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 500 r/min or higher.
  • Volumetric efficiency is 16 % or higher.
Judgement Criterion
  • For 1 second, the difference between the actual torque signal and the requested torque signal is 50 N·m.

PROBABLE CAUSE



  • Failed engine-ECU

DIAGNOSIS PROCEDURE


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


Q. Is any other diagnosis code than P1241 output?

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 intake hose and inlet manifold.


Q. Is the check result normal?

Go to Step 4 .
Repair.

STEP 4. Check throttle valve control servo itself.



  • Check throttle valve control servo (Refer to ).

Q. Is the check result normal?

Go to Step 5 .
Replace the throttle body assembly.

STEP 5. Connector check: B-20 electronic control throttle valve connector and B-29 engine-ECU connector


Q. Are the check results normal?

Go to Step 6 .
Repair or replace the connector.

STEP 6. Check harness between B-20 (terminal No. 2) electronic control throttle valve connector and B-29 (terminal No. 16) engine-ECU connector.



  • Check output line for damage.

Q. Is the check result normal?

Go to Step 7 .
Repair the damaged harness wire.

STEP 7. Check harness between B-20 (terminal No. 1) electronic control throttle valve connector and B-29 (terminal No. 15) 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. 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 ).