Code No. P0715: Input Shaft Speed Sensor System




DIAGNOSIS CODE SET CONDITIONS




PROBABLE CAUSES



  • Malfunction of the Input shaft speed sensor system circuit
  • Damaged harness or connector
  • Malfunction of the Input shaft speed sensor
  • Malfunction of the A/T-ECU
  • Malfunction of the input shaft speed sensor rotor (A/T assembly)

DIAGNOSIS PROCEDURE


STEP 1. Check the A/T-ECU terminal voltage and frequency.


[A/T-ECU connector (harness side, connected)]
Check that the voltage between PGA- terminal and GND1 or GND2 terminal is 0 V, and then check the frequency of PGA1 terminal.

  • At D range, and the engine speed is 700 r/min: Approx. 353 Hz

Q. Is the check result normal?

Go to Step 8.
Go to Step 2.

STEP 2. Check the power supply and sensor earth.


[input shaft speed sensor connector (harness side, disconnected)]

  • With the ignition switch ON: Power supply terminal to earth terminal → System voltage

Q. Is the check result normal?

Go to Step 3.
Go to Step 4.

STEP 3. Check for continuity in PGA1 line between the input shaft speed sensor connector and A/T-ECU connector.


When the continuity check result is OK, check that the wiring harness is not shorted to the body and other wiring harness.

Q. Is the check result normal?

Replace the input shaft speed sensor with the one of the same transmission of the same model. Then go to Step 5.
Repair the connector(s) or wiring harness, and then go to Step 8.

STEP 4. Check the path between the battery and the input shaft speed sensor.



  • Check the power supply line for an open/short circuit between the battery and input shaft speed sensor connector.
  • Check for a blown fuse.

Q. Is the check result normal?

Go to Step 6.
Repair the connector(s) or wiring harness.

STEP 5. After replacing the input shaft speed sensor, drive the vehicle for a while, and then check the diagnosis code again.


Q. Is the check result normal?

Replace the input shaft speed sensor.
Replace the A/T-ECU. Then go to Step 9.

STEP 6. Check for continuity in PGA- line between the input shaft speed sensor connector and A/T-ECU connector.


When the continuity check result is OK, check that the wiring harness is not shorted to the body and other wiring harness.

Q. Is the check result normal?

Go to Step 7.
Repair the connector(s) or wiring harness.

STEP 7. Check the A/T-ECU connector pin terminal and the connection status.


Q. Is there a failure point?

Repair or replace the failure section.
Replace the A/T-ECU.

STEP 8. Drive the vehicle for a while.


Check that the normal code is displayed.

Q. Is the check result normal?

The procedure is complete.
Replace the A/T-ECU.

STEP 9. Diagnosis code recheck.



  1. Erase the diagnosis code.
  2. Drive the vehicle at 40 km/h or more (engine speed at 1,600 r/min or more).
  3. Check if the diagnosis code is set.

Q. Is the diagnosis code set?

Remove the A/T. Carry out the internal check and repair the defective part (the input shaft speed sensor rotor may be defective).
The procedure is complete.