P0710

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.




On Board Diagnosis Logic
- This is an OBD-II self-diagnostic item.
- Diagnostic trouble code "ATF TEMP SEN/CIRC" with CONSULT-III or P0710 without CONSULT-III is detected under the following conditions.
- When normal voltage not applied to ATF temperature sensor due to open, short, and so on.
- When during running, the ATF temperature sensor signal voltage is excessively high or low.




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




DTC Confirmation Procedure

NOTE:
If "DTC Confirmation Procedure" has been previously performed, always turn ignition switch "OFF" and wait at least 10 seconds before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.

WITH CONSULT-III
1. Turn ignition switch "ON". (Do not start engine.)
2. Select "DATA MONITOR" mode for "TRANSMISSION" with CONSULT-III.
3. Start engine.
4. Warm up engine so that engine coolant temperature is more than 50�C (122�F).
COOLAN TEMP: More than 50�C (122�F)
5. Maintain the following conditions for at least 16 minutes (Total). (It is not necessary to drive vehicle.)
COOLAN TEMP: More than 50�C (122�F)
SLCT LVR POSI: "D" position
6. If DTC is detected, go to "Diagnosis Procedure".

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




Wiring Diagram - AT - FTS

AT-FTS-01:

TCM Input/Output Signal Reference Values. Refer to Pinout Values and Diagnostic Parameters.




Diagnosis Procedure
1.CHECK FLUID TEMPERATURE SENSOR SIGNAL
With CONSULT-III
1. Start engine.
2. Select "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 between TCM connector terminals 41 and 42 while warming up A/T. Refer to "Wiring Diagram - AT - FTS".






3. Turn ignition switch "OFF".
4. Disconnect the TCM connector.
5. Check if there is continuity between the connector terminal and ground.
OK or NG
OK - GO TO 6.
NG - GO TO 2.
2.CHECK FLUID TEMPERATURE SENSOR CIRCUIT
1. Turn ignition switch "OFF".
2. Disconnect the TCM connector.






3. Check resistance between terminals 41 and 42.






4. Check if there is continuity between the connector terminal and ground.
OK or NG
OK - GO TO 6.
NG - GO TO 3.
3.CHECK TERMINAL CORD ASSEMBLY WITH A/T FLUID TEMPERATURE SENSOR
1. Turn ignition switch "OFF".
2. Disconnect terminal cord assembly harness connector.






3. Check resistance between terminals 4 and 8.






OK or NG
OK - GO TO 4.
NG - GO TO 5.
4.CHECK HARNESS BETWEEN TCM AND TERMINAL CORD ASSEMBLY

Check the following.
- Open or short-circuit in the harness between TCM and terminal cord assembly.
OK or NG
OK - GO TO 6.
NG - Repair or replace damaged parts.
5.CHECK A/T FLUID TEMPERATURE SENSOR
1. Remove side cover. Refer to Service and Repair.
2. Disconnect A/T fluid temperature sensor.






3. Check resistance between terminals 4 and 8.






OK or NG
OK - GO TO 6.
NG - Repair or replace transmission wire. Refer to Transmission Wire.
6.CHECK DTC
Perform "DTC Confirmation Procedure". Refer to "DTC Confirmation Procedure".
OK or NG
OK - INSPECTION END
NG - GO TO 7.
7.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
1. Remove side cover. Refer to Service and Repair.
2. Disconnect A/T fluid temperature sensor.






3. Check resistance between terminals 4 and 8.






4. If NG, repair and replace transmission wire. Refer to Transmission Wire.