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. CHECK MULTIPLEX COMMUNICATION SYSTEM
(a) Check the DTC Reading and Clearing Diagnostic Trouble Codes.

Result:





B -- GO TO MULTIPLEX COMMUNICATION SYSTEM
A -- Continue to next step.
2. CHECK CAN COMMUNICATION SYSTEM
(a) Check the DTC CAN Communication System.

Result:





B -- GO TO CAN COMMUNICATION SYSTEM
A -- Continue to next step.
3. PERFORM ACTIVE TEST USING TECHSTREAM (WATER TEMPERATURE METER OPERATION)
(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.
4. READ VALUE USING TECHSTREAM (COOLANT TEMP)
(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.
NG -- GO TO ENGINE CONTROL SYSTEM
OK -- REPLACE COMBINATION METER