METER / GAUGE SYSTEM Engine Coolant Temperature Receiver Gauge Malfunction

DESCRIPTION

In this circuit, the meter CPU receives engine coolant temperature signals from the ECM using the CAN communication lines (CAN No. 1 Bus). The meter CPU displays engine coolant temperature that is calculated based on the data received from the ECM.

INSPECTION PROCEDURE

PROCEDURE

1. Click here

   CHECK CAN COMMUNICATION SYSTEM

   
   

   1. Check if a CAN communication DTC is output (Click here).

      Result
      Result Proceed to CAN communication DTC is not output. A CAN communication DTC is output. B

   
   
   • AClick here
   • BClick here
2. Click here

   PERFORM ACTIVE TEST USING INTELLIGENT TESTER

   
   

   1. Connect the intelligent tester to the DLC3.

   2. Ignition switch on (IG).

   3. Turn the tester on.

   4. Enter the following menus: Body Electrical / Combination Meter / Active Test.

   5. Check the operation by referring to the table below.

      Table 1. Combination Meter:

      Tester Display	Test Part	Control Range	Diagnostic Note
      Water Temperature Meter Operation	Engine coolant temperature receiver gauge	Low, Normal, Hi	-

      OK
      Needle indication is normal.

   
   
   • OKClick here
   • NGClick here
3. Click here

   READ VALUE USING INTELLIGENT TESTER

   
   

   1. Connect the intelligent tester to the DLC3.

   2. Ignition switch on (IG).

   3. Turn the tester on.

   4. Enter the following menus: Body Electrical / Combination Meter / Data List.

   5. Check the values by referring to the table below.

      Table 2. Combination Meter:

      Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
      Coolant Temperature	Engine coolant temperature/Min.: 0°C (32°F), Max.: 127.5°C (261.5°F)	After warming up: 80 to 95°C (176 to 203°F)	If -40°C (-40°F): Sensor circuit open If 140°C (284°F) or more: Sensor circuit shorted

      OK
      Engine coolant temperature value displayed on the tester is almost the same as needle indication.

   
   
   • OKClick here
   • NGClick here
4. Click here

   READ VALUE USING INTELLIGENT TESTER

   
   

   1. Connect the intelligent tester to the DLC3.

   2. Ignition switch on (IG).

   3. Turn the tester on.

   4. Enter the following menus: Powertrain / Engine and ECT / Data List.

   5. Check the values by referring to the table below.

      Table 3. Engine and ECT:

      Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
      Coolant Temp	Engine coolant temperature/Min.: -40°C (-40°F), Max.: 140°C (284°F)	After warming up: 80 to 100°C (176 to 212°F)	-

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

   
   
   • OKClick here
   • NGClick here
5. Click here

   REPLACE COMBINATION METER ASSEMBLY

   
   

   1. Replace the combination meter assembly with a new or a normal one (Click here).

      OK
      The operation of the combination meter assembly returns to normal.

   
   
   • OKClick here
   • NGClick here
6. Click here

   GO TO CAN COMMUNICATION SYSTEMClick here

7. Click here

   REPLACE COMBINATION METER ASSEMBLYClick here

8. Click here

   REPLACE ECMClick here

9. Click here

   END