DTC 27: Park/Neutral Position Switch System (Open Circuit): Diagnosis
Required Special Tool:
- MB991502: Scan Tool (MUT-II)
- STEP 1. Using scan tool MB991502, check data list item 61: Park/Neutral Position Switch. 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.
- Connect scan tool MB991502 to the data link connector.
- Turn the ignition switch to "ON" position.
- Set scan tool MB991502 to data reading mode for item 61, Park/Neutral Position Switch.
- Move the selector lever to "P," "R," "N," "D," "3," "2," "L" positions and confirm that the selected selector lever positions match the positions shown on scan tool MB991502.
- Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the switch operating properly?
- YES: It can be assumed that this malfunction is intermittent.
- NO: When the selector lever position does not match any of the positions shown on scan tool MB991502: Go to Step 2. When the selector lever position does not match the "P" position on scan tool MB991502: Go to Step 6 . When the selector lever position does not match the "R" position on scan tool MB991502: Go to Step 12 . When the selector lever position does not match the "N" position on scan tool MB991502: Go to Step 17 . When the selector lever position does not match the "D" position on scan tool MB991502: Go to Step 22 . When the selector lever position does not match the "3" position on scan tool MB991502: Go to Step 27 . When the selector lever position does not match the "2" position on scan tool MB991502: Go to Step 32 . When the selector lever position does not match the "L" position on scan tool MB991502: Go to Step 37 .
- STEP 2. Check the Park/Neutral position switch.
Measure the resistance between the terminals for each selector position as indicated in the table.
Q: Does the resistance measure less than 2 ohms for each selector position?
- YES: Go to Step 3.
- NO: Replace the Park/Neutral position switch. Refer to TRANSAXLE .
- STEP 3. Check Park/Neutral position switch connector B-16, intermediate connector C-123 and junction block connector C-210 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Q: Are the connectors and terminals in good condition?
- YES: Go to Step 4.
- NO: Repair or replace the damaged components.
- STEP 4. Check harness for open or short circuit to ground between Park/Neutral position switch connector B-16 terminal 8 and junction block connector C-210 terminal 12.
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Q: Is the harness wire in good condition?
- YES: Go to Step 5.
- NO: Repair or replace the harness wire.
- STEP 5. Using scan tool MB991502, check data list item 61: Park/Neutral Position Switch. 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.
- Connect scan tool MB991502 to the data link connector.
- Turn the ignition switch to "ON" position.
- Set scan tool MB991502 to data reading mode for item 61, Park/Neutral Position Switch.
- Move the selector lever to "P," "R," "N," "D," "3," "2," "L" positions and confirm that the selected selector lever positions match the positions shown on scan tool MB991502.
- Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the switch operating properly?
- YES: It can be assumed that this malfunction is intermittent.
- NO: Replace the PCM.
- STEP 6. Check the Park/Neutral position switch.
Measure the resistance between the terminals for each selector position as indicated in the table.
Q: Does the resistance measure less than 2 ohms for each selector position?
- YES: Go to Step 7.
- NO: Replace the Park/Neutral position switch. Refer to TRANSAXLE .
- STEP 7. Check Park/Neutral position switch connector B-16 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Are the connector and terminals in good condition?
- YES: Go to Step 8.
- NO: Repair or replace the damaged components.
- STEP 8. Measure the Park/Neutral position switch output voltage at PCM connector C-114 by backprobing.
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
- Do not disconnect connector C-114.
- Turn the ignition switch to the "ON" position.
- Move the selector lever to the "P" position.
- Measure the voltage between terminal 101 and ground by backprobing.
- The voltage should measure battery positive voltage.
- Turn the ignition switch to the "LOCK" (OFF) position.
Q: Does the voltage measure battery positive voltage?
- YES: Go to Step 11 .
- NO: Go to Step 9.
- STEP 9. Check PCM connector C-114 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Are the connector and terminals in good condition?
- YES: Go to Step 10.
- NO: Repair or replace the damaged components.
- STEP 10. Check harness for open circuit or short circuit to ground between Park/Neutral position switch connector B-16 terminal 3 and PCM connector C-114 terminal 101.
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Q: Is the harness wire in good condition?
- YES: Go to Step 5 .
- NO: Repair or replace the harness wire.
- STEP 11. Check PCM connector C-114 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Are the connector and terminals in good condition?
- YES: Go to Step 5 .
