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Home >> Mitsubishi >> 2004 >> Lancer Sportback L4-2.4L SOHC >> Repair and Diagnosis >> A L L Diagnostic Trouble Codes ( DTC ) >> Testing and Inspection >> P Code Charts >> P0705 >> Part 2

Part 2

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

Part 1:




Part 2:






CIRCUIT OPERATION
^ Battery positive voltage is applied to the transmission range switch (terminal 8) when the ignition switch is turned "ON."
^ Battery positive voltage is applied to the PCM (terminal 66) when the transmission range is in the "P" range. The PCM judges that the transmission range is in the "P" range when the battery positive voltage is applied.
^ Battery positive voltage is applied to the PCM terminal 67 (75, 76, 85, 77 or 68) when the selector lever is in the "R" range ("N," "D," "3," "2" or "L" range). The PCM judges that the selector lever is in the "R" range ("N," "D," "3," "2" or"L" range) when the battery positive voltage is applied.

DESCRIPTIONS OF MONITOR METHODS
^ If no signal is input from transmission range switch for more than 30 seconds, PCM judges that transmission range switch has a failure.

MONITOR EXECUTION
^ Continuous

MONITOR EXECUTION CONDITIONS (OTHER MONITOR AND SENSOR)
Other Monitor (There is no temporary DTC stored in memory for the item monitored)
^ Not applicable

Sensor (The sensor below is determined to be normal)
^ Not applicable





LOGIC FLOW CHARTS (Monitor Sequence)

DTC SET CONDITIONS
Check Conditions, Judgement Criteria
^ Transmission range switch: no signal detected. (30 seconds)

OBD-II DRIVE CYCLE PATTERN
Start the engine, keep the vehicle stopped in "P," "R," "N," "D," "3," "2" and "L" ranges respectively for more than one minute, and turn "LOCK" (OFF) the ignition switch. Then restart the engine, and stop the vehicle in "P," "R," "N," "D," "3," "2" and "L" ranges respectively for more than one minute.

TROUBLESHOOTING HINTS (THE MOST LIKELY CAUSES FOR THIS CODE TO BE SET ARE:)
^ Malfunction of the transmission range switch
^ Malfunction of the ignition switch
^ Damaged harness or connector
^ Malfunction of the PCM

DIAGNOSIS

Required Special Tool:
^ MB991958: Scan Tool (MUT-III Sub Assembly)
^ MB991824: V.C.I.
^ MB991827: MUT-III USB Cable
^ MB991911: MUT-III Main Harness B

STEP 25. Check PCM connector C-112 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 transmission range switch connector B-16 terminal 1 and PCM connector C-112 terminal 76.








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

STEP 27. 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 28.
NO: Replace the transmission range switch.

STEP 28. Check transmission range switch connector B-16 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 29.
NO: Repair or replace the damaged components.

STEP 29. Measure the transmission range switch output voltage at PCM connector C-112 by backprobing.





1. Do not disconnect connector C-112.
2. Turn the ignition switch to the "ON" position.
3. Move the selector lever to the "3" position.





4. Measure the voltage between terminal 85 and ground.
^ The voltage should measure battery positive voltage.
5. 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 30.

STEP 30. Check PCM connector C-112 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 open circuit or short circuit to ground between transmission range switch connector B-16 terminal 5 and PCM connector C-112 terminal 85.








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

STEP 32. 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 33.
NO: Replace the transmission range switch.

STEP 33. Check transmission range switch connector B-16 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 34.
NO: Repair or replace the damaged components.

STEP 34. Measure the transmission range switch output voltage at PCM connector C-112 by backprobing.





1. Do not disconnect connector C-112.
2. Turn the ignition switch to the "ON" position.
3. Move the selector lever to the "2" position.





4. Measure the voltage between terminal 77 and ground.
^ The voltage should measure battery positive voltage.
5. 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 35.

STEP 35. Check PCM connector C-112 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. Check harness for open circuit or short circuit to ground between transmission range switch connector B-16 terminal 2 and PCM connector C-112 terminal 77.








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

STEP 37. 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 38.
NO: Replace the transmission range switch.

STEP 38. Check transmission range switch connector B-16 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 39.
NO: Repair or replace the damaged components.

STEP 39. Measure the transmission range switch output voltage at PCM connector C-112 by backprobing.





1. Do not disconnect connector C-112.
2. Turn the ignition switch to the "ON" position.
3. Move the selector lever to the "L" position.





4. Measure the voltage between terminal 68 and ground.
^ The voltage should measure battery positive voltage.
5. 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 40.

STEP 40. Check PCM connector C-112 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. Check harness for open circuit or short circuit to ground between transmission range switch connector B-16 terminal 6 and PCM connector C-112 terminal 68.








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




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