DTC P1770 (P0705): Transmission Range Switch System (Open Circuit): Diagnosis

Required Special Tools: 

• MB991958: Scan Tool (M.U.T.-III Sub Assembly)
  • MB991824: V.C.I.
  • MB991827: M.U.T.-III USB Cable
  • MB991910: M.U.T.-III Main Harness A

1. STEP 1. Using scan tool MB991958, check data list item 34: Transmission Range Switch. 
   CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
   1. Connect scan tool MB991958 to the data link connector.
   2. Turn the ignition switch to "ON" position.
   3. Set scan tool MB991958 to the data reading mode.
      • Item 34: Transmission Range Switch.
        • Move the selector lever to "P," "R," "N," "D" and sport mode positions and confirm that the selected transmission range match the positions shown on scan tool MB991958. (The scan tool displays "D" range when the selector lever is shifted to the sport mode).
   4. Turn the ignition switch to the "LOCK" (OFF) position.
      Fig 1: Connecting Special Tool MB991910 To Data Link Connector

      Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

      Q: Does the scan tool indication correspond to the actual transmission range? 

      1. YES:  It can be assumed that this malfunction is intermittent. Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION .
      2. NO (no correct transmission range is displayed):  Go to Step 2.
      3. NO (Only "P" position is not displayed correctly):  Go to Step  6.
      4. NO (Only "R" position is not displayed correctly):  Go to Step  12.
      5. NO (Only "N" position is not displayed correctly):  Go to Step  17.
      6. NO (Only "D" position is not displayed correctly):  Go to Step  22.
      7. NO [Only sport mode position is not displayed correctly ("D" is not displayed.)]:  Go to Step  29.
2. STEP 2. Check the transmission range switch. 

   Measure the resistance between the terminals for each transmission range as indicated in the table below.

   RESISTANCE SPECIFICATION
   
   

   TRANSMISSION RANGE	TERMINAL CONNECTION OF TESTER	SPECIFIED CONDITION
   P	3 - 8, 9 - 10	Less than 2 ohms.
   R	7 - 8
   N	4 - 8, 9 - 10
   D	1 - 8

   Fig 2: Locating Transmission Range Switch

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
   NOTE: For vehicles with sport mode, four positions (P, R, N, D) are used.

   Q: Does the resistance measure less than 2 ohms for each transmission range? 

   1. YES:  Go to Step 3.
   2. NO:  Replace the transmission range switch. Refer to TRANSAXLE <4A/T> or Refer to TRANSAXLE <5A/T>.
      Fig 3: Transmission Range Switch Position

      Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
3. STEP 3. Check intermediate connector A-15, C-24, transmission range switch connector B-113, joint connector (1) C-28 and junction block connector C-203 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 
   Fig 4: Locating Intermediate Connector A-15

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
   Fig 5: Locating Intermediate Connector C-24

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
   Fig 6: Locating Transmission Range Switch Connector B-113

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
   Fig 7: Locating Joint Connector C-28

   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 .
      Fig 8: Locating Junction Block Connector C-203

      Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
4. STEP 4. Check harness for open or short circuit to ground between transmission range switch connector B-113 terminal 8 and junction block connector C-203 terminal 12. 

   Q: Is the harness wire in good condition? 

   1. YES:  Go to Step 5.
   2. NO:  Repair or replace the harness wire.
      Fig 9: Locating Transmission Range Switch Connector B-113

      Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
      Fig 10: Locating Junction Block Connector C-203

      Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
5. STEP 5. Using scan tool MB991958, check data list item 34: Transmission Range Switch. 
   CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
   1. Connect scan tool MB991958 to the data link connector.
   2. Turn the ignition switch to "ON" position.
   3. Set scan tool MB991958 to the data reading mode.
      • Item 34: Transmission Range Switch.
        • Move the selector lever to "P," "R," "N," "D" and sport mode positions and confirm that the selected transmission range match the positions shown on scan tool MB991958. (The scan tool displays "D" range when the selector lever is shifted to the sport mode).
   4. Turn the ignition switch to the "LOCK" (OFF) position.
      Fig 11: Connecting Special Tool MB991910 To Data Link Connector

      Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

      Q: Is the switch operating properly? 

      1. YES:  It can be assumed that this malfunction is intermittent. Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION .
      2. NO:  Replace the PCM. When the PCM is replaced, register the encrypted code. Refer to ENCRYPTED CODE REGISTRATION CRITERIA TABLE .
6. STEP 6. Check the transmission range switch. 

