Dtc C1785 Steering Control Ecu Communication Error

Land Cruiser URJ200 URJ202 GRJ200 VDJ200 - SUSPENSION CONTROL

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 CodeDetection ConditionTrouble Area
C1785While the engine switch is on (IG), the steering control ECU malfunction signal is received for 5 seconds.
Variable gear ratio steering system (VGRS system)
Suspension control ECU

INSPECTION PROCEDURE

  • NOTICE:
Before performing troubleshooting, inspect the connectors of related circuits.
If the suspension control ECU or height control sensor is replaced, the vehicle height offset calibration must be performed ().
1.CHECK DTC (VARIABLE GEAR RATIO STEERING SYSTEM)

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

Result
ResultProceed to
DTC is not outputA
DTC is outputB
B
GO TO VARIABLE GEAR RATIO STEERING SYSTEM (DIAGNOSTIC TROUBLE CODE CHART) ()
A
2.CLEAR DTC

Clear the DTCs ().

NEXT
3.CHECK DTC

Check for DTCs.

Result
ResultProceed to
DTC C1785 is outputA
DTC C1785 is not outputB
B
USE SIMULATION METHOD TO CHECK ()
A
REPLACE SUSPENSION CONTROL ECU ()