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Home >> Mitsubishi >> 2006 >> Eclipse L4-2.4L (4G69) >> Repair and Diagnosis >> A L L Diagnostic Trouble Codes ( DTC ) >> Testing and Inspection >> P Code Charts >> P1770 >> Part 2

Part 2

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

CAUTION: If DTC P1770 (P0705) has been set, TCL related DTC C1397 is also set. After DTC P1770 (P0705) has been diagnosed, don't forget to erase DTC C1397.

Transmission Range Switch System Circuit:




CONNECTOR: A-15:




CONNECTOR: B-113:




CONNECTOR: C-24:




CONNECTORS: B-19, B-20:




CONNECTOR: C-17:




CONNECTOR: C-28:




CONNECTORS: C-202, C-203:





DIAGNOSIS(continued)

Required Special Tools
^ MB991958: Scan Tool (MUT-III) Sub Assembly)
^ MB991824: V.C.I.
^ MB991827: MUT-III USB Cable
^ MB991910: MUT-III Main Harness A

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.

CONNECTOR: B-20:




CONNECTOR: B-113:





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 B-20 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

CONNECTOR: B-20:





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 transmission range switch.











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

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?
YES: Go to Step 13.
NO: Replace the transmission range switch.

STEP 13. Check transmission range switch connector B-113 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

CONNECTOR: B-113:





Q: Are the connector and terminals in good condition?
YES: Go to Step 14.
NO: Repair or replace the damaged components.

STEP 14. Measure the transmission range switch output voltage at PCM connector B-20 by using check harness special tool MB991923.

CONNECTOR: B-20:





1. Disconnect all the connectors from the PCM.





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.





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?
YES: Go to Step 11.
NO: Go to Step 15.

STEP 15. Check PCM connector B-20 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

CONNECTOR: B-20:





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 PCM connector B-20 terminal 61 and transmission range switch connector B-113 terminal 7.

CONNECTOR: B-20:




CONNECTOR: B-113:





Q: Is the harness wire in good condition?
YES: Go to Step 5.
NO: Repair or replace the harness wire.

STEP 17. Check the transmission range switch.











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

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?
YES: Go to Step 18.
NO: Replace the transmission range switch.

STEP 18. Check transmission range switch connector B-113 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

CONNECTOR: B-113:





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 transmission range switch output voltage at PCM connector B-20 by using check harness special tool MB991923.

CONNECTOR: B-20:





1. Disconnect all the connectors from the PCM.





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.





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?
YES: Go to Step 11.
NO: Go to Step 20.

STEP 20. Check PCM connector B-20 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

CONNECTOR: B-20:





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 PCM connector B-20 terminal 77 and transmission range switch connector B-113 terminal 4.

CONNECTOR: B-20:




CONNECTOR: B-113:





Q: Is the harness wire in good condition?
YES: Go to Step 5.
NO: Repair or replace the harness wire.

STEP 22. Check the transmission range switch.







CONNECTOR: B-113:





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

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?
YES: Go to Step 23.
NO: Replace the transmission range switch.

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?
YES: Go to Step 24.
NO: Repair or replace the damaged components.

STEP 24. Measure the transmission range switch output voltage at PCM connector B-20 by using check harness special tool MB991923.

CONNECTOR: B-20:





1. Disconnect all the connectors from the PCM.





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.





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?
YES: Go to Step 11.
NO: Go to Step 25.

STEP 25. Check PCM connector B-20 for loose, corroded or damaged terminals, or terminals pushed back in the connector.

CONNECTOR: B-20:





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 PCM connector B-20 terminal 73 and transmission range switch connector B-113 terminal 1.

CONNECTOR: B-20:




CONNECTOR: B-113:





Q: Is the harness wire in good condition?
YES: Go to Step 27.
NO: Repair or replace the harness wire.

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.

CONNECTOR: A-15:




CONNECTOR: C-17:





Q: Are the connector and terminals in good condition?
YES: Go to Step 28.
NO: Repair or replace the damaged components.

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.

CONNECTOR: B-113:




CONNECTOR: C-17:





Q: Is the harness wire in good condition?
YES: Go to Step 5.
NO: Repair or replace the harness wire.

STEP 29. Check the shift switch assembly.
Q: Is the switch operating properly?
YES: Go to Step 30.
NO: Replace the shift switch assembly.

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.

CONNECTOR: B-19:




CONNECTOR: C-17:





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

CONNECTOR: B-19:




CONNECTOR: C-17:





Q: Is the harness wire in good condition?
YES: Go to Step 5.
NO: Repair or replace the harness wire.

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