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Home >> Mitsubishi >> 2003 >> Eclipse V6-3.0L SOHC >> Repair and Diagnosis >> A L L Diagnostic Trouble Codes ( DTC ) >> Testing and Inspection >> Manufacturer Code Charts >> Transmission Control System >> DTC 14

DTC 14






DTC 14: Throttle Position Sensor System (Maladjusted Sensor)

CIRCUIT OPERATION
^ When the throttle valve shaft rotates from the idle position to the fully opened position, the resistance between the TPS output terminal (terminal 3) and ground terminal (terminal 1) will increase according to the rotation.
^ With the ignition switch in the "ON" position, voltage at pin 78 increases from around 0.7 volts at closed throttle to about 5 volts at wide open throttle.

DTC SET CONDITIONS
If TPS output voltage is 0.2 volts or lower or if it is 1.2 volts or higher when the engine is idling, the TPS adjustment is judged to be incorrect and diagnostic trouble code number "14" is output.

TROUBLESHOOTING HINTS (The most likely causes for this code to be set:)
^ Malfunction of the throttle position sensor circuit
^ Damaged harness, connector
^ Malfunction of the PCM

DIAGNOSIS

Required Special Tool:
^ MB991502: Scan Tool (MUT-II)

STEP 1. Using scan tool MB991502, check the A/T diagnostic trouble code.

CAUTION: To prevent damage to scan tool MB991502, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991502.





1) Connect scan tool MB991502 to the data link connector.
2) Turn the ignition switch to the "ON" position.
3) Read the A/T diagnostic trouble code.
4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the A/T diagnostic trouble code number "11" or "12" output?
YES: Refer to code number 11: Throttle Position Sensor System (Short Circuit) or code number 12: Throttle Position Sensor System (Open Circuit).
NO: Go to Step 2.

STEP 2. Using scan tool MB991502, check data list item 11: Throttle Position Sensor.





1) Connect scan tool MB991502 to the data link connector.
2) Turn the ignition switch to the "ON" position.
3) Set scan tool MB991502 to data reading mode for item 11: Throttle Position Sensor.
^ With the throttle valve in idle position, voltage should be between 535 and 735 mV.
^ With the throttle valve in full-open position, voltage should be between 4,500 and 5,500 mV.
4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the sensor operating properly?
YES: This malfunction is intermittent.
NO: Go to Step 3.

STEP 3. Check the sensor output voltage at throttle position sensor connector B-07 by backprobing.





1) Do not disconnect connector B-07.
2) Turn the ignition switch to the "ON" position.





3) Measure the voltage between terminal 3 and ground by backprobing.
^ With the throttle valve in idle position, voltage should be between 0.535 and 0.735 volts.
^ With the throttle valve in full-open position, voltage should be between 4.5 and 5.5 volts.
4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the voltage normal?
YES: Go to Step 4.
NO: Go to Step 8.

STEP 4. Check the sensor output voltage at PCM connector C-57 <2.4L Engine> or C-59 <3.0L Engine> by backprobing.





1) Do not disconnect connector C-57 <2.4L Engine> or C-59 <3.0L Engine>.
2) Turn the ignition switch to the "ON" position.





3) Measure the voltage between terminal 78 and ground by backprobing.
^ With the throttle valve in idle position, voltage should be between 0.535 and 0.735 volts.
^ With the throttle valve in full-open position, voltage should be between 4.5 and 5.5 volts.
4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the voltage normal?
YES: Go to Step 5.
NO: Go to Step7.

STEP 5. Check connectors B-07 at throttle position sensor and C-57 <2.4L Engine> or C-59 <3.0L Engine> at PCM for damage.








Q: Are the connectors in good condition?
YES: Go to Step 6.
NO: Repair or replace the defective connector(s).

STEP 6. Using scan tool MB991502, check data list item 11: Throttle Position Sensor.

CAUTION: To prevent damage to scan tool MB991502, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991502.





1) Connect scan tool MB991502 to the data link connector.
2) Turn the ignition switch to the "ON" position.
3) Set scan tool MB991502 to data reading mode for item 11: Throttle Position Sensor.
^ With the throttle valve in idle position, voltage should be between 535 and 735 mV.
^ With the throttle valve in the full-open position, voltage should be between 4,500 and 5,500 mV.
4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the sensor operating properly?
YES: This malfunction is intermittent.
NO: Replace the PCM.

STEP 7. Check connectors B-07 at throttle position sensor and C-57 <2.4L Engine> or C-59 <3.0L Engine> at PCM for damage.








Q: Are the connectors in good condition?
YES: Repair harness open circuit or damage between throttle position sensor connector B-07 terminal 3 and PCM connector C-57 <2.4L Engine> or C-59 <3.0L Engine> terminal 78.
NO: Repair or replace the defective connector(s).

STEP 8. Check the power supply voltage at throttle position sensor connector B-07 by backprobing.





