DTC P0711

DTC P0711:  ATF Temperature Sensor (Range/Performance)

General Description 

Courtesy of HONDA, U.S.A., INC.

Courtesy of HONDA, U.S.A., INC.

The ATF temperature sensor is integrated to the sensor unit in the transmission. The transmission control module (TCM) monitors ATF temperature measured from the ATF temperature sensor and estimated ATF temperature. If the difference between the ATF temperature measured from the ATF temperature sensor and the estimated ATF temperature is larger than a specified value, or if there is an abnormal temperature change in ATF temperature measured from the ATF temperature sensor, the TCM detects a malfunction and stores a DTC.

Monitor Execution, Sequence, Duration, DTC Type 

Execution	Continuous
Sequence	None
Duration	Depending on the driving conditions
DTC Type	One drive cycle, MIL on*, A/T gear position indicator blinks

*: MIL comes on at second drive cycle

Enable Conditions 

Condition	Minimum	Maximum
Engine speed [Engine Speed] or transmission input speed [Transmission Input Speed]	400 rpm	-

[ ]: HDS Parameter

Condition	Minimum	Maximum
Transmission output speed [Transmission Output Speed]	250 rpm	-
Other	Pressure regulator power supply is switched on

[ ]: HDS Parameter

Malfunction Threshold 

One of these symptoms occurs:

Symptom 1

• The difference between the ATF temperature sensor value [ATF Temperature] and the estimated ATF temperature is more than 108 °F (60 °C) for at least 300 seconds after the ATF temperature sensor value [ATF Temperature] change was 9 °F (5 °C) or less for 300 seconds. (Flat gradient)
• The difference between the ATF temperature sensor value [ATF Temperature] and the estimated ATF temperature is more than 144 °F (80 °C) for at least 300 seconds after the ATF temperature sensor value [ATF Temperature] change was more than 9 °F (5 °C) for 120 seconds. (Steep gradient)

Symptom 2

• The ATF temperature sensor value [ATF Temperature] is 14 °F (-10 °C) or less after once it was 50 °F (10 °C) or more.

Symptom 3

• The ATF temperature sensor value [ATF Temperature] increase is 5 °F (3 °C) or less after the engine run for at least 300 seconds when the engine is started at ATF temperature sensor value [ATF Temperature] of 32 °F (0 °C) or less.

Possible Cause 

• ATF temperature sensor TATFP line open (includes a loose or disconnected connector)
• ATF temperature sensor TATFM line open (includes a loose or disconnected connector)
• ATF temperature sensor TATFP line short to ground
• ATF temperature sensor TATFM line short to ground
• Sensor unit failure (ATF temperature sensor)
• TCM internal failure

Confirmation Procedure 

Operating Condition 

Symptom 1

• 1.

  Start the engine.

• 2.

  Drive the vehicle for at least 10 minutes.

Symptom 2

• 1.

  Start the engine.

• 2.

  Keep driving until the ATF temperature sensor value [ATF Temperature] increases to 50 °F (10 °C) or more.

• 3.

  Drive the vehicle for a while.

Symptom 3

• 1.

  Start the engine with the ATF temperature sensor value [ATF Temperature] at 32 °F (0 °C) or less.

• 2.

  Drive the vehicle for at least 10 minutes.

• Drive the vehicle in this manner only if the traffic regulations and ambient conditions allow.

With the HDS 

None.

Diagnosis Details 

Conditions for setting the DTC 

When a malfunction is detected during the first drive cycle, the A/T gear position indicator blinks and a Pending DTC, a Confirmed DTC, and the freeze data are stored in the TCM memory. If the malfunction returns in the next (second) drive cycle, the MIL comes on.

Conditions for clearing the DTC 

The A/T gear position indicator comes off by turning the vehicle to the OFF (LOCK) mode. The MIL is cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The MIL, the Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command.