DTC P0222: Throttle
Position Sensor (sub) Circuit Low Input
CIRCUIT OPERATION
- A 5-volt power supply is applied on the throttle position
sensor (sub) power terminal (terminal No. 5) from the ECM (terminal No. 12).
- A voltage that is according to the throttle opening angle is sent to the ECM (terminal
No. 11) from the throttle position sensor (sub) output terminal (terminal No. 6).
- The ground terminal (terminal No. 3) is grounded with ECM (terminal No. 13).
TECHNICAL DESCRIPTION
- The throttle position sensor (sub) outputs voltage which
corresponds to the throttle valve opening angle.
- The ECM 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
MONITOR EXECUTION CONDITIONS (Other monitor and Sensor)
Other Monitor (There is no temporary DTC stored in memory
for the item monitored below)
Sensor (The sensor below is determined to be normal)
DTC SET CONDITIONS
Logic Flow Chart
Check Condition
- Ignition switch is "ON" position.
Judgement Criterion
- Throttle position sensor (sub) output voltage should be 0.2 volt or less for 0.3 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.
- ECM failed.
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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
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STEP 1. Using scan tool MB991958, check data list item
15: Throttle Position Sensor (sub).
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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.
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(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 4.0 volts or more when the throttle valve is fully
closed with your finger.
- Output voltage should be 1.0 volt or less 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?
It can be assumed that this malfunction is intermittent. Refer to GROUP 00, How
to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions .
Go to Step 2.
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STEP 2. Check harness connector B-10 at throttle position sensor for
damage.
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Q.
Is the harness connector in good condition?
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Go to Step 3.
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Repair or replace it. Refer to GROUP 00E, Harness Connector Inspection .
Then go to Step 11.
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STEP 3. Measure the sensor supply voltage at throttle position sensor
harness side connector B-10.
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(1)Disconnect the connector B-10 and measure at the harness side.
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(2)Turn the ignition switch to the "ON" position.
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(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?
Go to Step 7.
Go to Step 4.
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STEP 4. Check harness connector B-108 at ECM for damage.
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Q.
Is the harness connector in good condition?
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Go to Step 5.
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Repair or replace it. Refer to GROUP 00E, Harness Connector Inspection .
Then go to Step 11.
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STEP 5. Check for open circuit and short circuit to ground between
throttle position sensor connector B-10 (terminal No. 5) and ECM connector B-108 (terminal No.
12).
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Q.
Is the harness wire in good condition?
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Go to Step 6.
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Repair it. Then go to Step 11.
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STEP 6. Using scan tool MB991958, check data list item 15: Throttle
Position Sensor (sub).
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(1)Turn the ignition switch to the "ON" position.
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(2)Detach the intake air hose at the throttle body.
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(3)Disconnect the connector of the throttle position sensor.
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(4)Use test harness special tool (MB991658) to connect only terminals No. 3, No. 4,
No. 5, and No. 6.
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(5)Set scan tool MB991958 to the data reading mode for item 15, Throttle Position
Sensor (sub).
- Output voltage should be 4.0 volts or more when the throttle valve is fully
closed with your finger.
- Output voltage should be 1.0 volt or less when the throttle valve is fully open
with your finger.
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(6)Turn the ignition switch to the "LOCK" (OFF) position.
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Q.
Is the sensor operating properly?
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It can be assumed that this malfunction is intermittent. Refer to GROUP 00, How
to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions .
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Replace the ECM. When the ECM is replaced, register the ID code. Refer to GROUP
42B, ID Code Registration Necessity Judgment Table <Vehicles with KOS> or
GROUP 42C, ID Codes Registration Judgment Table <Vehicles with WCM> .
Then go to Step 11.
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STEP 7. Check harness connector B-108 at ECM for damage.
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Q.
Is the harness connector in good condition?
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Go to Step 8.
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Repair or replace it. Refer to GROUP 00E, Harness Connector Inspection .
Then go to Step 11.
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STEP 8. Check for harness damage between throttle position sensor
connector B-10 (terminal No. 5) and ECM connector B-108 (terminal No. 12).
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Q.
Is the harness wire in good condition?
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Go to Step 9.
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Repair it. Then go to Step 11.
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STEP 9. Check for open circuit, short circuit to ground and harness
damage between throttle position sensor connector B-10 (terminal No. 6) and ECM connector B-108
(terminal No. 11).
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Q.
Is the harness wire in good condition?
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Go to Step 10.
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Repair it. Then go to Step 11.
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STEP 10. Replace the throttle body assembly.
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(1)Replace the throttle body assembly.
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(2)Turn the ignition switch to the "ON" position.
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(3)After the DTC has been deleted, read the DTC again.
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(4)Turn the ignition switch to the "LOCK" (OFF) position.
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Replace the ECM. When the ECM is replaced, register the ID code. Refer to GROUP
42B, ID Code Registration Necessity Judgment Table <Vehicles with KOS> or
GROUP 42C, ID Codes Registration Judgment Table <Vehicles with WCM> .
Then go to Step 11.
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The inspection is complete.
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STEP 11. Using scan tool MB991958, read the diagnostic trouble code
(DTC).
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(1)Turn the ignition switch to the "ON" position.
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(2)After the DTC has been deleted, read the DTC again.
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(3)Turn the ignition switch to the "LOCK" (OFF) position.
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Retry the troubleshooting.
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The inspection is complete.
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