Code No. P0222: Throttle Position Sensor (sub) Circuit Low Input
OPERATION
- A power voltage of 5 V is applied to the electronic-controlled
throttle valve (terminal No. 5) from the engine-ECU (terminal No. 12).
- The power voltage is earthed to the engine-ECU (terminal No. 13) from the electronic-controlled throttle
valve (terminal No. 3).
- The sensor signal is inputted to the engine-ECU (terminal No. 11) from the electronic-controlled throttle
valve output terminal (terminal No. 6).
FUNCTION
- The throttle position sensor converts the throttle valve
position into voltage and inputs it into the engine-ECU.
- The engine-ECU controls the throttle valve opening angle.
TROUBLE JUDGMENT
Check Condition
- Ignition switch is "ON" position.
- Throttle position sensor (sub) output voltage is less than 0.2 V.
FAIL-SAFE AND BACKUP FUNCTION
- Throttle opening degree is restricted.
- Throttle opening degree position is in default position if throttle position sensor
(main) fails.
PROBABLE CAUSES
- Failed throttle position sensor (sub)
- Open/short circuit or harness damage in throttle position sensor (sub) circuit or
loose connector contact
- Failed engine-ECU
DIAGNOSIS PROCEDURE |
STEP 1. M.U.T.-III data list |
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Q.
Is the check result normal?
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Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection
Service Points - How to Cope with Intermittent Malfunctions ). |
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Go to Step 2 . |
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STEP 2. Connector check: B-12 electronic-controlled throttle valve connector |
Q.
Is the check result normal?
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Go to Step 3 . |
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Repair or replace the connector. |
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STEP 3. Perform voltage measurement at B-12 electronic-controlled throttle valve connector. |
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OK: 4.9 - 5.1 V |
Q.
Is the check result normal?
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Go to Step 7 . |
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Go to Step 4 . |
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STEP 4. Connector check: B-26 engine-ECU connector |
Q.
Is the check result normal?
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Go to Step 5 . |
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Repair or replace the connector. |
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STEP 5. Check harness between B-12 (terminal No. 5) electronic-controlled throttle valve connector and B-26 (terminal No. 12) engine-ECU connector. |
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Q.
Is the check result normal?
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Go to Step 6 . |
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Repair the damaged harness wire. |
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STEP 6. M.U.T.-III data list |
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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 ). |
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Replace the engine-ECU. |
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STEP 7. Connector check: B-26 engine-ECU connector |
Q.
Is the check result normal?
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Go to Step 8 . |
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Repair or replace the connector. |
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STEP 8. Check harness between B-12 (terminal No. 5) electronic-controlled throttle valve connector and B-26 (terminal No. 12) engine-ECU connector. |
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Q.
Is the check result normal?
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Go to Step 9 . |
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Repair the damaged harness wire. |
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STEP 9. Check harness between B-12 (terminal No. 6) electronic-controlled throttle valve connector and B-26 (terminal No. 11) engine-ECU connector. |
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Q.
Is the check result normal?
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Go to Step 10 . |
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Repair the damaged harness wire. |
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STEP 10. Replace the electronic-controlled throttle valve |
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Q.
Is the diagnosis code set?
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Replace the engine-ECU. |
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Check end. |
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