Meter / Gauge System Engine Coolant Temperature Receiver Gauge Malfunction


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK ENGINE TYPE

CHECK CAN COMMUNICATION SYSTEM

PERFORM ACTIVE TEST USING GTS (WATER TEMPERATURE METER OPERATION)

READ VALUE USING GTS (COOLANT TEMPERATURE)

READ VALUE USING GTS (COOLANT TEMP)

PERFORM ACTIVE TEST USING GTS (WATER TEMPERATURE METER OPERATION)

READ VALUE USING GTS (COOLANT TEMPERATURE)

READ VALUE USING GTS (COOLANT TEMP)

CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - ECM)

CHECK COMBINATION METER ASSEMBLY

METER / GAUGE SYSTEM - Engine Coolant Temperature Receiver Gauge Malfunction


DESCRIPTION

In this circuit, the meter CPU receives engine coolant temperature signals from the ECM. The meter CPU displays engine coolant temperature that is calculated based on the data received from the ECM.

WIRING DIAGRAM


Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Meter Gauge Display.Meter / Gauge System.Meter / Gauge System Engine Coolant Temperature Receiver Gauge Malfunction


Land Cruiser, Land Cruiser Prado. Grj150 Trj150,155 Kdj150,155 Lj150, Gdj150,155.Meter Gauge Display.Meter / Gauge System.Meter / Gauge System Engine Coolant Temperature Receiver Gauge Malfunction


INSPECTION PROCEDURE

HINT:
If there is an open or short in the engine coolant temperature sensor circuit, the ECM stores the DTCs. Troubleshoot the SFI System*1 or ECD System*2.
  1. *1: for Gasoline Engine
  2. *2: for Diesel Engine
  3. for 1GR-FE: LandCruiser RM000000PD915IX.html
  4. for 2TR-FE: LandCruiser RM000000VNB00DX.html
  5. for 1KD-FTV: LandCruiser RM0000012WB0A9X.html
  6. for 1GD-FTV: LandCruiser RM0000012WB0ADX.html
  7. for 1GD-FTV w/ Urea SCR System: LandCruiser RM0000012WB0ACX.html
  8. for 5L-E: LandCruiser RM000000VQ900HX.html
1.CHECK ENGINE TYPE

  1. Check the engine type.

    Result
    Result
    		Proceed to
    except 5L-E
    		A
    for 5L-E
    		B


B
Go to step 6
A


2.CHECK CAN COMMUNICATION SYSTEM

  1. Check if a CAN communication DTC is output.

    1. for LHD with Entry and Start System (LandCruiser RM000000WIB0ECX.html).

    2. for LHD without Entry and Start System (LandCruiser RM000000WIB0EDX.html).

    3. for RHD with Entry and Start System (LandCruiser RM000000WIB0EEX.html).

    4. for RHD without Entry and Start System (LandCruiser RM000000WIB0EFX.html).

      Result
      Result
      		Proceed to
      CAN communication DTC is not output.
      		A
      CAN communication DTC is output. (for LHD with Entry and Start System)
      		B
      CAN communication DTC is output. (for LHD without Entry and Start System)
      		C
      CAN communication DTC is output. (for RHD with Entry and Start System)
      		D
      CAN communication DTC is output. (for RHD without Entry and Start System)
      		E


B
GO TO CAN COMMUNICATION SYSTEM (LandCruiser RM000001RSO0C5X.html)

C
GO TO CAN COMMUNICATION SYSTEM (LandCruiser RM000001RSO0BYX.html)

D
GO TO CAN COMMUNICATION SYSTEM (LandCruiser RM000001RSO0BZX.html)

E
GO TO CAN COMMUNICATION SYSTEM (LandCruiser RM000001RSO0C0X.html)
A


3.PERFORM ACTIVE TEST USING GTS (WATER TEMPERATURE METER OPERATION)

  1. Using the GTS, perform the Active Test (LandCruiser RM0000012G70JTX.html).


Combination Meter
Tester Display
Measurement Item/Range
Normal Condition
Diagnostic Note
Water Temperature Meter Operation
Engine coolant temperature receiver gauge
OFF, 45, 60, 70, 80, Middle, 110, 120, 127
-
OK:
Engine coolant temperature receiver gauge indication is normal.


