Code No. P0225: Throttle Position Senser (Sub) System

OPERATION

A power voltage of 5 V is applied to the electronic-controlled throttle valve (terminal No. 5) from the engine-A/T-ECU (terminal No. 106).
A power voltage is earthed to the engine-A/T-ECU (terminal No. 105) from the electronic-controlled throttle valve (terminal No. 3).
The sensor signal is inputted to the engine-A/T-ECU (terminal No. 113) from the electronic-controlled throttle valve (terminal No. 6).

FUNCTION

The throttle position sensor convents 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 Conditions

Ignition switch is in ON position.

Judgment Criteria

Throttle position sensor (main) output voltage is 2.2 V or less.

Throttle position sensor (sub) output voltage is 4.8 V or more.

Check Conditions

Ignition switch is in ON position.
Throttle position sensor (main) output voltage is between 0.2 and 4.8 V.
Throttle position sensor (sub) output voltage is between 2.2 and 4.8 V.

Judgment Criteria

Throttle position sensor (main) output voltage is 2.5 V or more and throttle position sensor (sub) output voltage is 4.2 V or less.

When throttle position sensor (main) output voltage is 2.5 V or less, voltage obtained with the formula given below is 0.3 volt or more:
Throttle position sensor (main) output voltage -[Throttle position sensor (sub) output voltage - 2 V]

PROBABLE CAUSE

Failed throttle position sensor
Open/short circuit in throttle position sensor (sub) circuit or loose connector contact
Harness damage in throttle position sensor (main) 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 .

Item 14: Throttle position sensor (sub)

Q. Is the check result normal?

	Go to Step 2 .

	Go to Step 3 .

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

Refer to Data List Reference Table .

Item 79: Throttle position sensor (main)

Q. Is the check result normal?

	Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points .

	Check throttle position sensor (main) system (Refer to Code No. P0120 ).

STEP 3. Connector check: B-06 electronic-controlled throttle valve connector

Q. Is the check result normal?

Go to Step 4 .

Repair or replace.

STEP 4. Perform voltage measurement at B-06 electronic-controlled throttle valve connector.

Disconnect connector, and measure at harness side.
Ignition switch: ON
Voltage between terminal No. 5 and earth.

OK: 4.9 - 5.1 V

Q. Is the check result normal?

Go to Step 8 .

Go to Step 5 .

STEP 5. Connector check: C-113 engine-A/T-ECU connector

Q. Is the check result normal?

Go to Step 6 .

Repair or replace.

STEP 6. Check harness between B-06 (terminal No. 5) electronic-controlled throttle valve connector and C-113 (terminal No. 106) engine-A/T-ECU connector.

Check power supply line for open/short circuit.

Q. Is the check result normal?

Go to Step 7 .

Repair.

STEP 7. M.U.T.-III data list

Refer to Data List Reference Table .

Item 14: Throttle position sensor (sub)

Q. Is the check result normal?

	Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points .

	Replace engine-A/T-ECU.

STEP 8. Perform resistance measurement at B-06 electronic-controlled throttle valve connector.

Disconnect connector, and measure at harness side.
Resistance between terminal No. 3 and earth.

OK: 2 Ω or less

Q. Is the check result normal?

Go to Step 12 .

Go to Step 9 .

STEP 9. Connector check: C-113 engine-A/T-ECU connector

Q. Is the check result normal?

Go to Step 10 .

Repair or replace.

STEP 10. Check harness between B-06 (terminal No. 3) electronic-controlled throttle valve connector and C-113 (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 11 .

Repair.

STEP 11. M.U.T.-III data list

Refer to Data List Reference Table .

Item 14: Throttle position sensor (sub)

Q. Is the check result normal?

	Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points .

	Replace engine-A/T-ECU.

STEP 12. Connector check: C-113 engine-A/T-ECU connector

Q. Is the check result normal?

Go to Step 13 .

Repair or replace.

STEP 13. Check harness between B-06 (terminal No. 5) electronic-controlled throttle valve connector and C-113 (terminal No. 106) engine-A/T-ECU connector.

Check power supply line for damage.

Q. Is the check result normal?

Go to Step 14 .

Repair.

STEP 14. Check harness between B-06 (terminal No. 6) electronic-controlled throttle valve connector and C-113 (terminal No. 113) engine-A/T-ECU connector.

Check output line for open/short circuit and damage.

Q. Is the check result normal?

Go to Step 15 .

Repair.

STEP 15. M.U.T.-III data list

Refer to Data List Reference Table .

Item 14: Throttle position sensor (sub)

Q. Is the check result normal?

	Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points ).

	Replace throttle body assembly. Then go to Step 16 .

STEP 16. M.U.T.-III diagnosis code

Reconfirmation of diagnosis code.

Q. Is the diagnosis code set?

	Replace engine-A/T-ECU.

	Check end.