Code No. P0223: Throttle Position Sensor (Sub) Circuit High Input








OPERATION



  • A power voltage of 5 V is applied to the electronic-controlled throttle valve (terminal No. 2) from the engine-A/T-ECU (terminal No. 106).
  • The power voltage is earthed to the engine-A/T-ECU (terminal No. 105) from the electronic-controlled throttle valve (terminal No. 4).
  • The sensor signal is inputted to the engine-A/T-ECU (terminal No. 113) from the electronic-controlled throttle valve output terminal (terminal No. 3).

FUNCTION



  • The throttle position sensor converts the throttle valve position into voltage and inputs it into the engine-A/T-ECU.
  • The engine-A/T-ECU controls the throttle valve position.

TROUBLE JUDGMENT


Check Condition
  • Ignition switch is in "ON" position.
Judgment Criterion
  • Throttle position sensor (sub) output voltage is more than 4.8 V.

PROBABLE CAUSES



  • Failed throttle position sensor (sub)
  • Open/short circuit in throttle position sensor (sub) circuit or loose connector contact
  • Failed engine-A/T-ECU

DIAGNOSIS PROCEDURE

STEP 1. M.U.T.-III data list

  • Refer to Data List Reference Table .

  1. Item 15: Throttle position sensor (sub)

Q. Is the check result normal?
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).
Go to Step 2 .

STEP 2. Connector check: B-31 electronic-controlled throttle valve connector

Q. Is the check result normal?
Go to Step 3 .
Repair or replace the connector.

STEP 3. Perform resistance measurement at B-31 electronic-controlled throttle valve connector.

  • Disconnect connector, and measure at harness side.
  • Resistance between terminal No. 4 and earth.
OK: Continuity (2 Ω or less)

Q. Is the check result normal?
Go to Step 7 .
Go to Step 4 .

STEP 4. Connector check: D-217 engine-A/T-ECU connector

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

STEP 5. Check harness between B-31 (terminal No. 4) electronic-controlled throttle valve connector and D-217 (terminal No. 105) engine-A/T-ECU connector.

  • Check earthing line for open circuit and damage.

Q. Is the check result normal?
Go to Step 6 .
Repair the damaged harness wire.

STEP 6. M.U.T.-III data list

  • Refer to Data List Reference Table .

  1. Item 15: Throttle position sensor (sub)

Q. Is the check result normal?
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).
Replace the engine-A/T-ECU.

STEP 7. M.U.T.-III diagnosis code

  • Reconfirm the diagnosis code after the replacement of the electronic-controlled throttle valve.

Q. Is the diagnosis code set?
Replace the engine-A/T-ECU.
Check end.