METER / GAUGE SYSTEM Engine Coolant Temperature Receiver Gauge Malfunction

DESCRIPTION

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

WIRING DIAGRAM

B006EDAE32
*1 Combination Meter Assembly
*2 CAN Communication Line

CAUTION / NOTICE / HINT

Note


  • When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.

  • Before replacing the ECM, refer to Precaution.

    Click here

Tech Tips

If there is an open or short in the engine coolant temperature sensor circuit, the ECM stores DTCs. Troubleshoot the SFI system.

for 8GR-FKS:

Click here

for V35A-FTS, w/ Canister Pump Module:

Click here

for V35A-FTS, w/o Canister Pump Module:

Click here

PROCEDURE


  1. CHECK FOR DTC


    1. Check for DTCs.

      Click here


      Body Electrical > Combination Meter > Trouble Codes
      OK
      No DTCs are output.
      Result
      Proceed to
      OK
      NG

    NG

    GO TO DIAGNOSTIC TROUBLE CODE CHART Click here

    OK

  2. CHECK FOR DTC (SFI SYSTEM)


    1. Check for DTCs.

      for 8GR-FKS:

      Click here

      for V35A-FTS, w/ Canister Pump Module:

      Click here

      for V35A-FTS, w/o Canister Pump Module:

      Click here


      Powertrain > Engine > Trouble Codes
      OK
      No DTCs are output.
      Result
      Proceed to
      OK
      NG

    NG

    GO TO SFI SYSTEM for 8GR-FKS: GO TO SFI SYSTEM Click here
    GO TO SFI SYSTEM for V35A-FTS, w/ Canister Pump Module: GO TO SFI SYSTEM Click here
    GO TO SFI SYSTEM for V35A-FTS, w/o Canister Pump Module: GO TO SFI SYSTEM Click here

    OK

  3. READ VALUE USING GTS (COOLANT TEMPERATURE)


    1. Using the GTS, read the Data List.

      Click here


      Body Electrical > Combination Meter > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Coolant Temperature Engine coolant temperature Min.: 0°C (0°F), Max.: 127.5°C (261.5°F) 75 to 100°C (167 to 212°F): After warming up the engine -

      Powertrain > Engine > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Coolant Temperature Engine coolant temperature Min.: -40°C (-40°F), Max: 215°C (419°F) 75 to 100°C (167 to 212°F): After warming up the engine

      This is the engine coolant temperature.*1

      Tech Tips


      • After warming up the engine, the engine coolant temperature will be 75 to 100°C (167 to 212°F).

      • After a long soak, the engine coolant temperature, intake air temperature and ambient air temperature will be approximately equal.

      • If the value is -40°C (-40°F), or higher than 135°C (275°F), the sensor circuit is open or shorted.

      • Check if the engine overheats if the value indicated is higher than 135°C (275°F).
      Coolant Temperature Sensor1 Engine coolant temperature (for outlet side) Min.: -40°C (-40°F), Max.: 215°C (419°F) 75 to 105°C (167 to 221°F): After fully warming up

      Coolant Temperature Sensor1 indicates the output value of the engine coolant temperature sensor (for outlet side).*2

      Tech Tips


      • After a long soak, the Coolant Temperature Sensor, Coolant Temperature Sensor2, Coolant Temperature Sensor3, Intake Air Temperature B1S1, Intake Air Temperature B2S1 and Ambient Temperature will be approximately equal.

      • If the value is -40°C (-40°F), or 140°C (284°F), the sensor circuit is open or shorted.
      Coolant Temperature Sensor2 Engine coolant temperature (for cylinder head side) Min.: -40°C (-40°F), Max.: 215°C (419°F) 75 to 105°C (167 to 221°F): After fully warming up

      Coolant Temperature Sensor2 indicates the output value of the engine coolant temperature sensor (for cylinder head side).*2

      Tech Tips


      • After a long soak, the Coolant Temperature Sensor, Coolant Temperature Sensor2, Coolant Temperature Sensor3, Intake Air Temperature B1S1, Intake Air Temperature B2S1 and Ambient Temperature will be approximately equal.

      • If the value is -40°C (-40°F), or 140°C (284°F), the sensor circuit is open or shorted.
      Coolant Temperature Sensor3 Engine coolant temperature (for inlet side) Min.: -40°C (-40°F), Max.: 215°C (419°F) 75 to 105°C (167 to 221°F): After fully warming up

      Coolant Temperature Sensor3 indicates the output value of the engine coolant temperature sensor (for inlet side).*2

      Tech Tips


      • After a long soak, the Coolant Temperature Sensor, Coolant Temperature Sensor2, Coolant Temperature Sensor3, Intake Air Temperature B1S1, Intake Air Temperature B2S1 and Ambient Temperature will be approximately equal.

      • If the value is -40°C (-40°F), or 140°C (284°F), the sensor circuit is open or shorted.

      • *1: for 8GR-FKS

      • *2: for V35A-FTS


      Body Electrical > Combination Meter > Data List
      Tester Display
      Coolant Temperature

      Powertrain > Engine > Data List
      Tester Display
      Coolant Temperature
      Coolant Temperature Sensor1
      Coolant Temperature Sensor2
      Coolant Temperature Sensor3

      Tech Tips


      • When the Data List values of the ECUs match, an internal malfunction of the ECM 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.

      OK
      The Data List values of the ECUs do not match.
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE ECM for 8GR-FKS: REPLACE ECM Click here
    REPLACE ECM for V35A-FTS: REPLACE ECM Click here

    NG

    REPLACE COMBINATION METER ASSEMBLY Click here