Part 2

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





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?
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 below.








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.





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.





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.





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.





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 below.








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.





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.





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.





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.





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.





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








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.





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 (approximately12 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.





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.





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.





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.





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.





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.





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