- NO: Repair or replace the damaged components.
- STEP 12. Check the Park/Neutral position switch.
Measure the resistance between the terminals for each selector position as indicated in the table.
Q: Is the measured resistance less than 2 ohms for each selector position?
- YES: Go to Step 13.
- NO: Replace the Park/Neutral position switch. Refer to TRANSAXLE .
- STEP 13. Check Park/Neutral position switch connector B-16 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Are the connector and terminals in good condition?
- YES: Go to Step 14.
- NO: Repair or replace the damaged components. s
- STEP 14. Measure the Park/Neutral position switch output voltage at PCM connector C-114 by backprobing.
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
- Do not disconnect connector C-114.
- Turn the ignition switch to the "ON" position.
- Move the selector lever to the "R" position.
- Measure the voltage between terminal 108 and ground by backprobing.
- The voltage should measure battery positive voltage.
- Turn the ignition switch to the "LOCK" (OFF) position.
Q: Does the voltage measure battery positive voltage?
- YES: Go to Step 11 .
- NO: Go to Step 15.
- STEP 15. Check PCM connector C-114 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Are the connector and terminals in good condition?
- YES: Go to Step 16.
- NO: Repair or replace the damaged components.
- STEP 16. Check harness for open circuit or short circuit to ground between Park/Neutral position switch connector B-16 terminal 7 and PCM connector C-114 terminal 108.
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Q: Is the harness wire in good condition?
- YES: Go to Step 5 .
- NO: Repair or replace the harness wire.
- STEP 17. Check the Park/Neutral position switch.
Measure the resistance between the terminals for each selector position as indicated in the table.
Q: Is the measured resistance less than 2 ohms for each selector position?
- YES: Go to Step 18.
- NO: Replace the Park/Neutral position switch. Refer to TRANSAXLE .
- STEP 18. Check Park/Neutral position switch connector B-16 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Are the connector and terminals in good condition?
- YES: Go to Step 19.
- NO: Repair or replace the damaged components.
- STEP 19. Measure the Park/Neutral position switch output voltage at PCM connector C-114 by backprobing.
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
- Do not disconnect connector C-114.
- Turn the ignition switch to the "ON" position.
- Move the selector lever to the "N" position.
- Measure the voltage between terminal 121 and ground by backprobing.
- Turn the ignition switch to the "LOCK" (OFF) position.
Q: Does the voltage measure battery positive voltage?
- YES: Go to Step 11 .
- NO: Go to Step 20.
- STEP 20. Check PCM connector C-114 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Are the connector and terminals in good condition?
- YES: Go to Step 21.
- NO: Repair or replace the damaged components.
- STEP 21. Check harness for open circuit or short circuit to ground between Park/Neutral position switch connector B-16 terminal 4 and PCM connector C-114 terminal 121.
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Q: Is the harness wire in good condition?
- YES: Go to Step 5 .
- NO: Repair or replace the harness wire.
- STEP 22. Check the Park/Neutral position switch.
Measure the resistance between the terminals for each selector position as indicated in the table.
Q: Is the measured resistance less than 2 ohms for each selector position?
- YES: Go to Step 23.
- NO: Replace the Park/Neutral position switch. Refer to TRANSAXLE .
- STEP 23. Check Park/Neutral position switch connector B-16 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Are the connector and terminals in good condition?
- YES: Go to Step 24.
- NO: Repair or replace the damaged components.
- STEP 24. Measure the Park/Neutral position switch output voltage at PCM connector C-114 by backprobing.
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
- Do not disconnect connector C-114.
- Turn the ignition switch to the "ON" position.
- Move the selector lever to the "D" position.
- Measure the voltage between terminal 102 and ground by backprobing.
- The voltage should equal battery voltage (approximately 12 volts).
- Turn the ignition switch to the "LOCK" (OFF) position.
Q: Does the voltage measure battery positive voltage?
- YES: Go to Step 11 .
- NO: Go to Step 25.
- STEP 25. Check PCM connector C-114 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Are the connector and terminals in good condition?
- YES: Go to Step 26.
- NO: Repair or replace the damaged components.
- STEP 26. Check harness for open circuit or short circuit to ground between Park/Neutral position switch connector B-16 terminal 1 and PCM connector C-114 terminal 102.
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Q: Is the harness wire in good condition?
- YES: Go to Step 5 .
- NO: Repair or replace the harness wire.
