTION

INSPECTION PROCEDURE

CHECK DTC (VARIABLE GEAR RATIO STEERING SYSTEM)

CLEAR DTC

CHECK DTC

DTC C1785 Steering Control ECU Communication Error


DESCRIPTION

The suspension control ECU receives signals from the steering control ECU via CAN communication.

DTC Code
Detection Condition
Trouble Area
C1785
While the engine switch is on (IG), the steering control ECU malfunction signal is received for 5 seconds.
  1. Variable gear ratio steering system (VGRS system)
  2. 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.CHECK DTC (VARIABLE GEAR RATIO STEERING SYSTEM)

  1. Check if a DTC is output from the variable gear ratio steering system (Click here).

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



B
GO TO VARIABLE GEAR RATIO STEERING SYSTEM (DIAGNOSTIC TROUBLE CODE CHART) (Click here)
A


2.CLEAR DTC

  1. Clear the DTCs (Click here).


NEXT


3.CHECK DTC

  1. Check for DTCs.

    Result
    Result
    		Proceed to
    DTC C1785 is output
    		A
    DTC C1785 is not output
    		B



B
USE SIMULATION METHOD TO CHECK (Click here)
A

REPLACE SUSPENSION CONTROL ECU (Click here)