DTC 27: Transmission Range Switch System (Open Circuit): Diagnosis

Required Special Tool: 

• MB991502: Scan Tool (MUT-II)

1. STEP 1. Using scan tool MB991502, check data list item 61: Transmission Range 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.
   1. Connect scan tool MB991502 to the data link connector.
      Fig 1: Connecting Scan Tool MB991502 To Data Link Connector

      Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
   2. Turn the ignition switch to the "ON" position.
   3. Set scan tool MB991502 to data reading mode for item 61, Transmission Range Switch.
      • Move the selector lever to "P," "R," "N," "D" and sport mode positions and confirm that the selected transmission ranges match the positions shown on scan tool MB991502. (Sport mode is indicated as "D" on scan tool MB991502.)
   4. Turn the ignition switch to the "LOCK" (OFF) position.

   Q: Is the switch operating properly? 

   1. YES:  It can be assumed that this malfunction is intermittent. Refer to HOW TO USE TROUBLESHOOTING/INSPECTION SERVICE POINTS - How to Cope with Intermittent Malfunction.
   2. NO:  When the transmission range does not match any of the positions shown on scan tool MB991502: Go to Step 2. When the transmission range does not match the "P" position on scan tool MB991502: Go to Step  6 . When the transmission range does not match the "R" position on scan tool MB991502: Go to Step  14 . When the transmission range does not match the "N" position on scan tool MB991502: Go to Step  21 . When the transmission range does not match the "D" position on scan tool MB991502: Go to Step  28 . When the transmission range does not match the sport mode position on scan tool MB991502 (agrees at "D" position): Go to Step  36 .
2. STEP 2. Check the transmission range switch. 

   Measure the resistance between the terminals for each selector position as indicated in the illustration

   Fig 2: Transmission Range Switch Continuity Chart

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
   Fig 3: Identifying Transmission Range Switch Connector Terminals

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

   Q: Does the resistance measure less than 2 ohms for each selector position? 

   1. YES  : Go to Step 3.
   2. NO  : Replace the transmission range switch. Refer to TRANSMISSION .
3. STEP 3. Check transmission range switch connector C-04, joint connector D-01, junction block connector D-212 and intermediate connector E-11 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 
   Fig 4: Locating Transmission Range Switch Connector C-04

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
   Fig 5: Locating Joint Connector D-01

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
   Fig 6: Locating Junction Block Connector D-212

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
   Fig 7: Locating Intermediate Connector E-11

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

   Q: Are the connectors and terminals in good condition? 

   1. YES  : Go to Step 4.
   2. NO  : Repair or replace the damaged components. Refer to HARNESS CONNECTOR INSPECTION .
4. STEP 4. Check harness for open circuit or short circuit to ground between transmission range switch connector C-04 terminal 7 and junction block connector D-212 terminal 9. 
   Fig 8: Locating Transmission Range Switch Connector C-04

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
   Fig 9: Locating Junction Block Connector D-212

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

   Q: Is the harness wire in good condition? 

   1. YES  : Go to Step 5.
   2. NO  : Repair or replace the harness wire.
5. STEP 5. Using scan tool MB991502, check data list item 61: Transmission Range 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.
   1. Connect scan tool MB991502 to the data link connector.
      Fig 10: Connecting Scan Tool MB991502 To Data Link Connector

      Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
   2. Turn the ignition switch to the "ON" position.
   3. Set scan tool MB991502 to data reading mode for item 61, Transmission Range Switch.
      • Move the selector lever to "P," "R," "N," "D" and sport mode positions and confirm that the selected transmission ranges match the positions shown on scan tool MB991502. (Sport mode is indicated as "D" on scan tool MB991502.)
   4. Turn the ignition switch to the "LOCK" (OFF) position.

   Q: Is the switch operating properly? 

   1. YES  : It can be assumed that this malfunction is intermittent. Refer to HOW TO USE TROUBLESHOOTING/INSPECTION SERVICE POINTS - How to Cope with Intermittent Malfunction.
   2. NO  : Replace the PCM.
6. STEP 6. Check the transmission range switch. 

   Measure the resistance between the terminals for each selector position as indicated in the illustration.

   Fig 11: Transmission Range Switch Continuity Chart

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
   Fig 12: Identifying Transmission Range Switch Connector Terminals

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

   Q: Does the resistance measure less than 2 ohms for each selector position? 

   1. YES  : Go to Step 7.
   2. NO  : Replace the transmission range switch. Refer to TRANSMISSION .
7. STEP 7. Check transmission range switch connector C-04 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 
   Fig 13: Locating Transmission Range Switch Connector C-04

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

   Q: Are the connector and terminals in good condition? 

