Malfunction In Water Temperature Warning Light

METER: METER / GAUGE SYSTEM: Malfunction in Water Temperature Warning Light
- Malfunction in Water Temperature Warning Light

DESCRIPTION

The ECM sends engine coolant temperature sensor signals to the combination meter assembly via CAN communication. Then the combination meter assembly indicates the engine coolant temperature.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CONFIRM DTC OUTPUT (CAN COMMUNICATION SYSTEM)

(a) Connect a Techstream to the DLC3.

(b) Turn the ignition switch to ON and turn the Techstream on.

(c) Check for DTCs and note any codes that are output Reading and Clearing Diagnostic Trouble Codes.

(d) Clear the DTC Reading and Clearing Diagnostic Trouble Codes.

(e) Recheck for DTC Reading and Clearing Diagnostic Trouble Codes.

Result





B -- GO TO DIAGNOSTIC TROUBLE CODE CHART How to Proceed With Troubleshooting
A -- Continue to next step.

2. CONFIRM DTC OUTPUT (ENGINE CONTROL SYSTEM)

(a) Connect a Techstream to the DLC3.

(b) Turn the ignition switch to ON and turn the Techstream on.

(c) Check for DTCs and note any codes that are output Reading and Clearing Diagnostic Trouble Codes.

(d) Clear the DTC Reading and Clearing Diagnostic Trouble Codes.

(e) Recheck for DTC Reading and Clearing Diagnostic Trouble Codes.

Result





B -- GO TO DIAGNOSTIC TROUBLE CODE CHART How to Proceed With Troubleshooting
A -- Continue to next step.

3. PERFORM ACTIVE TEST USING TECHSTREAM (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: Body Electrical / Combination Meter / Active Test.

(e) According to the display on the Techstream, perform the Active Test.

Combination Meter





OK:

Value selected during "Active Test" is displayed.

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

4. READ VALUE USING TECHSTREAM (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: Body Electrical / Combination Meter / Data List.

(e) According to the display on the Techstream, read the Data List.

Combination Meter





OK:

Vehicle's coolant temperature and tester value are the same.

NG -- REPLACE COMBINATION METER ASSEMBLY Removal

OK -- USE SIMULATION METHOD TO CHECK How to Proceed With Troubleshooting