Dtc C1719 Oil Temperature Sensor Circuit Malfunction

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

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

READ VALUE USING INTELLIGENT TESTER (OIL TEMPERATURE SENSOR)

RECONFIRM DTC OUTPUT

CHECK HARNESS AND CONNECTOR (TEMPERATURE SENSOR - SUSPENSION CONTROL ECU)

INSPECT FLUID TEMPERATURE SENSOR

DTC C1719 Oil Temperature Sensor Circuit Malfunction


DESCRIPTION

This circuit is used for sending the data to detect the fluid temperature of the pump. The abnormality of the fluid is judged by the ECU.

DTC Code
Detection Condition
Trouble Area
C1719
When one of the following conditions is met:
  1. When detecting an abnormal signal from the fluid temperature sensor (fluid temperature sensor terminal voltage of ECU is 0.1 V or less or 4.8 V or higher) for 1 second.
  2. When there is a fluid temperature sensor power supply voltage malfunction.
  1. Harness or connector
  2. Height control pump and motor (Fluid temperature sensor)
  3. Suspension control ECU

WIRING DIAGRAM


Land Cruiser. Urj200, 202 Grj200 Vdj200.Suspension Control.Suspension Control System. Dtc C1719 Oil Temperature Sensor Circuit Malfunction


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.READ VALUE USING INTELLIGENT TESTER (OIL TEMPERATURE SENSOR)

  1. Connect the intelligent tester to the DLC3.

  1. Turn the engine switch on (IG) and the tester on.

  1. Select the Data List mode on the intelligent tester.

  1. Check the fluid temperature value of the temperature sensor displayed on the intelligent tester.

    AHC
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Oil Temperature Sensor
    		Fluid temperature sensor reading /
    min.: -3276.8°C (-5866.24°F)
    max.: 3276.7°C (5930.06°F)
    		Actual fluid temperature
    		-
    OK:
    Same as actual fluid temperature


NG
Go to step 3
OK


2.RECONFIRM DTC OUTPUT

  1. Clear the DTCs (Click here).

  1. Perform a road test.

  1. Check for DTCs.

    Result
    Result
    		Proceed to
    DTC C1719 is output
    		A
    DTC C1719 is not output
    		B


B
USE SIMULATION METHOD TO CHECK (Click here)
A

REPLACE SUSPENSION CONTROL ECU (Click here)

3.CHECK HARNESS AND CONNECTOR (TEMPERATURE SENSOR - SUSPENSION CONTROL ECU)
NOTICE:
When inspecting the wire harness between the suspension control ECU and temperature sensor, it is difficult to determine the malfunctioning area if there is a sensor power supply malfunction. Therefore, disconnect the connectors for the temperature sensor, the acceleration sensors (front RH, front LH) and pressure accumulator sensor on the ECU side.

  1. Disconnect the K34 and K35 ECU connectors.



  1. Disconnect the i1 sensor connector.


    Land Cruiser. Urj200, 202 Grj200 Vdj200.Suspension Control.Suspension Control System. Dtc C1719 Oil Temperature Sensor Circuit Malfunction

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    K35-17 (TOIL) - i1-2 (TOIL)
    		Always
    		Below 1 Ω
    K35-17 (TOIL) - Body ground
    		Always
    		10 kΩ or higher
    K35-18 (STG) - i1-1 (SBL)
    		Always
    		Below 1 Ω
    K35-18 (STG) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


4.INSPECT FLUID TEMPERATURE SENSOR
Land Cruiser. Urj200, 202 Grj200 Vdj200.Suspension Control.Suspension Control System. Dtc C1719 Oil Temperature Sensor Circuit Malfunction

  1. Connect the i2 temperature sensor connector.

  1. Disconnect the K34 and K35 ECU connectors.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    K35-17 (TOIL) - K35-18 (STG)
    		20°C (68°F)
    		2.32 to 2.59 kΩ


NG
REPLACE HEIGHT CONTROL PUMP AND MOTOR (Click here)
OK

REPLACE SUSPENSION CONTROL ECU (Click here)