Engine Coolant Temperature Receiver Gauge Malfunction

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

DESCRIPTION

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

WIRING DIAGRAM





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 SFI System for 2AR-FE, SFI System for 2GR-FE).

PROCEDURE

1. CHECK CAN COMMUNICATION SYSTEM

(a) Check if a CAN communication DTC is output Diagnosis System.

Result:





B -- GO TO CAN COMMUNICATION SYSTEM How to Proceed With Troubleshooting
A -- Continue to next step.

2. PERFORM ACTIVE TEST USING TECHSTREAM (WATER TEMPERATURE METER OPERATION)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

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

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

Combination Meter





OK:

Engine coolant temperature receiver gauge indication is normal.

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

3. CHECK SFI SYSTEM

(a) Check if the SFI system output the DTC Reading and Clearing Diagnostic Trouble Codes for 2AR-FE, Reading and Clearing Diagnostic Trouble Codes for 2GR-FE).

Result:





B -- GO TO SFI SYSTEM (for 2AR-FE) SFI System

C -- GO TO SFI SYSTEM (for 2GR-FE) SFI System
A -- Continue to next step.

4. READ VALUE USING TECHSTREAM (COOLANT TEMPERATURE, COOLANT TEMP)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus:

(1) for Combination Meter: Body Electrical / Combination Meter / Data List.

(2) for Engine and ECT: Powertrain / Engine and ECT / Data List.

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

Combination Meter





Engine and ECT





Result:





HINT
* When the Data List values of the ECUs match, an internal malfunction of the combination meter assembly is suspected.
* When the Data List values of the ECUs do not match, a signal output error of the ECM or an internal malfunction of the combination meter assembly is suspected

B -- REPLACE ECM (for 2AR-FE) Removal

C -- REPLACE ECM (for 2GR-FE) Removal

A -- REPLACE COMBINATION METER ASSEMBLY Removal