P1710

DTC P1710 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-II Reference Value

On Board Diagnosis Logic
^ This is an OBD-II self-diagnostic item.
^ Diagnostic trouble code "ATF TEMP SEN/CIRC" with CONSULT-II or P1710 (A/T), P0710 (ENGINE) without CONSULT-II is detected when TCM receives an excessively low or high voltage from the sensor.

Possible Cause
^ Harness or connectors (The sensor circuit is open or shorted.)
^ A/T fluid temperature sensors 1, 2

DTC Confirmation Procedure

CAUTION: Always drive vehicle at a safe speed.

NOTE: If "DTC Confirmation Procedure" has been previously conducted, always turn ignition switch "OFF" and wait at least 10 seconds before conducting the next test.

After the repair, perform the following procedure to confirm the malfunction is eliminated.

WITH CONSULT-II
1. Turn ignition switch to "ON" position. (Do not start engine.)





2. Select "DATA MONITOR" mode for "ENGINE" with CONSULT-II.
3. Start engine and maintain the following conditions for at least 10 minutes (Total). (It is not necessary to maintain continuously.)
VHCL SPEED SE: 10 km/h (6 MPH) or more
THRTL POS SEN: More than 1.0/8
Selector lever: "D" position
4. If DTC is detected, go to "Diagnostic Procedure".

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

AT-FTS-01:

Wiring Diagram-AT-FTS

TCM terminals and data are reference value. Measured between each terminal and ground.

Diagnostic Procedure
1. CHECK INPUT SIGNALS (WITH CONSULT-II)

With CONSULT-II
1. Start engine.








2. Select "TCM INPUT SIGNALS" in "DATA MONITOR" mode for "A/T" with CONSULT-II.
3. Read out the value of "ATF TEMP SE 1" or "ATF TEMP SE 2".

OK or NG
OK >> GO TO 7.
NG >> GO TO 3.

2. CHECK INPUT SIGNALS (WITHOUT CONSULT-II)

Without CONSULT-II
1. Start engine.








2. Check voltage between TCM connector and ground while warming up A/T. Refer to "Wiring Diagram-AT-FTS".
3. Turn ignition switch to "OFF" position.
4. Disconnect the TCM connector.
5. Check if there is continuity between the connector terminal and ground.

OK or NG
OK >> GO TO 7.
NG >> GO TO 3.

3. CHECK FLUID TEMPERATURE SENSOR CIRCUIT
1. Turn ignition switch to "OFF" position.
2. Disconnect A/T unit assembly harness connector at the transmission right side.








3. Check the resistance between terminal and ground.
4. Reinstall any part removed.

OK or NG
OK >> GO TO 7.
NG >> GO TO 4.

4. CHECK TERMINAL CORD ASSEMBLY
1. Remove oil pan.








2. Disconnect A/T unit assembly harness connector and control valve assembly harness connector.
3. Check continuity between A/T unit assembly harness connector and control valve assembly harness connector.
4. If OK, check harness for short to ground and short to power.
5. 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 HARNESS BETWEEN FLUID TEMPERATURE SENSOR 2 AND CONTROL VALVE ASSEMBLY
1. Disconnect fluid temperature sensor 2 harness connector and control valve assembly harness connector.








2. Check continuity between fluid temperature sensor 2 harness connector and control valve assembly harness connector.

OK or NG
OK >> GO TO 6.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.

6. CHECK FLUID TEMPERATURE SENSOR 2
Check fluid temperature sensor 2.
^ Refer to "Component Inspection".

OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.

7. DETECT MALFUNCTIONING ITEM
Check the following items:
^ Harness for short to ground or short to power or open between TCM and A/T unit assembly harness connector.

OK or NG
OK >> GO TO 8.
NG >> Repair or replace damaged parts.

8. CHECK DTC
Perform "DTC Confirmation Procedure".

OK or NG
OK >> INSPECTION END
NG >> GO TO 9.

9. PERFORM TCM INSPECTION
1. Perform TCM input/output signal inspection.
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
FLUID TEMPERATURE SENSOR 2
1. Remove fluid temperature sensor 2.








2. Check resistance between terminal 1 and 2.