P0223

DTC P0223: Throttle Position Sensor (sub) Circuit High Input

CAUTION: If DTC P0223 has been set, TCL related DTC U1120 is also set. After P0223 has been diagnosed, don't forget to erase DTC U1120.

Throttle Position Sensor (sub) Circuit:

CIRCUIT OPERATION
- A 5-volt power supply is applied on the throttle position sensor (sub) power terminal (terminal No. 5) from the PCM (terminal No. 94).
- A voltage that is according to the throttle opening angle is sent to the PCM (terminal No. 98) from the throttle position sensor (sub) output terminal (terminal No. 6).
- The ground terminal (terminal No. 3) is grounded with PCM (terminal No. 95).

TECHNICAL DESCRIPTION
- The throttle position sensor (sub) outputs voltage which corresponds to the throttle valve opening angle.
- The PCM checks whether the voltage is within a specified range.

DESCRIPTIONS OF MONITOR METHODS
Throttle position sensor (sub) output voltage is out of specified range.

MONITOR EXECUTION
Continuous.

MONITOR EXECUTION CONDITIONS (Other monitor and Sensor)

Other Monitor (There is no temporary DTC stored in memory for the item monitored below)
- Not applicable

Sensor (The sensor below is determined to be normal)
- Not applicable

DTC SET CONDITIONS

Logic Flow Chart:

Check Condition
- Ignition switch is "ON" position.

Judgement Criterion
- Throttle position sensor (sub) output voltage should be 4.8 volts or more for 0.5 second.

OBD-II DRIVE CYCLE PATTERN
None.

TROUBLESHOOTING HINTS (The most likely causes for this code to be set are:)
- Throttle position sensor failed.
- Open throttle position sensor (sub) circuit, harness damage, or connector damage.
- PCM failed.

DIAGNOSIS

Required Special Tools:
- MB991958: Scan tool (M.U.T.-III Sub Assembly)
- MB991824: V.C.I.
- MB991827: USB Cable
- MB991910: Main Harness A

- MB991658: Test Harness

STEP 1. Using scan tool MB991958, check data list item 15: Throttle Position Sensor (sub).

CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK"(OFF) position before connecting or disconnecting scan tool MB991958.

1. Connect scan tool MB991958 to the data link connector.
2. Turn the ignition switch to the "ON" position.
3. Detach the intake air hose at the throttle body.
4. Disconnect the connector of the throttle position sensor.
5. Use test harness special tool (MB991658) to connect only terminals No. 3, No. 4, No. 5, and No. 6.
6. Set scan tool MB991958 to the data reading mode for item 15, Throttle Position Sensor (sub).
- Output voltage should be between 2.2 and 2.8 volts when the throttle valve is fully closed with your finger.
- Output voltage should be 4.6 volts or more when the throttle valve is fully open with your finger.

7. Turn the ignition switch to the "LOCK"(OFF) position.

Q: Is the sensor operating properly?

YES : It can be assumed that this malfunction is intermittent.

NO : Go to Step 2.

STEP 2. Check harness connector B-06 at throttle position sensor for damage.

Q: Is the harness connector in good condition?

YES : Go to Step 3.

NO : Repair or replace it. Then go to Step 8.

STEP 3. Check the continuity at throttle position sensor harness side connector B-06.

1. Disconnect the connector B-06 and measure at the harness side.

2. Measure the continuity between terminal No. 3 and ground.
- Continuity (2 ohms or less)

Q: Does continuity exist?

YES : Go to Step 7.

NO : Go to Step 4.

STEP 4. Check harness connector B-22 at PCM for damage.

Q: Is the harness connector in good condition?

YES : Go to Step 5.

NO : Repair or replace it. Then go to Step 8.

STEP 5. Check for open circuit and harness damage between throttle position sensor connector B-06 (terminal No. 3) and PCM connector B-22 (terminal No. 95).

Q: Is the harness wire in good condition?

YES : Go to Step 6.

NO : Repair it. Then go to Step 8.

STEP 6. Using scan tool MB991958, check data list item 15: Throttle Position Sensor (sub).

CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK"(OFF) position before connecting or disconnecting scan tool MB991958

1. Connect scan tool MB991958 to the data link connector.
2. Turn the ignition switch to the "ON" position.
3. Detach the intake air hose at the throttle body.
4. Disconnect the connector of the throttle position sensor.
5. Use test harness special tool (MB991658) to connect only terminals No. 3, No. 4, No. 5, and No. 6.
6. Set scan tool MB991958 to the data reading mode for item 15, Throttle Position Sensor (sub).
- Output voltage should be between 2.2 and 2.8 volts when the throttle valve is fully closed with your finger.
- Output voltage should be 4.6 volts or more when the throttle valve is fully open with your finger.

7. Turn the ignition switch to the "LOCK"(OFF) position.

Q: Is the sensor operating properly?

YES : It can be assumed that this malfunction is intermittent.

NO : Replace the PCM. When the PCM is replaced, register the encrypted code. Then go to Step 8.

STEP 7. Replace the throttle body assembly.

1. Replace the throttle body assembly.
2. Turn the ignition switch to the "ON" position.
3. After the DTC has been deleted, read the DTC again.
4. Turn the ignition switch to the "LOCK" (OFF) position.

Q: Is DTC P0223 set?

YES : Replace the PCM. When the PCM is replaced, register the encrypted code. Then go to Step 8.

NO : The inspection is complete.

STEP 8. Using scan tool MB991958, read the diagnostic trouble code (DTC).