Malfunction In Water Temperature Warning Light

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

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





INSPECTION PROCEDURE
HINT:
- If DTC U0100 has been stored, troubleshoot the CAN communication system first.
- 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.

PROCEDURE

1. PERFORM ACTIVE TEST USING TECHSTREAM (COOLANT HOT)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch ON and turn the tester ON.
(c) Enter the following menus: Body Electrical / Combination Meter / Active Test.
Body Electrical / Combination Meter / Active Test::






OK:
Both the engine coolant temperature warning light and indicator light are operated in accordance with the tester instructions.
NG -- REPLACE COMBINATION METER ASSEMBLY
OK -- Continue to next step.
2. READ VALUE USING TECHSTREAM (COOLANT TEMP)
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch ON and turn the tester ON.
(c) Select the item below from the Data List, and read the value displayed on the Techstream.
Body Electrical / Combination Meter / Data List::





HINT:
- If the value is 0°C (32°F), the sensor circuit is open.
- 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
OK -- REPLACE COMBINATION METER ASSEMBLY