Meter / Gauge System (For Hatchback) Malfunction In Water Temperature Warning Light

Vehicle Interior. Yaris. Ncp93, 131
Meter Gauge Display. Yaris. Ncp93, 131

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK CAN COMMUNICATION SYSTEM

PERFORM ACTIVE TEST USING TECHSTREAM (COOLANT TEMP)

READ VALUE USING TECHSTREAM (COOLANT TEMPERATURE)

CHECK ENGINE CONTROL SYSTEM

METER / GAUGE SYSTEM (for Hatchback) - Malfunction in Water Temperature Warning Light


DESCRIPTION

In this circuit, the meter CPU receives engine coolant temperature signals from the ECM using the CAN communication system (CAN V1 Bus). The meter CPU displays engine coolant temperature that is calculated based on the data received from the ECM.

WIRING DIAGRAM


Yaris. Ncp93, 131.Meter Gauge Display.Meter / Gauge System (For Sedan).Meter / Gauge System (For Hatchback) Malfunction In Water Temperature Warning Light


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 (YARIS_NCP93 RM000000PD90QDX.html).
1.CHECK CAN COMMUNICATION SYSTEM

  1. Check if a CAN communication DTC is output (YARIS_NCP93 RM000001RSW02LX.html).

    Result
    Result
    		Proceed to
    CAN communication DTC is not output
    		A
    CAN communication DTC is output (for Hatchback except Separate Type Yaw Rate Sensor)
    		B
    CAN communication DTC is output (for Hatchback with Separate Type Yaw Rate Sensor)
    		C


B
GO TO CAN COMMUNICATION SYSTEM (YARIS_NCP93 RM000001RSW02LX.html)

C
GO TO CAN COMMUNICATION SYSTEM (YARIS_NCP93 RM000001RSW02PX.html)
A


2.PERFORM ACTIVE TEST 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: Body Electrical / Combination Meter / Active Test.

  1. According to the display on the Techstream, perform the Active Test.

    Combination Meter
    Tester Display
    		Test Part
    		Control Range
    		Diagnostic Note
    Indicat. Lamp Coolant Cool
    		Engine coolant temperature indicator light
    		OFF/ON
    		Vehicle is stopped and engine is idling
    Indicat. Lamp Coolant Hot
    		Engine coolant temperature warning light
    		OFF/ON
    		Vehicle is stopped and engine is idling
    OK:
    Value selected during Active Test is displayed.


NG
REPLACE COMBINATION METER ASSEMBLY (YARIS_NCP93 RM0000035EJ00BX.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. According to the display on the Techstream, read the Data List.

    Combination Meter
    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Coolant Temperature
    		Engine coolant temperature/
    Min.: 0 (32)
    Max.: 127.5 (261.5)
    		After warming up:
    80 to 100 (176 to 212)
    		Unit: °C (°F)
    OK:
    Vehicle's coolant temperature and tester value are the same.


NG
REPLACE COMBINATION METER ASSEMBLY (YARIS_NCP93 RM0000035EJ00BX.html)
OK


4.CHECK ENGINE CONTROL SYSTEM

  1. Check if a engine control DTC is output (YARIS_NCP93 RM000000PDK0T5X.html).

    Result
    Result
    		Proceed to
    Engine control DTC is not output
    		A
    Engine control DTC is output
    		B


B
GO TO SFI SYSTEM (YARIS_NCP93 RM000000PDF0EWX.html)
A

REPLACE COMBINATION METER ASSEMBLY (YARIS_NCP93 RM0000035EJ00BX.html)