Part 2 of 2

DTC 27 (P0705): Transmission Range Switch System (Open Circuit)

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DIAGNOSIS

STEP 19. Measure the transmission range switch output voltage at PCM connector B-21 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-21 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-21 terminal 77 and transmission range switch connector B-110 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.

















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-110 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-21 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 (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-21 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-21 terminal 73 and transmission range switch connector B-110 terminal 1.








Q: Is the harness wire in good condition?
YES : Go to Step 5.
YES : Go to Step 27.
NO: Repair or replace the harness wire.

STEP 27. Check intermediate connector A-13 and shift switch assembly connector C-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 28.
NO: Repair or replace the damaged components.

STEP 28. Check harness for short circuit to ground between transmission range switch connector B-110 terminal 1 and shift switch assembly connector C-20 terminal 6.








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

STEP 29. Check the transmission range switch.











Measure the resistance between the terminals for each transmission range as indicated in the table.
Q: Is the measured resistance less than 2 ohms for each transmission range.
YES: Go to Step 30.
NO: Replace the transmission range switch.

STEP 30. Check transmission range switch connector B-110 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. Measure the transmission range switch output voltage at PCM connector B-21 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 "3" position.





5. Measure the voltage between terminal 62 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 32.

STEP 32. Check PCM connector B-21 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 33.
NO: Repair or replace the damaged components.

STEP 33. Check harness for open circuit or short circuit to ground between PCM connector B-21 terminal 62 and transmission range switch connector B-110 terminal 5.








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

STEP 34. Check the transmission range switch.











Measure the resistance between the terminals for each transmission range as indicated in the table.
Q: Is the measured resistance less than 2 ohms for each transmission range.
YES: Go to Step 35.
NO: Replace the transmission range switch.

STEP 35. Check transmission range switch connector B-110 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. Measure the transmission range switch output voltage at PCM connector B-21 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 "2" position.





5. Measure the voltage between terminal 75 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 37.

STEP 37. Check PCM connector B-21 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 38.
NO: Repair or replace the damaged components.

STEP 38. Check harness for open circuit or short circuit to ground between PCM connector B-21 terminal 75 and transmission range switch connector B-110 terminal 2.








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

STEP 39. Check the transmission range switch.











Measure the resistance between the terminals for each transmission range as indicated in the table.
Q: Is the measured resistance less than 2 ohms for each transmission range.
YES: Go to Step 40.
NO: Replace the transmission range switch.

STEP 40. Check transmission range switch connector B-110 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. Measure the transmission range switch output voltage at PCM connector B-21 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 "L" position.





5. Measure the voltage between terminal 72 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 42.

STEP 42. Check PCM connector B-21 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 43.
NO: Repair or replace the damaged components.

STEP 43. Check harness for open circuit or short circuit to ground between PCM connector B-21 terminal 72 and transmission range switch connector B-110 terminal 6.








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

STEP 44. Check PCM connector B-20 and shift switch assembly connector C-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 45.
NO: Repair or replace the damaged components.

STEP 45. Check harness for short circuit to ground between PCM connector B-20 terminal 39 and shift switch assembly connector C-20 terminal 3.








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