METER / GAUGE SYSTEM Fuel Economy Meter Malfunction

DESCRIPTION

The combination meter communicates with the ECM and skid control ECU via the CAN communication system. The combination meter calculates the current fuel consumption based on a vehicle speed signal from the skid control ECU, a fuel injection signal from the ECM.

WIRING DIAGRAM

A01HPCYE02

INSPECTION PROCEDURE

PROCEDURE


  1. 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

    B

    GO TO CAN COMMUNICATION SYSTEM Click here

    A

  2. PERFORM ACTIVE TEST USING TECHSTREAM (FUEL CONSUMPTION METER OPERATION)


    1. Connect the Techstream to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the Techstream on.

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

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

      Combination Meter:
      Tester Display Test Part Control Range Diagnostic Note
      Fuel Consumption Meter Operation Fuel receiver gauge MIN, 1/4, 1/2, 3/4, MAX -
      OK
      Needle indication is normal.

    NG

    REPLACE COMBINATION METER ASSEMBLY Click here

    OK

  3. READ VALUE USING TECHSTREAM (VEHICLE SPEED, INJECTION VOLUME)


    1. Connect the Techstream to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the Techstream on.

    4. Enter the following menus:


      1. for ABS/VSC/TRAC: Chassis / ABS/VSC/TRAC / Data List.

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

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

      ABS/VSC/TRAC
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Vehicle Speed Maximum wheel speed sensor reading/Min.: 0 km/h (0 mph), Max.: 326 km/h (202 mph) Vehicle stopped: 0 km/h (0 mph) When driving at constant speed: No large fluctuations
      Engine and ECT
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Injection Volume (Cylinder 1) Injection volume (cylinder 1)/Min.: 0 ml, Max.: 2.047 ml 0 to 0.5 ml

      • Stored as Freeze Frame Data

      • This is the fuel injection volume for 10 injections

      Results of real-vehicle check:


      • Idling (engine warmed up): 0.108 ml

      • Running without load (3000 rpm): 0.097 ml
      Result
      Result Proceed to
      The data list values displayed on the Techstream is within the normal condition range. A
      The data list values displayed on the Techstream differs from the normal condition range. (ABS/VSC/TRAC) B
      The data list values displayed on the Techstream differs from the normal condition range (for 2AR-FE). (Engine and ECT) C
      The data list values displayed on the Techstream differs from the normal condition range (for 2GR-FE). (Engine and ECT) D

      Tech Tips


      • 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 skid control ECU or an internal malfunction of the combination meter assembly is suspected.


    B

    GO TO BRAKE CONTROL SYSTEM Click here

    C

    GO TO SFI SYSTEM Click here

    D

    GO TO SFI SYSTEM Click here

    A

  4. REPLACE BRAKE ACTUATOR ASSEMBLY


    1. Replace the brake actuator assembly with a new or a known good one Click here.

      Result
      Result Proceed to
      The operation of the fuel economy meter returns to normal. A
      The operation of the fuel economy meter does not return to normal. B

    B

    REPLACE ECM Click here

    A

    END

  5. REPLACE ECM


    1. Replace the ECM with a new or a known good one Click here for 2AR-FE, Click here for 2GR-FE).

      Result
      Result Proceed to
      The operation of the fuel economy meter returns to normal. A
      The operation of the fuel economy meter does not return to normal. B

    B

    REPLACE COMBINATION METER ASSEMBLY Click here

    A

    END