Code No. P1237: Trustful Check Accelerator Pedal Position Sensor




FUNCTION



  • Compare the output value of the accelerator pedal position sensor (main) with that of the accelerator pedal position sensor (sub).

TROUBLE JUDGMENT


Check Condition
  • Change of accelerator pedal position sensor (sub) output voltage per 40 milliseconds is lower than 0.06 V.
Judgment Criterion
  • Voltage obtained with the formula given below is 0.4 V or higher: accelerator pedal position sensor (main) output voltage - accelerator pedal position sensor (sub) output voltage.

PROBABLE CAUSES



  • Failed accelerator pedal position sensor
  • Harness damage in accelerator pedal position sensor circuit or loose connector contact
  • Failed engine-ECU

DIAGNOSIS PROCEDURE


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


Q. Is any other diagnosis code than P1237 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 11: Accelerator pedal position sensor (main)
  2. Item 12: Accelerator pedal position sensor (sub)

Q. Are the check results normal?

Replace the engine-ECU.
Perform the diagnosis code classified check procedure for the sensor that has shown an abnormal data value (Refer to Inspection Chart for Diagnosis Code ).