Dtc C1794 Height Control Off Switch Circuit (Test Mode Dtc)

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

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

INSPECT INTEGRATION CONTROL AND PANEL ASSEMBLY

CHECK HARNESS AND CONNECTOR (SUSPENSION CONTROL ECU - INTEGRATION CONTROL AND PANEL ASSEMBLY AND BODY GROUND)

DTC C1794 Height Control OFF Switch Circuit (Test Mode DTC)


DESCRIPTION

When the height control switch OFF (integration control and panel assembly) is pushed and height control turns off.
The off condition of the height control will not be canceled until the height control OFF switch is pushed again or the vehicle is driven.

DTC Code
Detection Condition
Trouble Area
C1794
The test mode procedure is performed.
  1. Harness or connector
  2. Height control OFF switch (integration control and panel assembly)
  3. Suspension control ECU

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.Suspension Control.Suspension Control System. Dtc C1794 Height Control Off Switch Circuit (Test Mode Dtc)


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.INSPECT INTEGRATION CONTROL AND PANEL ASSEMBLY

  1. Remove the height control OFF switch (integration control and panel assembly) (Click here).

  1. Inspect the height control OFF switch (integration control and panel assembly) (Click here).



NG
REPLACE INTEGRATION CONTROL AND PANEL ASSEMBLY (Click here)
OK


2.CHECK HARNESS AND CONNECTOR (SUSPENSION CONTROL ECU - INTEGRATION CONTROL AND PANEL ASSEMBLY AND BODY GROUND)

  1. Disconnect the K34 suspension control ECU connector.

  1. Disconnect the V8 height control OFF switch (integration control and panel assembly) connector.

  1. Measure the resistance according to the value(s) in the table below.

    Standard Resistance:
    Tester Connection
    		 Condition
    		Specified Condition
    K34-11 (TD) - V8-7 (N)
    		Always
    		Below 1 Ω
    K34-11 (TD) or V8-7 (N) - Body ground
    		Always
    		10 kΩ or higher
    V8-10 (E) - Body ground
    		Always
    		Below 1 Ω


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE SUSPENSION CONTROL ECU (Click here)