   1. YES  : Go to Step 8.
   2. NO  : Repair or replace the damaged components. Refer to HARNESS CONNECTOR INSPECTION .
8. STEP 8. Measure the transmission range switch output voltage at PCM connector D-134 by backprobing. 
   1. Do not disconnect connector D-134.
      Fig 14: Locating PCM Connector D-134

      Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
   2. Turn the ignition switch to the "ON" position.
   3. Move the selector lever to the "P" position.
   4. Measure the voltage between terminal 66 and ground by backprobing.
      • The voltage should measure battery positive voltage.
      Fig 15: Measuring Voltage Between Terminal 66 And Ground

      Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
   5. Turn the ignition switch to the "LOCK" (OFF) position.

   Q: Does the voltage measure battery positive voltage? 

   1. YES  : Go to Step  13 .
   2. NO  : Go to Step 9.
9. STEP 9. Check PCM connector D-134 and intermediate connector E-114 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 
   Fig 16: Locating PCM Connector D-134

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
   Fig 17: Locating Intermediate Connector E-114

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

   Q: Are the connectors and terminals in good condition? 

   1. YES  : Go to Step 10.
   2. NO  : Repair or replace the damaged components. Refer to HARNESS CONNECTOR INSPECTION .
10. STEP 10. Check harness for open circuit or short circuit to ground between transmission range switch connector C-04 terminal 1 and PCM connector D-134 terminal 66. 
    Fig 18: Locating Transmission Range Switch Connector C-04

    Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    Fig 19: Locating PCM Connector D-134

    Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

    Q: Is the harness wire in good condition? 

    1. YES  : Go to Step 11.
    2. NO  : Repair or replace the harness wire.
11. STEP 11. Check combination meter connector D-32 and intermediate connector E-113 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 
    Fig 20: Locating Combination Meter Connector D-32

    Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    Fig 21: Locating Intermediate Connector E-113

    Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

    Q: Are the connectors and terminals in good condition? 

    1. YES  : Go to Step 12.
    2. NO  : Repair or replace the damaged components. Refer to HARNESS CONNECTOR INSPECTION .
12. STEP 12. Check harness for short circuit to ground between combination meter connector D-32 terminal 1 and intermediate connector E-114 terminal 22. 
    Fig 22: Locating Combination Meter Connector D-32

    Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    Fig 23: Locating Intermediate Connector E-114

    Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

    Q: Is the harness wire in good condition? 

    1. YES  : Go to Step  5 .
    2. NO  : Repair or replace the harness wire.
13. STEP 13. Check PCM connector D-134 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 
    Fig 24: Locating PCM Connector D-134

    Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

    Q: Are the connector and terminals in good condition? 

    1. YES  : Go to Step  5 .
    2. NO  : Repair or replace the damaged components. Refer to HARNESS CONNECTOR INSPECTION .
14. STEP 14. Check the transmission range switch. 

    Measure the resistance between the terminals for each selector position as indicated in the illustration.

    Fig 25: Transmission Range Switch Continuity Chart

    Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    Fig 26: Locating Transmission Range Switch

    Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

    Q: Does the resistance measure less than 2 ohms for each selector position? 

    1. YES  : Go to Step 15.
    2. NO  : Replace the transmission range switch. Refer to TRANSMISSION .
15. STEP 15. Check transmission range switch connector C-04 the for loose, corroded or damaged terminals, or terminals pushed back in the connector. 
    Fig 27: Locating Transmission Range Switch Connector C-04

    Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

    Q: Are the connector and terminals in good condition? 

    1. YES  : Go to Step 16.
    2. NO  : Repair or replace the damaged components. Refer to HARNESS CONNECTOR INSPECTION .
16. STEP 16. Measure the transmission range switch output voltage at PCM connector D-134 by backprobing. 
    1. Do not disconnect connector D-134.
       Fig 28: Locating PCM Connector D-134

       Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    2. Turn the ignition switch to the "ON" position.
    3. Move the selector lever to the "R" position.
    4. Measure the voltage between terminal 67 and ground by backprobing.
       • The voltage should measure battery positive voltage.
       Fig 29: Measuring Voltage Between Terminal 67 And Ground

       Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    5. Turn the ignition switch to the "LOCK" (OFF) position.

    Q: Does the voltage measure battery positive voltage? 

    1. YES  : Go to Step  13 .
    2. NO  : Go to Step 17.
17. STEP 17. Check joint connector D-116, PCM connector D-134 and intermediate connector E-114 for loose, corroded or damaged terminals, or terminals pushed back in the connector 
    Fig 30: Locating Joint Connector D-116

    Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    Fig 31: Locating PCM Connector D-134

    Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    Fig 32: Locating Intermediate Connector E-114

    Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

    Q: Are the connectors and terminals in good condition? 

