Automatic Transmission

DTC P0710 A/T FLUID TEMPERATURE SENSOR CIRCUIT





Description
The A/T fluid temperature sensor detects the A/T fluid temperature and sends a signal to the TCM.




CONSULT-III Reference Value in Data Monitor Mode









On Board Diagnosis Logic
- This is an OBD-II self-diagnostic item.
- Diagnostic trouble code "P0710 ATF TEMP SEN/CIRC" with CONSULT-III is detected when TCM receives an excessively low or high voltage from the sensor.




Possible Cause
- Harness or connector
(The sensor circuit is open or shorted.)
- A/T fluid temperature sensor




DTC Confirmation Procedure

CAUTION:
- Always drive vehicle at a safe speed.
- If performing this "DTC Confirmation Procedure" again, always turn ignition switch OFF and wait at least 10 seconds before continuing.
After the repair, perform the following procedure to confirm the malfunction is eliminated.

WITH CONSULT-III
1. Turn ignition switch ON and select "DATA MONITOR" mode for "TRANSMISSION" with CONSULT-III.
2. Touch "START".
3. Start engine and maintain the following conditions for at least 10 minutes (Total). (It is not necessary to maintain continuously.)
ENGINE SPEED: 450 rpm or more
VEHICLE SPEED: 10 km/h (6 MPH) or more
THROTTLE POSI: More than 1.0/8
SLCT LVR POSI: "D" position
4. If the check result is NG, go to "Diagnosis Procedure".

WITH GST
Follow the procedure "With CONSULT-III".




Wiring Diagram - AT - FTS






TCM TERMINALS AND REFERENCE VALUES
Refer to Pinout Values and Diagnostic Parameters.




Diagnosis Procedure
1.CHECK INPUT SIGNAL
With CONSULT-III
1. Start engine.
2. Select "TCM INPUT SIGNALS" in "DATA MONITOR" mode for "TRANSMISSION" with CONSULT-III.
3. Read out the value of "FLUID TEMP SE".





Without CONSULT-III
1. Start engine.





2. Check voltage TCM connector terminals while warming up A/T.





OK or NG
OK >> GO TO 7.
NG >> GO TO 2.
2.DETECT MALFUNCTIONING ITEMS
Check the following.
- Harness for short or open between TCM, ECM and terminal cord assembly
- Ground circuit for ECM, Refer to Wiring Diagram Up to VIn #386333 (MR Type 1) or From VIn #386334 (MR Type 2).
OK or NG
OK >> GO TO 3.
NG >> Repair or replace damaged parts.
3. CHECK FLUID TEMPERATURE SENSOR CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect the TCM connector.
3. Check resistance between TCM connector terminals.










OK or NG
OK >> GO TO 7.
NG >> GO TO 4.
4. CHECK HARNESS BETWEEN TCM AND TERMINAL CORD ASSEMBLY HARNESS CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect terminal cord assembly harness connector and TCM connector.





3. Check continuity between terminal cord assembly harness connector terminal and TCM connector terminal.





4. If OK, check harness for short to ground and short to power.
5. If OK, check continuity between ground and transaxle assembly.
6. Reinstall any part removed.
OK or NG
OK >> GO TO 5.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
5.CHECK A/T FLUID TEMPERATURE SENSOR WITH TERMINAL CORD ASSEMBLY
1. Turn ignition switch OFF.
2. Disconnect terminal cord assembly harness connector in engine room.





3. Check resistance between terminal cord assembly harness connector terminals.





4. Reinstall any part removed.
OK or NG
OK >> GO TO 6.
NG >> Repair or replace damaged parts.
6.DETECT MALFUNCTIONING ITEM
1. Remove oil pan. Refer to Service and Repair.
2. Check the following.
- A/T fluid temperature sensor





- Check resistance between terminal cord assembly harness connector terminals while changing temperature as shown.





- Harness of terminal cord assembly for short or open
OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.
7.CHECK DTC
Perform "DTC Confirmation Procedure".
OK or NG
OK >> INSPECTION END
NG >> GO TO 8.
8.CHECK TCM
1. Check TCM input/output signal. Refer to Pinout Values and Diagnostic Parameters.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
OK or NG
OK >> INSPECTION END
NG >> Repair or replace damaged parts.




Component Inspection

A/T FLUID TEMPERATURE SENSOR
- Remove oil pan. Refer to Service and Repair.





- Check resistance between terminal cord assembly harness connector terminals while changing temperature as shown.