1) Do not disconnect connector B-07.
2) Turn the ignition switch to the "ON" position.





3) Measure the voltage between terminal 4 and ground by backprobing.
^ Voltage should be between 4.9 and 5.1 volts.
4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the voltage normal?
YES: Go to Step 13.
NO: Go to Step 9.

STEP 9. Check the power supply voltage at PCM connector C-54 <2.4L Engine> or C-55 <3.0L Engine> by backprobing.





1) Do not disconnect connector C-54 <2.4L Engine> or C-55 <3.0L Engine>.
2) Turn the ignition switch to the "ON" position.





3) Measure the voltage between terminal 46 and ground by backprobing.
^ Voltage should be between 4.9 and 5.1 volts.
4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the voltage normal?
YES: Go to Step 10.
NO: Go to Step 11.

STEP 10. Check connectors B-07 at throttle position sensor and C-54 <2.4L Engine> or C-55 <3.0L Engine> at PCM for damage.








Q: Are the connectors in good condition?
YES: Repair harness open circuit or damage between throttle position sensor connector B-07 terminal 4 and PCM connector C-54 <2.4L Engine> or C-55 <3.0L Engine> terminal 46.
NO: Repair or replace the defective connector(s).

STEP 11. Check connectors B-07 at throttle position sensor and C-54 <2.4L Engine> or C-55 <3.0L Engine> at PCM for damage.








Q: Are the connectors in good condition?
YES: Go to Step 12.
NO: Repair or replace the defective connector(s).

STEP 12. Check harness for short circuit to ground between throttle position sensor connector B-07 terminal 4 and PCM connector C-54 <2.4L Engine> or C-55 <3.0L Engine> terminal 46.








Q: Is the harness wire in good condition?
YES: Go to Step 6.
NO: Repair it.

STEP 13. Check the ground voltage at throttle position sensor connector B-07 by backprobing.





1) Do not disconnect connector B-07.
2) Turn the ignition switch to the "ON" position.





3) Measure the voltage between terminal 1 and ground by backprobing.
^ Voltage should be 0.5 volt or less.
4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the voltage normal?
YES: Go to Step 17.
NO: Go to Step 14.

STEP 14. Check the ground voltage at PCM connector C-54 <2.4L Engine> or C-55 <3.0L Engine> by backprobing.





1) Do not disconnect connector C-54 <2.4L Engine> or C-55 <3.0L Engine>.
2) Turn the ignition switch to the "ON" position.





3) Measure the voltage between terminal 57 and ground by backprobing.
^ Voltage should be 0.5 volt or less.
4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the voltage normal?
YES: Go to Step 15.
NO: Go to Step 16.

STEP 15. Check connectors B-07 at throttle position sensor and C-54 <2.4L Engine> or C-55 <3.0L Engine> at PCM for damage.








Q: Are the connectors in good condition?
YES: Repair harness open circuit or damage between throttle position sensor connector B-07 terminal 1 and PCM connector C-54 <2.4L Engine> or C-55 <3.0L Engine> terminal 57.
NO: Repair or replace the defective connector(s).

STEP 16. Check connector C-54 <2.4L Engine> or C-55 <3.0L Engine> at PCM for damage.





Q: Is the connector in good condition?
YES: Go to Step 6.
NO: Repair or replace it.

STEP 17. Check connector B-07 at throttle position sensor for damage.





Q: Is the connector in good condition?
YES: Go to Step 1 8.
NO: Repair or replace it.

STEP 18. Check the throttle position sensor.





1) Disconnect connector B-07 and measure at the sensor side.





2) Measure the resistance between terminal 1 and 4.
Standard value: 3.5 - 6.5 k Ohms





3) Measure resistance between the throttle position sensor side connector terminal 1 and 3.
4) Move the throttle valve from idle position to full-open position.
^ Resistance should change smoothly in proportion to opening angle of the throttle valve.
Q: Is the resistance normal?
YES: Go to Step 19.
NO: Replace the throttle position sensor.

STEP 19. Check connectors C-54 <2.4L Engine> or C-55 <3.0L Engine> and C-57 <2.4L Engine> or C-59 <3.0L Engine> at PCM for damage.





Q: Are the connectors in good condition?
YES: Go to Step 20.
NO: Repair or replace the defective connector(s).

STEP 20. Check harness for short circuit to ground or damage between throttle position sensor connector B-07 terminal 3 and PCM connector C-57 <2.4L Engine> or C-59 <3.0L Engine> terminal 78.








Q: Is the harness wire in good condition?
YES: Go to Step 21.
NO: Repair it.

STEP 21. Check the connector and the harness for short circuit to ground between the throttle position sensor connector and the auto-cruise control-ECU connector.
Q: Is the harness wire in good condition?
YES: Throttle position sensor adjustment.
NO: Repair it.

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