    1. YES  : Go to Step 18.
    2. NO  : Repair or replace the damaged components. Refer to HARNESS CONNECTOR INSPECTION .
18. STEP 18. Check harness for open circuit or short circuit to ground between transmission range switch connector C-04 terminal 8 and PCM connector D-134 terminal 67. 
    Fig 33: Locating Transmission Range Switch Connector C-04

    Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    Fig 34: Locating PCM Connector D-134

    Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

    Q: Is the harness wire in good condition? 

    1. YES  : Go to Step 19.
    2. NO  : Repair or replace the harness wire.
19. STEP 19. Check joint connector D-29, combination meter connector D-32 and intermediate connector E-111 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 
    Fig 35: Locating Joint Connector D-29, Combination Meter Connector D-32

    Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    Fig 36: Locating Intermediate Connector E-111

    Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

    Q: Are the connectors and terminals in good condition? 

    1. YES  : Go to Step 20.
    2. NO  : Repair or replace the damaged components. Refer to HARNESS CONNECTOR INSPECTION .
20. STEP 20. Check harness for short circuit to ground between combination meter connector D-32 terminal 2 and joint connector D-116 terminal 33. 
    Fig 37: Locating Combination Meter Connector D-32

    Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    Fig 38: Locating Joint Connector D-116

    Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

    Q: Is the harness wire in good condition? 

    1. YES  : Go to Step  5 .
    2. NO  : Repair or replace the harness wire.
21. STEP 21. Check the transmission range switch. 

    Measure the resistance between the terminals for each selector position as indicated in the illustration.

    Fig 39: Transmission Range Switch Continuity Chart

    Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    Fig 40: Locating Transmission Range Switch

    Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

    Q: Does the resistance measure less than 2 ohms for each selector position? 

    1. YES  : Go to Step 22.
    2. NO  : Replace the transmission range switch. Refer to TRANSMISSION .
22. STEP 22. Check transmission range switch connector C-04 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 
    Fig 41: Locating Transmission Range Switch Connector C-04

    Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

    Q: Are the connector and terminals in good condition? 

    1. YES  : Go to Step 23.
    2. NO  : Repair or replace the damaged components. Refer to HARNESS CONNECTOR INSPECTION .
23. STEP 23. Measure the transmission range switch output voltage at PCM connector D-134 by backprobing. 
    1. Do not disconnect connector D-134.
       Fig 42: Locating PCM Connector D-134

       Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    2. Turn the ignition switch to the "ON" position.
    3. Move the selector lever to the "N" position.
    4. Measure the voltage between terminal 75 and ground by backprobing.
       • The voltage should measure battery positive voltage.
       Fig 43: Measuring Voltage Between Terminal 75 And Ground By Backprobing

       Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    5. Turn the ignition switch to the "LOCK" (OFF) position.

    Q: Does the voltage measure battery positive voltage? 

    1. YES  : Go to Step  13 .
    2. NO  : Go to Step 24.
24. STEP 24. Check PCM connector D-134 and intermediate connector E-114 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 
    Fig 44: Locating PCM Connector D-134

    Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    Fig 45: Locating Intermediate Connector E-114

    Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

    Q: Are the connectors and terminals in good condition? 

    1. YES  : Go to Step 25.
    2. NO  : Repair or replace the damaged components. Refer to HARNESS CONNECTOR INSPECTION .
25. STEP 25. Check harness for open circuit or short circuit to ground between transmission range switch connector C-04 terminal 2 and PCM connector D-134 terminal 75. 
    Fig 46: Locating Transmission Range Switch Connector C-04

    Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    Fig 47: Locating PCM Connector D-134

    Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

    Q: Is the harness wire in good condition? 

    1. YES  : Go to Step 26.
    2. NO  : Repair or replace the harness wire.
26. STEP 26. Check combination meter connector D-32 and intermediate connector E-113 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 
    Fig 48: Locating Combination Meter Connector D-32

    Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    Fig 49: Locating Intermediate Connector E-113

    Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

    Q: Are the connectors and terminals in good condition? 

    1. YES  : Go to Step 27.
    2. NO  : Repair or replace the damaged components. Refer to HARNESS CONNECTOR INSPECTION .
27. STEP 27. Check harness for short circuit to ground between combination meter connector D-32 terminal 3 and intermediate connector E-114 terminal 23. 
    Fig 50: Locating Combination Meter Connector D-32

    Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    Fig 51: Locating Intermediate Connector E-114

    Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

    Q: Is the harness wire in good condition? 