   Measure the resistance between the terminals for each transmission range as indicated in the table below.

   RESISTANCE SPECIFICATION
   
   

   TRANSMISSION RANGE	TERMINAL CONNECTION OF TESTER	SPECIFIED CONDITION
   P	3 - 8, 9 - 10	Less than 2 ohms.
   R	7 - 8
   N	4 - 8, 9 - 10
   D	1 - 8

   Fig 12: Locating Transmission Range Switch

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
   NOTE: For vehicles with sport mode, four positions (P, R, N, D) are used.

   Q: Does the resistance measure less than 2 ohms for each transmission range? 

   1. YES:  Go to Step 7.
   2. NO:  Replace the transmission range switch. Refer to TRANSAXLE <4A/T> or Refer to TRANSAXLE <5A/T>.
      Fig 13: Transmission Range Switch Position

      Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
7. STEP 7. Check transmission range switch connector B-113 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 

   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 .
      Fig 14: Locating Transmission Range Switch Connector B-113

      Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
8. STEP 8. Measure the transmission range switch output voltage at PCM connector B-20 by using check harness special tool MB991923. 
   1. Disconnect all the connectors from the PCM.
      Fig 15: Locating PCM Connector B-20

      Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
   2. Connect special tool MB991923 (check harness) between the PCM and the body-side harness connector.
   3. Turn the ignition switch to the "ON" position.
   4. Move the selector lever to the "P" position.
      Fig 16: Connecting Special Tool MB991923 (Check Harness) Between PCM And Body-Side Harness Connector

      Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
   5. Measure the voltage between terminal 67 and ground.
      • The voltage should measure battery positive voltage.
   6. Turn the ignition switch to the "LOCK" (OFF) position.

      Q: Is the measured voltage battery positive voltage? 

      1. YES:  Go to Step  11.
      2. NO:  Go to Step 9.
         Fig 17: Measuring Voltage Between Terminal 67 And Ground

         Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
9. STEP 9. Check PCM connector B-20 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 

   Q: Are the connector and terminals in good condition? 

   1. YES:  Go to Step 10.
   2. NO:  Repair or replace the damaged components. Refer to HARNESS CONNECTOR INSPECTION .
      Fig 18: Locating PCM Connector B-20

      Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
10. STEP 10. Check harness for open circuit or short circuit to ground between PCM connector B-20 terminal 67 and transmission range switch connector B-113 terminal 3. 

    Q: Is the harness wire in good condition? 

    1. YES:  Go to Step  5.
    2. NO:  Repair or replace the harness wire.
       Fig 19: Locating PCM Connector B-20

       Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
       Fig 20: Locating Transmission Range Switch Connector B-113

       Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
11. STEP 11. Check PCM connector B-20 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 

    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 .
       Fig 21: Locating PCM Connector B-20

       Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
12. STEP 12. Check the transmission range switch. 

    Measure the resistance between the terminals for each transmission range as indicated in the table below.

    RESISTANCE SPECIFICATION
    
    

    TRANSMISSION RANGE	TERMINAL CONNECTION OF TESTER	SPECIFIED CONDITION
    P	3 - 8, 9 - 10	Less than 2 ohms.
    R	7 - 8
    N	4 - 8, 9 - 10
    D	1 - 8

    Fig 22: Locating Transmission Range Switch

    Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    NOTE: For vehicles with sport mode, four positions (P, R, N, D) are used.

    Q: Is the measured resistance less than 2 ohms for each transmission range? 

    1. YES:  Go to Step 13.
    2. NO:  Replace the transmission range switch. Refer to TRANSAXLE <4A/T> or Refer to TRANSAXLE <5A/T>.
       Fig 23: Transmission Range Switch Position

       Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
13. STEP 13. Check transmission range switch connector B-113 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 

    Q: Are the connector and terminals in good condition? 

    1. YES:  Go to Step 14.
    2. NO:  Repair or replace the damaged components. Refer to HARNESS CONNECTOR INSPECTION .
       Fig 24: Locating Transmission Range Switch Connector B-113

       Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
14. STEP 14. Measure the transmission range switch output voltage at PCM connector B-20 by using check harness special tool MB991923. 
    1. Disconnect all the connectors from the PCM.
       Fig 25: Locating PCM Connector B-20

       Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    2. Connect special tool MB991923 (check harness) between the PCM and the body-side harness connector.
    3. Turn the ignition switch to the "ON" position.
    4. Move the selector lever to the "R" position.
       Fig 26: Connecting Special Tool MB991923 (Check Harness) Between PCM And Body-Side Harness Connector

       Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    5. Measure the voltage between terminal 61 and ground.
       • The voltage should measure below battery positive voltage.
    6. Turn the ignition switch to the "LOCK" (OFF) position.

