Meter / Gauge System Engine Coolant Temperature Gauge Malfunction

Vehicle Interior. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25
Meter Gauge Display. Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK FOR DTC

CHECK ENGINE TYPE

CHECK ENGINE TYPE

CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - ECM)

REPLACE COMBINATION METER ASSEMBLY

METER / GAUGE SYSTEM - Engine Coolant Temperature 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


Hilux. Tgn26, 36 Kun25, 26, 35, 36 Ggn25.Meter Gauge Display.Meter / Gauge System.Meter / Gauge System Engine Coolant Temperature Gauge Malfunction


INSPECTION PROCEDURE

1.CHECK FOR DTC
  1. *1: for 1KD-FTV, 2KD-FTV
  2. *2: for 2TR-FE, 2TR-FBE

  1. Check for DTCs of the ECD system*1 or SFI system*2.

    1. for 1KD-FTV, w/ EGR Cooler (HILUX_TGN26 RM000000PDK0SYX.html).
    2. for 1KD-FTV, w/o EGR Cooler (HILUX_TGN26 RM000000PDK0T9X.html).
    3. for 2KD-FTV, w/ EGR Cooler (HILUX_TGN26 RM000000PDK0TAX.html).
    4. for 2KD-FTV, w/o EGR Cooler (HILUX_TGN26 RM000000PDK0SWX.html).
    5. for 2TR-FE, w/ Secondary Air Injection System (HILUX_TGN26 RM000000PDK0SXX.html).
    6. for 2TR-FE, w/o Secondary Air Injection System (HILUX_TGN26 RM000000PDK0U8X.html).
    7. for 2TR-FBE (HILUX_TGN26 RM000000PDK0T7X.html).
    Result
    Result
    		Proceed to
    DTC is output (for 1KD-FTV, 2KD-FTV)
    		A
    DTC is output (for 2TR-FE, 2TR-FBE)
    		B
    DTC is not output
    		C


B
Go to step 3

C
Go to step 4
A


2.CHECK ENGINE TYPE

  1. Check the engine type.

    Result
    Result
    		Proceed to
    for 1KD-FTV, w/ EGR Cooler
    		A
    for 1KD-FTV, w/o EGR Cooler
    		B
    for 2KD-FTV, w/ EGR Cooler
    		C
    for 2KD-FTV, w/o EGR Cooler
    		D


B
GO TO ECD SYSTEM (HILUX_TGN26 RM0000031HW021X.html)

C
GO TO ECD SYSTEM (HILUX_TGN26 RM0000031HW022X.html)

D
GO TO ECD SYSTEM (HILUX_TGN26 RM000000TIH04OX.html)
A

GO TO ECD SYSTEM (HILUX_TGN26 RM0000031HW01ZX.html)

3.CHECK ENGINE TYPE

  1. Check the engine type.

    Result
    Result
    		Proceed to
    for 2TR-FE, w/ Secondary Air Injection System
    		A
    for 2TR-FE, w/o Secondary Air Injection System
    		B
    for 2TR-FBE
    		C


B
GO TO SFI SYSTEM (HILUX_TGN26 RM000004ROP009X.html)

C
GO TO SFI SYSTEM (HILUX_TGN26 RM000000PDF0EXX.html)
A

GO TO SFI SYSTEM (HILUX_TGN26 RM0000032SF022X.html)

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

  1. Disconnect the G19 combination meter assembly connector.

  1. Disconnect the G39*1, G88*2 or C97*3 ECM connector.

    1. *1: for 1KD-FTV, 2KD-FTV
    2. *2: for 2TR-FE
    3. *3: for 2TR-FBE

  1. Measure the resistance of the wire harness side connectors.

    Standard Resistance:
    for 1KD-FTV, 2KD-FTV
    Tester Connection
    		Condition
    		Specified Condition
    G19-4 (TEMP) - G39-2 (THWO)
    		Always
    		Below 1 Ω
    G19-4 (TEMP) or G39-2 (THWO) - Body ground
    		Always
    		10 kΩ or higher
    for 2TR-FE
    Tester Connection
    		Condition
    		Specified Condition
    G19-4 (TEMP) - G88-14 (THWO)
    		Always
    		Below 1 Ω
    G19-4 (TEMP) or G88-14 (THWO) - Body ground
    		Always
    		10 kΩ or higher
    for 2TR-FBE
    Tester Connection
    		Condition
    		Specified Condition
    G19-4 (TEMP) - C97-26 (THWO)
    		Always
    		Below 1 Ω
    G19-4 (TEMP) or C97-26 (THWO) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


5.REPLACE COMBINATION METER ASSEMBLY

  1. Replace the combination meter assembly with a new or normally functioning one (HILUX_TGN26 RM000000THS01QX.html).

    OK:
    The operation of the engine coolant temperature gauge returns to normal.
    Result
    Result
    		Proceed to
    OK
    		A
    NG (for 1KD-FTV)
    		B
    NG (for 2KD-FTV)
    		C
    NG (for 2TR-FE)
    		D
    NG (for 2TR-FBE)
    		E


B
REPLACE ECM (HILUX_TGN26 RM0000013Z0019X.html)

C
REPLACE ECM (HILUX_TGN26 RM0000043H100GX.html)

D
REPLACE ECM (HILUX_TGN26 RM000000VW2023X.html)

E
REPLACE ECM (HILUX_TGN26 RM000000VW2024X.html)
A

END (COMBINATION METER ASSEMBLY IS DEFECTIVE)