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

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

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

PERFORM ACTIVE TEST USING TECHSTREAM (COOLANT HOT)

READ VALUE USING TECHSTREAM (COOLANT TEMP)

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


DESCRIPTION

The combination meter assembly controls both the engine coolant temperature warning light and indicator light in accordance with engine coolant temperature signals from the ECM.
The engine coolant temperature indicator light turns off when the engine coolant temperature exceeds 55°C (131°F) and illuminates when the temperature decreases to below 45°C (113°F).
The engine coolant temperature warning light flashes when the engine coolant temperature reaches 117°C (242.6°F) and illuminates when the temperature exceeds 120°C (248°F). When the temperature decreases to 119.5°C (247.1°F) while the warning light is illuminated, the warning light begins to flashing. In addition, when the temperature decreases to below 116.5°C(241.7°F) the warning light turns off.

WIRING DIAGRAM


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


INSPECTION PROCEDURE

HINT:
  1. If DTC U0100 has been stored, troubleshoot the CAN communication system first.
  2. If there is an open or short in the engine coolant temperature sensor circuit, an SFI system DTC is output. If output, perform troubleshooting on the SFI system.
1.PERFORM ACTIVE TEST USING TECHSTREAM (COOLANT HOT)

  1. Connect the Techstream to the DLC3.

  1. Turn the ignition switch ON and turn the tester ON.

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

    Body Electrical / Combination Meter / Active Test::

    Tester Display
    		Test Part
    		Control Range
    		Diagnostic Note
    Water Temperature Meter Operation
    		Engine coolant temperature warning light and indicator light
    		LOW: Engine coolant temperature indicator light illuminates.
    NORMAL: Both engine coolant temperature warning light and indicator light turn off.
    HIGH: Engine coolant temperature warning light flashes.
    		-
    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 indicator light
    		OFF/ON
    		Vehicle is stopped and engine is idling
    OK:
    Both the engine coolant temperature warning light and indicator light are operated in accordance with the tester instructions.


NG
REPLACE COMBINATION METER ASSEMBLY (YARIS_NCP93 RM000000IN001JX.html)
OK


2.READ VALUE USING TECHSTREAM (COOLANT TEMP)

  1. Connect the Techstream to the DLC3.

  1. Turn the ignition switch ON and turn the tester ON.

  1. Select the item below from the Data List, and read the value displayed on the Techstream.

    Body Electrical / Combination Meter / Data List::

    Tester Display
    		Measurement Item/Range
    		Normal Condition
    		Diagnostic Note
    Coolant Temperature
    		Engine coolant temperature / Min.: 0°C,Max.: 127.5°C
    		After warming up: 75 to 105°C (167 to 221°F)
    		-
    HINT:
    1. If the value is 0°C (32°F), the sensor circuit is open.
    2. If the value is 127.5°C (262°F), the sensor circuit is shorted.
    OK:
    Coolant temperature displayed on the tester is between 75°C (167°F) and 105°C (221°F) after warming up.


NG
GO TO SFI SYSTEM (YARIS_NCP93 RM000000PD90O2X.html)
OK

REPLACE COMBINATION METER ASSEMBLY (YARIS_NCP93 RM000000IN001JX.html)