       Q: Is the measured voltage battery positive voltage? 

       1. YES:  Go to Step  11.
       2. NO:  Go to Step 15.
          Fig 27: Measuring Voltage Between Terminal 61 And Ground

          Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
15. STEP 15. Check PCM connector B-20 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 

    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 .
       Fig 28: Locating PCM Connector B-20

       Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
16. STEP 16. Check harness for open circuit or short circuit to ground between PCM connector B-20 terminal 61 and transmission range switch connector B-113 terminal 7. 

    Q: Is the harness wire in good condition? 

    1. YES:  Go to Step  5.
    2. NO:  Repair or replace the harness wire.
       Fig 29: Locating PCM Connector B-20

       Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
       Fig 30: Locating Transmission Range Switch Connector B-113

       Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
17. STEP 17. Check the transmission range switch. 

    Measure the resistance between the terminals for each transmission range as indicated in the table below.

    RESISTANCE SPECIFICATION
    
    

    TRANSMISSION RANGE	TERMINAL CONNECTION OF TESTER	SPECIFIED CONDITION
    P	3 - 8, 9 - 10	Less than 2 ohms.
    R	7 - 8
    N	4 - 8, 9 - 10
    D	1 - 8

    Fig 31: Locating Transmission Range Switch

    Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    NOTE: For vehicles with sport mode, four positions (P, R, N, D) are used.

    Q: Is the measured resistance less than 2 ohms for each transmission range? 

    1. YES:  Go to Step 18.
    2. NO:  Replace the transmission range switch. Refer to TRANSAXLE <4A/T> or Refer to TRANSAXLE <5A/T>.
       Fig 32: Transmission Range Switch Position

       Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
18. STEP 18. Check transmission range switch connector B-113 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 

    Q: Are the connector and terminals in good condition? 

    1. YES:  Go to Step 19.
    2. NO:  Repair or replace the damaged components. Refer to HARNESS CONNECTOR INSPECTION .
       Fig 33: Locating Transmission Range Switch Connector B-113

       Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
19. STEP 19. Measure the transmission range switch output voltage at PCM connector B-20 by using check harness special tool MB991923. 
    1. Disconnect all the connectors from the PCM.
       Fig 34: Locating PCM Connector B-20

       Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    2. Connect special tool MB991923 (check harness) between the PCM and the body-side harness connector.
    3. Turn the ignition switch to the "ON" position.
    4. Move the selector lever to the "N" position.
       Fig 35: Connecting Special Tool MB991923 (Check Harness) Between PCM And Body-Side Harness Connector

       Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    5. Measure the voltage between terminal 77 and ground.
       • The voltage should measure battery positive voltage.
    6. Turn the ignition switch to the "LOCK" (OFF) position.

       Q: Is the measured voltage battery positive voltage? 

       1. YES:  Go to Step  11.
       2. NO:  Go to Step 20.
          Fig 36: Measuring Voltage Between Terminal 77 And Ground

          Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
20. STEP 20. Check PCM connector B-20 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 

    Q: Are the connector and terminals in good condition? 

    1. YES:  Go to Step 21.
    2. NO:  Repair or replace the damaged components. Refer to HARNESS CONNECTOR INSPECTION .
       Fig 37: Locating PCM Connector B-20

       Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
21. STEP 21. Check harness for open circuit or short circuit to ground between PCM connector B-20 terminal 77 and transmission range switch connector B-113 terminal 4. 

    Q: Is the harness wire in good condition? 

    1. YES:  Go to Step  5.
    2. NO:  Repair or replace the harness wire.
       Fig 38: Locating PCM Connector B-20

       Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
       Fig 39: Locating Transmission Range Switch Connector B-113

       Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
22. STEP 22. Check the transmission range switch. 

    Measure the resistance between the terminals for each transmission range as indicated in the table below.

    RESISTANCE SPECIFICATION
    
    

    TRANSMISSION RANGE	TERMINAL CONNECTION OF TESTER	SPECIFIED CONDITION
    P	3 - 8, 9 - 10	Less than 2 ohms.
    R	7 - 8
    N	4 - 8, 9 - 10
    D	1 - 8

    Fig 40: Locating Transmission Range Switch

    Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    NOTE: For vehicles with sport mode, four positions (P, R, N, D) are used.

