Code No. P1241: 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 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 trash around air flow sensor
  • Failed engine-ECU

DIAGNOSIS PROCEDURE

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

Q. Is any other diagnosis code than P1241 set?
Inspection chart for diagnosis code (Refer to ).
Go to Step 2 .

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

  • Refer to Data List Reference Table .

  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 (Refer to Inspection Chart for Diagnosis Code ).

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 trash around air flow sensor

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

STEP 5. Check throttle valve control servo itself.

  • Check throttle valve control servo (Refer to ).

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

STEP 6. Connector check: B-11 electronic-controlled throttle valve connector and B-08 engine-ECU connector

Q. Are the check results normal?
Go to Step 7 .
Repair or replace the connector.

STEP 7. Check harness between B-11 (terminal No. 2) electronic-controlled throttle valve connector and B-08 (terminal No. 16) engine-ECU connector.

  • Check output line for damage.

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

STEP 8. Check harness between B-11 (terminal No. 1) electronic-controlled throttle valve connector and B-08 (terminal No. 15) engine-ECU connector.

  • Check output line for damage.

Q. Is the check result normal?
Go to Step 9 .
Repair the damaged harness wire.

STEP 9. 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 ).