Meter / Gauge System Engine Coolant Temperature Gauge Malfunction


DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK FOR DTC

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


Toyota Fortuner. Ggn50, 60 Kun51, 61 Tgn51 Lan50.Meter.Meter / Gauge System.Meter / Gauge System Engine Coolant Temperature Gauge Malfunction


INSPECTION PROCEDURE

1.CHECK FOR DTC

  1. Check for DTCs of the ECD system*1 or SFI system*2.
    *1: for 1KD-FTV, 2KD-FTV, 5L-E
    *2: for 2TR-FE, 1GR-FE

    Result
    Result
    		Proceed to
    DTC is not output
    		A
    DTC is output (for 1KD-FTV, 2KD-FTV, 5L-E)
    		B
    DTC is output (for 2TR-FE, 1GR-FE)
    		C


B
GO TO ECD SYSTEM

C
GO TO SFI SYSTEM
A


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

  1. Disconnect the C27 combination meter assembly connector.

  1. Disconnect the E4*1 or E9*2 or E13*3 or E23*4 ECM connector.
    *1: for 1KD-FTV, 2KD-FTV
    *2: for 2TR-FE
    *3: for 1GR-FE
    *4: for 5L-E

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

    Standard Resistance:
    for 1KD-FTV, 2KD-FTV
    Tester Connection
    		Condition
    		Specified Condition
    C27-4 (TEMP) - E4-2 (THWO)
    		Always
    		Below 1 Ω
    C27-4 (TEMP) or E4-2 (THWO) - Body ground
    		Always
    		10 kΩ or higher
    for 2TR-FE
    Tester Connection
    		Condition
    		Specified Condition
    C27-4 (TEMP) - E9-14 (THWO)
    		Always
    		Below 1 Ω
    C27-4 (TEMP) or E9-14 (THWO) - Body ground
    		Always
    		10 kΩ or higher
    for 1GR-FE
    Tester Connection
    		Condition
    		Specified Condition
    C27-4 (TEMP) - E13-14 (THWO)
    		Always
    		Below 1 Ω
    C27-4 (TEMP) or E13-14 (THWO) - Body ground
    		Always
    		10 kΩ or higher
    for 5L-E
    Tester Connection
    		Condition
    		Specified Condition
    C27-4 (TEMP) - E23-8 (THWO)
    		Always
    		Below 1 Ω
    C27-4 (TEMP) or E23-8 (THWO) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.REPLACE COMBINATION METER ASSEMBLY

  1. Replace the combination meter assembly with a new or normally functioning one (Toyota Fortuner RM000000THS01WX.html).

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


NG
REPLACE ECM
OK

END (COMBINATION METER ASSEMBLY IS DEFECTIVE)