    Q: Is the measured resistance less than 2 ohms for each transmission range? 

    1. YES:  Go to Step 23.
    2. NO:  Replace the transmission range switch. Refer to TRANSAXLE <4A/T> or Refer to TRANSAXLE <5A/T>.
       Fig 41: Transmission Range Switch Position

       Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
23. STEP 23. Check transmission range switch connector B-113 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 

    Q: Are the connector and terminals in good condition? 

    1. YES:  Go to Step 24.
    2. NO:  Repair or replace the damaged components. Refer to HARNESS CONNECTOR INSPECTION .
       Fig 42: Locating Transmission Range Switch Connector B-113

       Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
24. STEP 24. Measure the transmission range switch output voltage at PCM connector B-20 by using check harness special tool MB991923. 
    1. Disconnect all the connectors from the PCM.
       Fig 43: Locating PCM Connector B-20

       Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    2. Connect special tool MB991923 (check harness) between the PCM and the body-side harness connector.
    3. Turn the ignition switch to the "ON" position.
    4. Move the selector lever to the "D" position.
       Fig 44: Connecting Special Tool MB991923 (Check Harness) Between PCM And Body-Side Harness Connector

       Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
    5. Measure the voltage between terminal 73 and ground.
       • The voltage should equal battery voltage (approximately 12 volts).
    6. Turn the ignition switch to the "LOCK" (OFF) position.

       Q: Does the voltage measure battery positive voltage? 

       1. YES:  Go to Step  11.
       2. NO:  Go to Step 25.
          Fig 45: Measuring Voltage Between Terminal 73 And Ground

          Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
25. STEP 25. Check PCM connector B-20 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 

    Q: Are the connector and terminals in good condition? 

    1. YES:  Go to Step 26.
    2. NO:  Repair or replace the damaged components. Refer to HARNESS CONNECTOR INSPECTION .
       Fig 46: Locating PCM Connector B-20

       Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
26. STEP 26. Check harness for open circuit or short circuit to ground between PCM connector B-20 terminal 73 and transmission range switch connector B-113 terminal 1. 

    Q: Is the harness wire in good condition? 

    1. YES:  Go to Step 27.
    2. NO:  Repair or replace the harness wire.
       Fig 47: Locating PCM Connector B-20

       Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
       Fig 48: Locating Transmission Range Switch Connector B-113

       Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
27. STEP 27. Check intermediate connector A-15 and shift switch assembly connector C-17 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 

    Q: Are the connector and terminals in good condition? 

    1. YES:  Go to Step 28.
    2. NO:  Repair or replace the damaged components. Refer to HARNESS CONNECTOR INSPECTION .
       Fig 49: Locating Intermediate Connector A-15

       Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
       Fig 50: Locating Shift Switch Assembly Connector C-17

       Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
28. STEP 28. Check harness for short circuit to ground between transmission range switch connector B-113 terminal 1 and shift switch assembly connector C-17 terminal 1. 

    Q: Is the harness wire in good condition? 

    1. YES:  Go to Step  5.
    2. NO:  Repair or replace the harness wire.
       Fig 51: Locating Transmission Range Switch Connector B-113

       Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
       Fig 52: Locating Shift Switch Assembly Connector C-17

       Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
29. STEP 29. Check the shift switch assembly. Refer to  , TRANSAXLE CONTROL .

    Q: Is the switch operating properly? 

    1. YES:  Go to Step 30.
    2. NO:  Replace the shift switch assembly. Refer to , TRANSAXLE CONTROL .
30. STEP 30. Check PCM connector B-19 and shift switch assembly connector C-17 for loose, corroded or damaged terminals, or terminals pushed back in the connector. 

    Q: Are the connector and terminals in good condition? 

    1. YES:  Go to Step 31.
    2. NO:  Repair or replace the damaged components. Refer to HARNESS CONNECTOR INSPECTION .
       Fig 53: Locating PCM Connector B-19

       Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
       Fig 54: Locating Shift Switch Assembly Connector C-17

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31. STEP 31. Check harness for short circuit to ground between PCM connector B-19 terminal 39 and shift switch assembly connector C-17 terminal 6. 

    Q: Is the harness wire in good condition? 

    1. YES:  Go to Step  5.
    2. NO:  Repair or replace the harness wire.
       Fig 55: Locating PCM Connector B-19

       Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
       Fig 56: Locating Shift Switch Assembly Connector C-17

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