LEMON Manuals: Even more car manuals for everyone
Home >> Lexus >> 2017 >> ES 300h >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Meter / Gauge System (Diagnostic Codes & Symptom Tests) >> Symptom Tests >> Tachometer Malfunction [07/2015 - ] >> Procedure

Tachometer Malfunction [07/2015 - ]: Procedure

  1. CHECK CAN COMMUNICATION SYSTEM 
    1. Check if CAN communication DTCs are output. Refer to DIAGNOSIS SYSTEM [07/2015 - 08/2016] Refer to DIAGNOSIS SYSTEM [08/2016 - ] w/ Central Gateway ECU. Refer to DIAGNOSIS SYSTEM [07/2015 - 08/2016] Refer to DIAGNOSIS SYSTEM [08/2016 - ] w/o Central Gateway ECU

      Result

      Result Proceed to
      CAN communication DTCs are not output. A
      CAN communication DTCs are output (w/ Central Gateway ECU). B
      CAN communication DTCs are output (w/o Central Gateway ECU). C

    Result:  B

    B 

    GO TO CAN COMMUNICATION SYSTEM 

    Refer to HOW TO PROCEED WITH TROUBLESHOOTING [07/2015 - ]

    Result:  C

    C 

    GO TO CAN COMMUNICATION SYSTEM 

    Refer to HOW TO PROCEED WITH TROUBLESHOOTING [07/2015 - ]

    Result:  A

    A 

    See step  2

  2. PERFORM ACTIVE TEST USING TECHSTREAM (TACHO METER OPERATION) 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Body Electrical / Combination Meter / Active Test.
    5. Perform the Active Test according to the display on the Techstream.
      COMBINATION METER

      Tester Display Test Part Control Range Diagnostic Note
      Tacho Meter Operation Tachometer OFF, 0, 1000, 2000, 3000, 4000, 5000, 6000, 7000 -

      OK

      Tachometer indication is normal.

    Result:  NG

    NG 

    REPLACE COMBINATION METER ASSEMBLY 

    Refer to REMOVAL [07/2015 - ]

    Result:  OK

    OK 

    See step  3

  3. READ VALUE USING TECHSTREAM (ENGINE RPM) 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus: Body Electrical / Combination Meter / Data List.
    5. Read the Data List according to the display on the Techstream.
      COMBINATION METER

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Engine Rpm Engine speed/Min.: 0 rpm, Max.: 12750 rpm Almost the same as actual engine speed -

      OK

      Engine speed displayed on the Techstream is almost the same as the tachometer indication.

      HINT: 

      • When the Data List values and tachometer values match, a signal output error of the hybrid vehicle control ECU assembly or an internal malfunction of the combination meter assembly is suspected.
      • When the Data List values and tachometer values do not match, an internal malfunction of the combination meter assembly is suspected.

    Result:  NG

    NG 

    REPLACE COMBINATION METER ASSEMBLY 

    Refer to REMOVAL [07/2015 - ]

    Result:  OK

    OK 

    See step  4

  4. CHECK HYBRID CONTROL SYSTEM 
    1. Check if hybrid control system DTCs are output. Refer to DTC CHECK / CLEAR [07/2015 - ]

      Result

      Result Proceed to
      DTCs are not output. A
      DTCs are output. B

    Result:  B

    B 

    GO TO HYBRID CONTROL SYSTEM 

    Refer to HOW TO PROCEED WITH TROUBLESHOOTING [07/2015 - ]

    Result:  A

    A 

    See step  5

  5. READ VALUE USING TECHSTREAM (ENGINE REVOLUTION, ENGINE RPM) 
    1. Connect the Techstream to the DLC3.
    2. Turn the power switch on (IG).
    3. Turn the Techstream on.
    4. Enter the following menus:
      1. for Hybrid Control: Powertrain / Hybrid Control / Data List.
      2. for Combination Meter: Body Electrical / Combination Meter / Data List.
    5. Read the Data List according to the display on the Techstream.
      HYBRID CONTROL

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Engine Revolution Engine speed/
      Min.: 0 rpm, Max.: 16383 rpm      		 While idling after the engine is warmed up and in inspection mode:
      Approximately 900 rpm
      While driving at a constant speed:
      No significant fluctuation      		 -
      COMBINATION METER

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Engine Rpm Engine speed/Min.: 0 rpm, Max.: 12750 rpm Almost the same as actual engine speed -

      Result

      Result Proceed to
      The data list values of the ECUs do not match. A
      The data list values of the ECUs match. B

      HINT: 

      • When the Data List values of the ECUs match, an internal malfunction of the hybrid vehicle control ECU assembly is suspected.
      • When the Data List values of the ECUs do not match, a signal output error of the hybrid vehicle control ECU assembly or an internal malfunction of the combination meter assembly is suspected.

    Result:  B

    B 

    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY 

    Refer to REMOVAL [07/2015 - ]

    Result:  A

    A 

    See step  6

  6. REPLACE COMBINATION METER ASSEMBLY 
    1. Replace the combination meter assembly with a new one. Refer to REMOVAL [07/2015 - ]

      OK

      The operation of the tachometer returns to normal.

    Result:  OK

    OK 

    END 

    Result:  NG

    NG 

    REPLACE HYBRID VEHICLE CONTROL ECU ASSEMBLY 

    Refer to REMOVAL [07/2015 - ]

scientia non olet · About LEMON Manuals