Code No. P061A: Torque Monitoring


FUNCTION



  • Compares the actual torque signal computed from an air flow sensor signal with the driver demand torque signal computed from an accelerator pedal position sensor signal.

TROUBLE JUDGMENT


Check Conditions
  • Engine speed is more than 500 r/min.
  • Volumetric efficiency is more than 16 %.
Judgement Criterion
  • Difference between the actual torque signal and the requested torque signal is more than 50 N·m for 1 second.

FAIL-SAFE AND BACKUP FUNCTION



  • Throttle opening degree position is in default position.

PROBABLE CAUSES



  • Failed throttle valve control servo
  • Harness damage in throttle valve control servo circuit or loose connector contact.
  • Failed intake air system
  • There is some foreign matter around air flow sensor
  • Failed engine-ECU

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III diagnosis code

Q. Is any other diagnosis code than P061A set?
Inspection chart for diagnosis code (Refer to ).
Go to Step 2.

STEP 2. M.U.T.-III data list

  • Data list reference table (Refer to ).

  1. Item 10: Air flow sensor
  2. Item 11: Accelerator pedal position sensor (main)
  3. Item 12: Accelerator pedal position sensor (sub)

Q. Are the check results normal?
Go to Step 3.
Perform the diagnosis code classified check procedure for the sensor that has shown an abnormal data value. Inspection chart for diagnosis code (Refer to ).

STEP 3. Check air intake from inlet hose and inlet manifold.

Q. Is the check result normal?
Go to Step 4.
Repair.

STEP 4. Check air flow sensor

  • Check that there is not foreign matter around air flow sensor

Q. Is the check result normal?
Go to Step 5.
Repair.

STEP 5. Check throttle valve control servo itself.

  • Throttle valve control servo check (Refer to ).

Q. Is the check result normal?
Go to Step 6.
Replace the throttle body assembly.

STEP 6. Check harness between electronic-controlled throttle valve connector terminal and engine-ECU connector terminal ETV-.

  • Check output line for damage.

Q. Is the check result normal?
Go to Step 7.
Repair or replace the connector, or repair the damaged harness wire.

STEP 7. Check harness between electronic-controlled throttle valve connector terminal and engine-ECU connector terminal ETV+.

  • Check signal line for damage.

Q. Is the check result normal?
Go to Step 8.
Repair the damaged harness wire.

STEP 8. M.U.T.-III diagnosis code

  • Reconfirmation of diagnosis code.

Q. Is diagnosis code set?
Replace the engine-ECU.
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).