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Home >> Toyota >> 2009 >> Corolla XLE, 1.8 L >> Repair and Diagnosis >> Accessories & Equipment >> Gauges & Instrument Panels >> Meter / Gauge / Display >> Meter / Gauge System >> Tachometer Malfunction >> Inspection Procedure

Inspection Procedure

  1. CHECK CAN COMMUNICATION SYSTEM 
    1. Check if CAN communication DTC is output (See DIAGNOSIS SYSTEM ).

      Result 

      RESULT REFERENCE

      Result Proceed to
      CAN communication DTC is not output. A
      CAN communication OTC Is output. B

      B: GO TO CAN COMMUNICATION SYSTEM  (See HOW TO PROCEED WITH TROUBLESHOOTING )

      A: Go to next step 

  2. PERFORM ACTIVE TEST USING TECHSTREAM (TACHO METER OPERATION) 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn the Techstream on.
    4. Enter the following menus: Body Electrical / Combination Meter / Active Test.
    5. Check the operation by referring to the values in the table below.

      Combination Meter 

      COMBINATION METER REFERENCE CHART

      Tester Display Test Part Control Range Diagnostic Note
      Tacho Meter Operation Tachometer 0, 1000, 2000, 3000, 4000, 5000, 6000, 7000 (rpm) Confirm that the vehicle is stopped, engine idling

      OK: 

      Tachometer indication is normal. 

      NG: REPLACE COMBINATION METER  (See REMOVAL )

      OK: Go to next step 

  3. READ VALUE USING TECHSTREAM (ENGINE RPM) 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch on.
    3. Turn the Techstream on.
    4. Enter the following menus: Body Electrical / Combination Meter / Data List.
    5. Check the values by referring to the values in the table below.

      Combination Meter 

      COMBINATION METER REFERENCE CHART

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Engine Rpm Engine speed/Min.: 0 rpm, Max.: 12750 rpm Almost same as actual engine speed (Tachometer indication) If data received from the ECM exceeds the range that can be displayed on the meter, the meter continues to display the maximum value of the range.

      Result 

      RESULT REFERENCE

      Result Proceed to
      Tachometer Indication is differ from the Techstream indication. A
      Tachometer indication Is the same as the Techstream indication. B

      B: Go to step 4 

      A: REPLACE COMBINATION METER  (See REMOVAL )

  4. READ VALUE USING TECHSTREAM (ENGINE SPEED) 
    1. Connect the Techstream to the DLC3.
    2. Turn the ignition switch to ON.
    3. Turn the Techstream ON.
    4. Enter the following menus: Powertrain / Engine and ECT / Data List.
    5. Check the values by referring to the table below.

      Engine and ECT 

      ITEM RANGE REFERENCE

      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Engine Speed Engine speed/Min.: 0 rpm, Max.: 16383.75 rpm Almost same as actual engine speed (Tachometer indication) -

      OK: 

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

      Result 

      RESULT REFERENCE

      Result Proceed to
      OK A
      NG (for 2AZ-FE) B
      NG (for 2ZR-FE) C

      B: GO TO SFI SYSTEM (for 2AZ-FE)  (See HOW TO PROCEED WITH TROUBLESHOOTING )

      C: GO TO SFI SYSTEM (for 2ZR-FE)  (See HOW TO PROCEED WITH TROUBLESHOOTING )

      A: Go to next step 

  5. REPLACE ECM 
    1. Replace the ECM with a new or a known good one (See REMOVAL for 2AZ-FE, REMOVAL for 2ZR-FE).

      OK: 

      The operation of the tachometer returns to normal. 

      NG: REPLACE COMBINATION METER  (See REMOVAL )

      OK: END 

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