- STEP 27. Check the Park/Neutral position switch.
Measure the resistance between the terminals for each selector position as indicated in the table.
Q: Is the measured resistance less than 2 ohms for each selector position?
- YES: Go to Step 28.
- NO: Replace the Park/Neutral position switch. Refer to TRANSAXLE .
- STEP 28. Check Park/Neutral position switch connector B-16 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Are the connector and terminals in good condition?
- YES: Go to Step 29.
- NO: Repair or replace the damaged components.
- STEP 29. Measure the Park/Neutral position switch output voltage at PCM connector C-114 by backprobing.
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
- Do not disconnect connector C-114.
- Turn the ignition switch to the "ON" position.
- Move the selector lever to the "3" position.
- Measure the voltage between terminal 109 and ground by backprobing.
- The voltage should measure battery positive voltage.
- Turn the ignition switch to the "LOCK" (OFF) position.
Q: Does the voltage measure battery positive voltage?
- YES: Go to Step 11 .
- NO: Go to Step 30.
- STEP 30. Check PCM connector C-114 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Are the connector and terminals in good condition?
- YES: Go to Step 31.
- NO: Repair or replace the damaged components.
- STEP 31. Check harness for open circuit or short circuit to ground between Park/Neutral position switch connector B-16 terminal 5 and PCM connector C-114 terminal 109.
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Q: Is the harness wire in good condition?
- YES: Go to Step 5 .
- NO: Repair or replace the harness wire.
- STEP 32. Check the Park/Neutral position switch.
Measure the resistance between the terminals for each selector position as indicated in the table.
Q: Is the measured resistance less than 2 ohms for each selector position?
- YES: Go to Step 33.
- NO: Replace the Park/Neutral position switch. Refer to TRANSAXLE .
- STEP 33. Check Park/Neutral position switch connector B-16 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Are the connector and terminals in good condition?
- YES: Go to Step 34.
- NO: Repair or replace the damaged components.
- STEP 34. Measure the Park/Neutral position switch output voltage at PCM connector C-114 by backprobing.
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
- Do not disconnect connector C-114.
- Turn the ignition switch to the "ON" position.
- Move the selector lever to the "2" position.
- Measure the voltage between terminal 122 and ground by backprobing.
- The voltage should measure battery positive voltage.
- Turn the ignition switch to the "LOCK" (OFF) position.
Q: Does the voltage measure battery positive voltage?
- YES: Go to Step 11 .
- NO: Go to Step 35.
- STEP 35. Check PCM connector C-114 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Are the connector and terminals in good condition?
- YES: Go to Step 36.
- NO: Repair or replace the damaged components.
- STEP 36. Check harness for open circuit or short circuit to ground between Park/Neutral position switch connector B-16 terminal 2 and PCM connector C-114 terminal 122.
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Q: Is the harness wire in good condition?
- YES: Go to Step 5 .
- NO: Repair or replace the harness wire.
- STEP 37. Check the Park/Neutral position switch.
Measure the resistance between the terminals for each selector position as indicated in the table.
Q: Is the measured resistance less than 2 ohms for each selector position?
- YES: Go to Step 38.
- NO: Replace the Park/Neutral position switch. Refer to TRANSAXLE .
- STEP 38. Check Park/Neutral position switch connector B-16 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Are the connector and terminals in good condition?
- YES: Go to Step 39.
- NO: Repair or replace the damaged components.
- STEP 39. Measure the Park/Neutral position switch output voltage at PCM connector C-114 by backprobing.
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
- Do not disconnect connector C-114.
- Turn the ignition switch to the "ON" position.
- Move the selector lever to the "L" position.
- Measure the voltage between terminal 110 and ground by backprobing.
- The voltage should measure battery positive voltage.
- Turn the ignition switch to the "LOCK" (OFF) position.
Q: Does the voltage measure battery positive voltage?
- YES: Go to Step 11 .
- NO: Go to Step 40.
- STEP 40. Check PCM connector C-114 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Are the connector and terminals in good condition?
- YES: Go to Step 41.
- NO: Repair or replace the damaged components.
- STEP 41. Check harness for open circuit or short circuit to ground between Park/Neutral position switch connector B-16 terminal 6 and PCM connector C-114 terminal 110.
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Q: Is the harness wire in good condition?
- YES: Go to Step 5 .
- NO: Repair or replace the harness wire.