P0222
DTC P0222: Throttle Position Sensor (Sub) Circuit Low InputThrottle Position Sensor (Sub) Circuit:
CAUTION: If DTC P0222 has been set, TCL related DTC U1120 and ASC related DTC U1433 are also set. After P0222 has been diagnosed, don't forget to erase DTC U1120 and U1433.
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). 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:
Logic Flow Chart
Check Condition
- Ignition switch is "ON" position.
Judgement Criterion
- Throttle position sensor (sub) output voltage should measure 2.25 volts or less for 0.5 second.
OBD-II DRIVE CYCLE PATTERN
TROUBLESHOOTING HINTS (The most likely causes for this code to be set are:)
- Throttle position sensor failed.
- Open or shorted 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 measure between 2,200 and 2,800 millivolts when the throttle valve is fully closed with your finger.
- Output voltage should measure 4,000 millivolts 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. Refer to How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions.
NO: Go to Step 2.
STEP 2. Check harness connector B-05 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 11.
STEP 3. Measure the sensor supply voltage at throttle position sensor harness side connector B-05.
1. Disconnect the connector B-05 and measure at the harness side.
2. Turn the ignition switch to the "ON" position.
3. Measure the voltage between terminal No. 5 and ground
- Voltage should be between 4.9 and 5.1 volts.
4. Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the measured voltage between 4.9 and 5.1 volts?
YES: Go to Step 7.
NO: Go to Step 4.
STEP 4. Check harness connector B-21 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 11.
STEP 5. Check for open circuit and short circuit to ground between throttle position sensor connector B-05 (terminal No. 5) and PCM connector B-21 (terminal No. 94).
Q: Is the harness wire in good condition?
YES: Go to Step 6.
NO: Repair it. Then go to Step 11.
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 measure between 2,200 and 2,800 millivolts when the throttle valve is fully closed with your finger.
- Output voltage should measure 4,000 millivolts 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. Refer to How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions.
NO: Replace the PCM. When the PCM is replaced, register the encrypted code. Refer to Encrypted Code Registration Criteria Table. Then go to Step 11.
STEP 7. Check harness connector B-21 at PCM for damage.
Q: Is the harness connector in good condition?
YES: Go to Step 8.
NO: Repair or replace it. Then go to Step 11.
STEP 8. Check for harness damage between throttle position sensor connector B-05 (terminal No. 5) and PCM connector B-21 (terminal No. 94).
Q: Is the harness wire in good condition?
YES: Go to Step 9.
NO: Repair it. Then go to Step 11.
STEP 9. Check for open circuit, short circuit to ground and harness damage between throttle position sensor connector B-05 (terminal No. 6) and PCM connector B-21 (terminal No. 98).
Q: Is the harness wire in good condition?
YES: Go to Step 10.
NO: Repair it. Then go to Step 11.
STEP 10. 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 P0222 set?
YES: Replace the PCM. When the PCM is replaced, register the encrypted code. Refer to Encrypted Code Registration Criteria Table. Then go to Step 11.
NO: The inspection is complete.
STEP 11. Using scan tool MB991958, read the diagnostic trouble code (DTC).
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. After the DTC has been deleted, read the DTC again.
4. Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC P0222 set?
YES: Retry the troubleshooting.
NO: The inspection is complete.