Engine Coolant Temperature Gauge Malfunction

METER: METER / GAUGE SYSTEM: Engine Coolant Temperature Gauge Malfunction
- Engine Coolant Temperature Gauge Malfunction

WIRING DIAGRAM





INSPECTION PROCEDURE

HINT
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 first.

PROCEDURE

1. PERFORM ACTIVE TEST USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the tester ON.

(d) Enter the following menus: Body Electrical / Combination Meter / Active Test.

(e) Check the operation by referring to the values in the table below.

Combination Meter:





OK:

Needle indication is normal.

NG -- REPLACE COMBINATION METER
OK -- Continue to next step.

2. READ VALUE USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn the tester ON.

(d) Enter the following menus: Powertrain / Engine and ECT / Data List.

(e) Check the values by referring to the values in the table below.

Engine and ECT (2GR-FSE):





OK:

Engine coolant temperature value displayed on the tester is almost the same as actual engine coolant temperature.

Engine and ECT (1UR-FSE):





OK:

Coolant temperature displayed on the tester is between 75°C (167°F) and 95°C (203°F) after warming up.

NG -- GO TO ENGINE CONTROL SYSTEM
OK -- Continue to next step.

3. REPLACE COMBINATION METER

OK:

Operation of combination meter returns to normal.

NG -- GO TO ENGINE CONTROL SYSTEM

OK -- END