METER / GAUGE SYSTEM (except General Countries) Tachometer Malfunction

WIRING DIAGRAM

A01KIK0E02

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK ENGINE SERIAL NUMBER


    1. Confirm engine models.

      A B
      5L (Singapore) and 2KD-FTV 5L (Except Singapore)

    B

    INSPECT COMBINATION METER ASSEMBLY Click here

    A

  2. INSPECT COMBINATION METER ASSEMBLY


    1. A01KGMEE01

      Remove the combination meter assembly with connectors still connected.

    2. Check the signal waveform.


      1. Start engine.

      2. Connect the oscilloscope to the terminal C7-13 and C7-6 of combination meter assembly.

      3. Check the signal waveform.

        A01KEAAE01
        A01KILCE01
        Text in Illustration
        *a 5L Engine
        *b 18.5 Pulse/Rev.
        *c 2KD-FTV Engine
        *d 2 Pulse/Rev.
        Result:
        A OK
        B NG (2KD-FTV)
        C NG (5L Singapore)

    B

    INSPECT ECM Click here

    C

    INSPECT EMISSION CONTROL ECU Click here

    A

  3. INSPECT ENGINE TACHOMETER ASSEMBLY


    1. A01KGFUE01

      Remove the combination meter assembly.

    2. Check resistance of engine tachometer assembly.


      1. Measure resistance between terminals of the engine tachometer assembly, as shown in the chart.

        Standard: resistance
        Tester connection Standard resistance (Ω)
        A - D Approx. 160 Ω
        B - C Approx. 160 Ω

    NG

    REPLACE ENGINE TACHOMETER ASSEMBLY

    OK

  4. INSPECT TOTAL COUNTER MODULE ECU


    1. Check malfunction disappear when a known good total counter module ECU is installed.

      A B
      Malfunction does not disappear Malfunction disappear

    B

    REPLACE TOTAL COUNTER MODULE ECU

    A

    REPLACE METER CIRCUIT PLATE

  5. INSPECT ECM


    1. A01KFDEE01
      A01KHJTE01

      Remove the ECM with connectors still connected.

    2. Check the signal waveform.


      1. Start engine.

      2. Connect the oscilloscope to the terminal TACH and E1 of ECM.

      3. Check the signal waveform.

        Text in Illustration
        *a ECM terminals
        *b 2 Pulse/Rev.

    NG

    CHECK AND REPLACE ECM

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  6. INSPECT EMISSION CONTROL ECU


    1. A01KHVZE01
      A01KIPRE01

      Remove the emission control ECU with connectors still connected.

    2. Check the signal waveform.


      1. Start engine.

      2. Connect the oscilloscope to the terminal TAC and E1 of emission control ECU.

      3. Check the signal waveform.

        Text in Illustration
        *a Emission control ECU terminals
        *b 5L Engine
        *c 18.5 Pulse/Rev.

    NG

    REPLACE EMISSION CONTROL ECU

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  7. INSPECT COMBINATION METER ASSEMBLY


    1. A01KG36E01
      A01KIHEE01

      Remove the combination meter assembly with connectors still connected.

    2. Check the signal waveform.


      1. Start engine

      2. Connect the oscilloscope to the terminal C7-13 and C7-5 of combination meter assembly.

      3. Check the signal waveform.

        Text in Illustration
        *a 18.5 Pulse/Rev.

    OK

    INSPECT ENGINE TACHOMETER ASSEMBLY Click here

    NG

  8. INSPECT REVOLUTION DETECTOR ASSEMBLY


    1. A01KF73E01

      Remove the revolution detector assembly.

    2. Check resistance.


      1. Measure resistance between terminals 1 and 2 of revolution detector assembly.

        Standard
        730 Ω

    NG

    CHECK AND REPLACE DETECTOR ASSEMBLY, REVOLUTION

    OK

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  9. INSPECT ENGINE TACHOMETER ASSEMBLY


    1. A01KGFUE01

      Remove the combination meter assembly.

    2. Check resistance of engine tachometer assembly.


      1. Measure resistance between terminals of the engine tachometer assembly, as shown in the chart.

        Standard: resistance
        Tester connection Standard resistance (Ω)
        A - D Approx. 160 Ω
        B - C Approx. 160 Ω

    NG

    REPLACE ENGINE TACHOMETER ASSEMBLY

    OK

  10. INSPECT TOTAL COUNTER MODULE ECU


    1. Check malfunction disappear when a known good total counter module ECU is installed.

      A B
      Malfunction does not disappear Malfunction disappear

    B

    REPLACE TOTAL COUNTER MODULE ECU

    A

    REPLACE METER CIRCUIT PLATE