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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 from the ECM terminal TPS5.
  • A voltage that is according to the throttle opening angle is sent to the ECM terminal TPSS from the throttle position sensor (sub) output terminal.
  • The ground terminal is grounded with ECM terminal TPSE.
 
 
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
  • Continuous
 
 
MONITOR EXECUTION CONDITIONS (Other monitor and Sensor)
Other Monitor (There is no temporary DTC set 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
  • Power supply mode of electric motor switch is ON.
Judgment Criterion
  • Throttle position sensor (sub) output voltage should be 0.2 volt or lower for 0.3 second.
 
 
FAIL-SAFE AND BACKUP FUNCTION
  • Throttle opening degree is restricted.
  • Throttle opening degree position is in default position if throttle position sensor (main) fails.
 
 
OBD-II DRIVE CYCLE PATTERN
  • Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 1 .
 
 
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.

 
 
DIAGNOSIS
Required Special Tool:
  • MB991658: Test Harness
STEP 1. Using scan tool (M.U.T.-IIISE), check data list item 15: Throttle Position Sensor (sub).
cautionTo prevent damage to scan tool (M.U.T.-IIISE), always turn off the power supply mode of the electric motor switch before connecting or disconnecting scan tool (M.U.T.-IIISE).
(1) Connect scan tool (M.U.T.-IIISE). Refer to HOW TO CONNECT THE SCAN TOOL (M.U.T.-IIISE) .
(2) Detach the intake air hose at the throttle body.
(3) Disconnect the connector of the throttle body assembly.
(4) Use test harness special tool MB991658 to connect only terminals TPSE, TPSM, TPS5, and TPSS line.
(5) Operate the electric motor switch without depressing the brake pedal and turn ON (not READY) the power supply mode of electric motor switch.
(6) Set scan tool (M.U.T.-IIISE) to the data reading mode for item 15, Throttle Position Sensor (sub).
  • Output voltage should be between 4,300 and 4,700 millivolts when the throttle valve is fully closed with your finger.
  • Output voltage should be between 200 and 600 millivolts when the throttle valve is fully open with your finger.
(7) Turn off the power supply mode of the electric motor switch.
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.
 
STEP 2. Measure the sensor supply voltage at throttle body assembly harness side connector.
(1) Disconnect the throttle body assembly connector and measure at the harness side.
(2) Turn on the power supply mode of the electric motor switch.
(3) Measure the voltage between terminal TPS5 and ground.
  • Voltage should be between 4.9 and 5.1 volts.
(4) Turn off the power supply mode of the electric motor switch.
Is the measured voltage between 4.9 and 5.1 volts?
Go to Step 5.
Go to Step 3.
 
STEP 3. Check of short to ground and open circuit in TPS5 line between electronic-controlled throttle valve connector and ECM connector.
Is the harness wire in good condition?
Go to Step 4.
Repair the connector(s) or wiring harness. Then go to Step 8.
 
STEP 4. Using scan tool (M.U.T.-IIISE), check data list item 15: Throttle Position Sensor (sub).
(1) Detach the intake air hose at the throttle body.
(2) Disconnect the connector of the throttle body assembly.
(3) Use test harness special tool MB991658 to connect only terminals TPSE, TPSM, TPS5, and TPSS line.
(4) Operate the electric motor switch without depressing the brake pedal and turn ON (not READY) the power supply mode of electric motor switch.
(5) Set scan tool (M.U.T.-IIISE) to the data reading mode for item 15, Throttle Position Sensor (sub).
  • Output voltage should be between 4,300 and 4,700 millivolts when the throttle valve is fully closed with your finger.
  • Output voltage should be between 200 and 600 millivolts when the throttle valve is fully open with your finger.
(6) Turn off the power supply mode of the electric motor switch.
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 .
Replace the ECM (Refer to Removal and Installation ). Then go to Step 8.
 
STEP 5. Check of harness damage in TPS5 line between electronic-controlled throttle valve connector and ECM connector.
Is the harness wire in good condition?
Go to Step 6.
Repair the connector(s) or wiring harness. Then go to Step 8.
 
STEP 6. Check of short to ground, open circuit and harness damage in TPSS line between electronic-controlled throttle valve connector and ECM connector.
Is the harness wire in good condition?
Go to Step 7.
Repair the connector(s) or wiring harness. Then go to Step 8.
 
STEP 7. Replace the throttle body assembly.
(1) Replace the throttle body assembly.
(2) Carry out a test drive with the drive cycle pattern. Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 1 .
(3) Check the diagnostic trouble code (DTC).
Is DTC P0222 set?
Replace the ECM (Refer to Removal and Installation ). Then go to Step 8.
The inspection is complete.
 
STEP 8. Test the OBD-II drive cycle.
(1) Carry out test drive with the drive cycle pattern. Refer to Diagnostic Function - OBD-II Drive Cycle - Pattern 1 .
(2) Check the diagnostic trouble code (DTC).
Is DTC P0222 set?
Retry the troubleshooting.
The inspection is complete.