Meter / Gauge System Engine Coolant Temperature Receiver Gauge Malfunction

Vehicle Interior. Corolla. Zre142 Aze141
Meter Gauge Display. Corolla. Zre142 Aze141

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK CAN COMMUNICATION SYSTEM

PERFORM ACTIVE TEST USING TECHSTREAM (WATER TEMPERATURE METER OPERATION)

READ VALUE USING TECHSTREAM (COOLANT TEMPERATURE)

READ VALUE USING TECHSTREAM (COOLANT TEMP)

REPLACE COMBINATION METER

METER / GAUGE SYSTEM - Engine Coolant Temperature Receiver Gauge Malfunction


DESCRIPTION

In this circuit, the meter CPU receives engine coolant temperature signals from the ECM using the CAN communication line (CAN No. 1 Bus). The meter CPU displays engine coolant temperature that is calculated based on the data received from the ECM.

WIRING DIAGRAM


for 2AZ-FE

Corolla. Zre142 Aze141.Meter Gauge Display.Meter / Gauge System.Meter / Gauge System Engine Coolant Temperature Receiver Gauge Malfunction


for 2ZR-FE

Corolla. Zre142 Aze141.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 outputs the DTCs. Perform troubleshooting with the SFI System (COROLLA_ZRE142 RM000000PF50QLX.html for 2AZ-FE, COROLLA_ZRE142 RM000000PF50QKX.html for 2ZR-FE).
1.CHECK CAN COMMUNICATION SYSTEM

  1. Check if CAN communication DTC is output (COROLLA_ZRE142 RM000000WIB0BUX.html).

    Result:

    Result
    		Proceed to
    CAN communication DTC is not output.
    		A
    CAN communication DTC is output.
    		B


B
GO TO CAN COMMUNICATION SYSTEM (COROLLA_ZRE142 RM000000WI60ACX.html)
A


2.PERFORM ACTIVE TEST USING TECHSTREAM (WATER TEMPERATURE METER OPERATION)

  1. Connect the Techstream to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the Techstream on.

  1. Enter the following menus: Body Electrical / Combination Meter / Active Test.

  1. Check the operation by referring to the values in the table below.

    Combination Meter
    Tester Display
    		Test Part
    		Control Range
    		Diagnostic Note
    Water Temperature Meter Operation
    		Engine coolant temperature receiver gauge
    		Low, Normal, High
    		Confirm that the vehicle is stopped, engine idling
    OK:
    Gauge indication is normal.


NG
REPLACE COMBINATION METER (COROLLA_ZRE142 RM0000024D7032X_01_0010.html)
OK


3.READ VALUE USING TECHSTREAM (COOLANT TEMPERATURE)

  1. Connect the Techstream to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the Techstream on.

  1. Enter the following menus: Body Electrical / Combination Meter / Data List.

  1. Check the values by referring to the values in the table below.

    Combination Meter
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Coolant Temp
    		Engine coolant temperature/Min.: -40°C (-40°F), Max.: 140°C (284°F)
    		After warming up: 80 to 100°C (176 to 212°F)
    		-

    Result:

    Result
    		Proceed to
    The engine coolant temperature receiver gauge indication is almost the same as the Techstream indication.
    		A
    The engine coolant temperature receiver indication is differ from the Techstream indication.
    		B


B
REPLACE COMBINATION METER (COROLLA_ZRE142 RM0000024D7032X_01_0010.html)
A


4.READ VALUE USING TECHSTREAM (COOLANT TEMP)

  1. Connect the Techstream to the DLC3.

  1. Turn the ignition switch to ON.

  1. Turn the Techstream on.

  1. Enter the following menus: Powertrain / Engine and ECT / Data List.

  1. Check the values by referring to the values in the table below.

    Engine and ECT
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Coolant Temp
    		Engine coolant temperature/Min.: -40°C (-40°F), Max.: 140°C (284°F)
    		After warming up: 80 to 100°C (176 to 212°F)
    		-

    Result:

    Result
    		Proceed to
    The engine coolant temperature receiver gauge indication is almost the same as the actual engine coolant temperature.
    		A
    The engine coolant temperature receiver gauge indication is differ from the actual engine coolant temperature. (for 2AZ-FE)
    		B
    The engine coolant temperature receiver gauge indication is differ from the actual engine coolant temperature. (for 2ZR-FE)
    		C


B
GO TO SFI SYSTEM (for 2AZ-FE) (COROLLA_ZRE142 RM000000PD90URX.html)

C
GO TO SFI SYSTEM (for 2ZR-FE) (COROLLA_ZRE142 RM000000PD90UQX.html)
A


5.REPLACE COMBINATION METER

  1. Replace the combination meter with a new or a known good one (COROLLA_ZRE142 RM0000024D7032X_01_0010.html).

    OK:
    The operation of the combination meter returns to normal.
    Result:
    Result
    		Proceed to
    OK
    		A
    NG (for 2AZ-FE)
    		B
    NG (for 2ZR-FE)
    		C


B
REPLACE ECM (for 2AZ-FE) (COROLLA_ZRE142 RM000002WT506MX.html)

C
REPLACE ECM (for 2ZR-FE) (COROLLA_ZRE142 RM000001CN0030X.html)
A

END