LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Mitsubishi >> 2003 >> Montero Limited >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0222: Throttle Position Sensor (Sub) Circuit Low Input >> Diagnostic Procedure
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Diagnostic Procedure

CAUTION: To prevent damage to scan tool (MB991502), always turn the ignition off before connecting or disconnecting it.
  1. Connect scan tool (MB991502) to the data link connector. Turn the ignition on. Detach the intake air hose at the throttle body. Disconnect the connector of the throttle position sensor. Use test harness special tool (MB991348) to connect only terminals No. 1, No. 2, No. 3, and No. 4. Set the scan tool to data reading mode for item 14: THROTTLE POSITION SENSOR (SUB). Output voltage should be between 2.2-2.8 volts when the throttle valve is fully closed with your finger. Output voltage should be between 3.8-4.9 volts when the throttle valve is fully open with your finger. Turn the ignition off. If the sensor is operating properly, it can be assumed that this malfunction is intermittent. Refer to INTERMITTENT DIAGNOSTIC TROUBLE CODES . If the sensor is malfunctioning, go to the next step.
  2. Check connector B-05 at throttle position sensor for damage. If the connector is in good condition, go to the next step, otherwise, repair or replace it and proceed to step  12.
  3. Measure the sensor supply voltage at throttle position sensor harness side connector B-05. Disconnect the connector B-05 and measure at the harness side. Turn the ignition on. Measure the voltage between terminal No. 2 and ground. Voltage should be between 4.8-5.2 volts. Turn the ignition off. If the voltage is normal, proceed to step  7, otherwise, go to the next step.
  4. Check connector D-135 at PCM for damage. If the connector is in good condition, go to the next step, otherwise, repair or replace it and proceed to step  12.
  5. Check for open circuit and short circuit to ground between throttle position sensor connector B-05 (terminal No. 2) and PCM connector D-135 (terminal No. 106). If the harness wire is in good condition, go to the next step, otherwise, repair it and proceed to step  12.
  6. Connect scan tool (MB991502) to the data link connector. Turn the ignition on. Detach the intake air hose at the throttle body. Disconnect the connector of the throttle position sensor. Use test harness special tool (MB991348) to connect only terminals No. 1, No. 2, No. 3 and No. 4. Set the scan tool to data reading mode for item 14: THROTTLE POSITION SENSOR (SUB). Output voltage should be between 2.2-2.8 volts when the throttle valve is fully closed with your finger. Output voltage should be between 3.8-4.9 volts when the throttle valve is fully open with your finger. Turn the ignition off. If the sensor is operating properly, it can be assumed that this malfunction is intermittent. Refer to INTERMITTENT DIAGNOSTIC TROUBLE CODES . If the sensor is malfunctioning, replace the PCM and proceed to step  12.
  7. Check the throttle position sensor. Disconnect the connector B-05. Measure the resistance between throttle position sensor side connector terminals No. 2 and No. 4. Standard value: 2-4 kiloohms. If the resistance is normal, go to the next step, otherwise, replace the throttle body assembly and proceed to step  12.
  8. Check connector D-135 at PCM for damage. If the connector is in good condition, go to the next step, otherwise, repair or replace it and proceed to step  12.
  9. Check for harness damage between throttle position sensor connector B-05 (terminal No. 2) and PCM connector D-135 terminal No. 106). If the harness wire is in good condition, go to the next step, otherwise, repair it and proceed to step  12.
  10. Check for open circuit, short circuit to ground and harness damage between throttle position sensor connector B-05 (terminal No. 3) and PCM connector D-135 (terminal No. 113). If the harness wire is in good condition, go to the next step, otherwise, repair it and proceed to step  12.
  11. Connect scan tool (MB991502) to the data link connector. Turn the ignition on. Detach the intake air hose at the throttle body. Disconnect the connector of the throttle position sensor. Use test harness special tool (MB991348) to connect only terminals No. 1, No. 2, No. 3 and No. 4. Set the scan tool to data reading mode for item 14: THROTTLE POSITION SENSOR (SUB). Output voltage should be between 2.2-2.8 volts when the throttle valve is fully closed with your finger. Output voltage should be between 3.8-4.9 volts when the throttle valve is fully opened with your finger. Turn the ignition off. If the sensor is operating properly, it can be assumed that this malfunction is intermittent. Refer to INTERMITTENT DIAGNOSTIC TROUBLE CODES . If the sensor is malfunctioning, replace the PCM and go to the next step.
  12. Connect scan tool (MB991502) to the data link connector. Turn the ignition on. After the DTC has been deleted, read the DTC again. Turn the ignition off. If DTC P0222 is set, retry the troubleshooting. If the DTC is absent, the inspection is complete.
scientia non olet · About LEMON Manuals