METER / GAUGE SYSTEM Tachometer Malfunction

WIRING DIAGRAM

A0135VLE01

INSPECTION PROCEDURE

PROCEDURE


  1. INSPECT TACHOMETER


    1. A0136PYE01

      Disconnect the C2 tachometer connector.

    2. Start the engine.

    3. Check the voltage with the engine idling.

      OK
      Tester Connection Specified Condition
      C2-2 (S) - Body ground Voltage generated intermittently
      OK
      As shown in the illustration.

    4. Reconnect the tachometer connector.


    NG

    READ VALUE USING INTELLIGENT TESTER (ENGINE SPEED) Click here

    OK

    REPLACE TACHOMETER Click here

  2. READ VALUE USING INTELLIGENT TESTER (ENGINE SPEED)


    1. Connect an intelligent tester to the DLC3.

    2. Start the engine and turn the intelligent tester ON.

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

    4. Read the value displayed on the tester.

      OK
      The engine speed displayed on the tester is approximately equal to the actual engine speed.
      Result
      Result Proceed to
      OK A
      NG (for 1KR-FE with Electronic Throttle Control System) B
      NG (for 1KR-FE without Electronic Throttle Control System) C
      NG (2WZ-TV) D

    B

    GO TO ENGINE CONTROL SYSTEM Click here

    C

    GO TO ENGINE CONTROL SYSTEM Click here

    D

    GO TO ENGINE CONTROL SYSTEM Click here

    A

  3. CHECK HARNESS AND CONNECTOR (TACHOMETER - ECM)


    1. A0138S7E01

      Disconnect the C2 tachometer connector.

    2. Disconnect the B26 or B54 ECM connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance
      for 1KR-FE
      Tester Connection Condition Specified Condition
      C2-2 (S) - B26-13 (TACH) Always Below 1 Ω
      C2-2 (S) or B26-13 (TACH) - Body ground Always 10 kΩ or higher
      for 2WZ-TV
      Tester Connection Condition Specified Condition
      C2-2 (S) - B54-21 (TACH) Always Below 1 Ω
      C2-2 (S) or B54-21 (TACH) - Body ground Always 10 kΩ or higher

    4. Reconnect the ECM connector.

    5. Reconnect the tachometer connector.


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE TACHOMETER Click here