NG
REPLACE COMBINATION METER ASSEMBLY (LandCruiser RM000003QKY01CX.html)
OK


4.READ VALUE USING GTS (COOLANT TEMPERATURE)

  1. Using the GTS, read the Data List (LandCruiser RM0000012G70JTX.html).

    Combination Meter
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Coolant Temperature
    		Engine coolant temperature/Min.: 0°C (0°F), Max.: 127.5°C (261.5°F)
    		75 to 100°C (167 to 212°F): After warming up the engine
    		-
    OK:
    Coolant temperature displayed on the GTS is between 75°C (167°F) and 100°C (212°F) after warming up.


NG
Go to step 5
OK

REPLACE COMBINATION METER ASSEMBLY (LandCruiser RM000003QKY01CX.html)

5.READ VALUE USING GTS (COOLANT TEMP)

  1. Using the GTS, read the Data List (LandCruiser RM0000012G70JTX.html).

    Engine and ECT
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Coolant Temp
    		Engine coolant temperature/Min.: -40°C (-40°F), Max: 215°C (419°F)
    		75 to 100°C (167 to 212°F): After warming up the engine
    		-
    OK:
    Engine coolant temperature value displayed on the GTS is almost the same as actual engine coolant temperature.
    Result
    Result
    		Proceed to
    OK
    		A
    NG (for 1GR-FE)
    		B
    NG (for 2TR-FE)
    		C
    NG (for 1KD-FTV)
    		D
    NG (for 1GD-FTV)
    		E


B
REPLACE ECM (LandCruiser RM00000329203TX.html)

C
REPLACE ECM (LandCruiser RM000000VW203EX.html)

D
REPLACE ECM (LandCruiser RM0000013Z002CX.html)

E
REPLACE ECM (LandCruiser RM0000013Z002DX.html)
A

REPLACE COMBINATION METER ASSEMBLY (LandCruiser RM000003QKY01CX.html)

6.PERFORM ACTIVE TEST USING GTS (WATER TEMPERATURE METER OPERATION)

  1. Using the GTS, perform the Active Test (LandCruiser RM0000012G70JTX.html).


Combination Meter
Tester Display
Measurement Item/Range
Normal Condition
Diagnostic Note
Water Temperature Meter Operation
Engine coolant temperature receiver gauge
LOW, 60, 70, 80, Normal, 110, 120, HIGH
-
OK:
Engine coolant temperature receiver gauge indication is normal.


NG
REPLACE COMBINATION METER ASSEMBLY (LandCruiser RM000003QKY01CX.html)
OK


7.READ VALUE USING GTS (COOLANT TEMPERATURE)

  1. Using the GTS, read the Data List (LandCruiser RM0000012G70JTX.html).

    Combination Meter
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Coolant Temperature
    		Engine coolant temperature/Min.: 0°C (0°F), Max.: 127.5°C (261.5°F)
    		75 to 100°C (167 to 212°F): After warming up the engine
    		-
    OK:
    Coolant temperature displayed on the GTS is between 75°C (167°F) and 100°C (212°F) after warming up.


NG
Go to step 8
OK

REPLACE COMBINATION METER ASSEMBLY (LandCruiser RM000003QKY01CX.html)

8.READ VALUE USING GTS (COOLANT TEMP)

  1. Using the GTS, read the Data List (LandCruiser RM0000012G70JTX.html).

    Engine and ECT
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Coolant Temp
    		Engine coolant temperature/Min.: -40°C (-40°F), Max: 215°C (419°F)
    		75 to 100°C (167 to 212°F): After warming up the engine
    		-
    OK:
    Engine coolant temperature value displayed on the GTS is almost the same as actual engine coolant temperature.


NG
REPLACE ECM (LandCruiser RM000000VW203FX.html)
OK


9.CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - ECM)

  1. Disconnect the G6 combination meter assembly connector.

  1. Disconnect the G183 ECM connector.

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

    Standard Resistance:
    Tester Connection
    		Condition
    		Specified Condition
    G6-35 (TEMP) - G183-12 (THWO)
    		Always
    		Below 1 Ω
    G6-35 (TEMP) or G183-12 (THWO) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


10.CHECK COMBINATION METER ASSEMBLY

  1. Replace the combination meter assembly (LandCruiser RM000003QKY01CX.html).

  1. Check that the operation of the engine coolant temperature receiver gauge returns to normal.

    OK:
    The operation of the engine coolant temperature receiver gauge returns to normal.


NG
REPLACE ECM (LandCruiser RM000000VW203FX.html)
OK

END (COMBINATION METER ASSEMBLY IS DEFECTIVE)