    1. YES  : Go to Step  5 .
    2. NO  : Repair or replace the harness wire.
28. STEP 28. Check the transmission range switch. 

    Measure the resistance between the terminals for each selector position as indicated in the illustration.

    Fig 52: Transmission Range Switch Continuity Chart

    Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    Fig 53: Locating Transmission Range Switch

    Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

    Q: Does the resistance measure less than 2 ohms for each selector position? 

    1. YES  : Go to Step 29.
    2. NO  : Replace the transmission range switch. Refer to TRANSMISSION .
29. STEP 29. Check transmission range switch connector C-04 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 
    Fig 54: Locating Transmission Range Switch Connector C-04

    Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

    Q: Is the connector in good condition? 

    1. YES  : Go to Step 30.
    2. NO  : Repair or replace the damaged components. Refer to HARNESS CONNECTOR INSPECTION .
30. STEP 30. Measure the transmission range switch output voltage at PCM connector D-134 by backprobing. 
    1. Do not disconnect connector D-134.
       Fig 55: Locating PCM Connector D-134

       Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    2. Turn the ignition switch to the "ON" position.
    3. Move the selector lever to the "D" position.
    4. Measure the voltage between terminal 76 and ground by backprobing.
       • The voltage should measure battery positive voltage.
       Fig 56: Measuring Voltage Between Terminal 76 And Ground By Backprobing

       Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    5. Turn the ignition switch to the "LOCK" (OFF) position.

    Q: Does the voltage measure battery positive voltage? 

    1. YES  : Go to Step  13 .
    2. NO  : Go to Step 31.
31. STEP 31. Check PCM connector D-134 and intermediate connector E-114 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 
    Fig 57: Locating PCM Connector D-134

    Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    Fig 58: Locating Intermediate Connector E-114

    Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

    Q: Are the connectors and terminals in good condition? 

    1. YES  : Go to Step 32.
    2. NO  : Repair or replace the damaged components. Refer to HARNESS CONNECTOR INSPECTION .
32. STEP 32. Check harness for open circuit or short circuit to ground between transmission range switch connector C-04 terminal 3 and PCM connector D-134 terminal 76. 
    Fig 59: Locating Transmission Range Switch Connector C-04

    Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    Fig 60: Locating PCM Connector D-134

    Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

    Q: Is the harness wire in good condition? 

    1. YES  : Go to Step 33.
    2. NO  : Repair or replace the harness wire.
33. STEP 33. Check combination meter connector D-32, intermediate connector E-113, E-114 and shift switch assembly connector E-115 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 
    Fig 61: Locating Combination Meter Connector D-32

    Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    Fig 62: Locating Intermediate Connector E-113, E-114 And Shift Switch Assembly Connector E-115

    Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

    Q: Are the connectors and terminals in good condition? 

    1. YES  : Go to Step 34.
    2. NO  : Repair or replace the damaged components. Refer to HARNESS CONNECTOR INSPECTION .
34. STEP 34. Check harness for short circuit to ground between transmission range switch connector C-04 terminal 3 and shift switch assembly connector E-115 terminal 1. 
    Fig 63: Locating Transmission Range Switch Connector C-04

    Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    Fig 64: Locating Shift Switch Assembly Connector E-115

    Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

    Q: Is the harness wire in good condition? 

    1. YES  : Go to Step 35.
    2. NO  : Repair or replace the harness wire.
35. STEP 35. Check the harness for short circuit to ground between combination meter connector D-32 terminal 4 and shift switch assembly connector E-115 terminal 5. 
    Fig 65: Locating Combination Meter Connector D-32

    Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    Fig 66: Locating Shift Switch Assembly Connector E-115

    Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

    Q: Is the harness wire in good condition? 

    1. YES  : Go to Step  5 .
    2. NO  : Repair or replace the harness wire.
36. STEP 36. Check PCM connector D-134, intermediate connector E-114 and shift switch assembly connector E-115 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 
    Fig 67: Locating PCM Connector D-134

    Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    Fig 68: Locating Intermediate Connector E-114 And Shift Switch Assembly Connector E-115

    Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

    Q: Is the connector in good condition? 

    1. YES  : Go to Step 37.
    2. NO  : Repair or replace the damaged components. Refer to HARNESS CONNECTOR INSPECTION .
37. STEP 37. Check the harness for short circuit to ground between PCM connector D-134 terminal 85 and shift switch assembly connector E-115 terminal 4. 
    Fig 69: Locating PCM Connector D-134

    Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    Fig 70: Locating Shift Switch Assembly Connector E-115

    Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

    Q: Is the harness wire in good condition? 

    1. YES  : Go to Step  5 .
    2. NO  : Repair or replace the harness wire.