P0712

U760E AUTOMATIC TRANSMISSION / TRANSAXLE: AUTOMATIC TRANSAXLE SYSTEM: P0712, P0713: Transmission Fluid Temperature Sensor "A" Circuit Low Input


DESCRIPTION

Refer to DTC P0711 P0711.





MONITOR DESCRIPTION

These DTCs indicate an open or short in the ATF temperature sensor circuit. The ATF temperature sensor converts ATF temperature into an electrical resistance value. Based on the resistance, the TCM determines the ATF temperature, and the TCM detects an open or short in the ATF temperature circuit. If the resistance value of the ATF temperature is below 79 Ohms*1 or higher than 156 kOhms*2, the TCM interprets this as a fault in the ATF sensor or wiring. The TCM will turn on the MIL and store the DTC.

HINT
- The ATF temperature can be checked on the Techstream display.
- *1: 150°C (302°F) or higher is indicated regardless of the actual ATF temperature.
- *2: -40°C (-40°F) is indicated regardless of the actual ATF temperature.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS

P0712: Range Check (Low Resistance)

*





P0713: Range Check (High Resistance)

- Either condition is met: Condition (A) or (B)

Condition (A)

*





Condition (B)

*





TYPICAL MALFUNCTION THRESHOLDS

P0712: Range Check (Low Resistance)





P0713: Range Check (High Resistance)





COMPONENT OPERATING RANGE





WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
Perform the universal trip to clear permanent DTCs Reading and Clearing Diagnostic Trouble Codes.

1. DATA LIST

HINT
Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time.

NOTICE:
In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.

(a) Warm up the engine.

(b) Turn the ignition switch off.

(c) Connect the Techstream to the DLC3.

(d) Turn the ignition switch to ON.

(e) Turn the Techstream on.

(f) Enter the following menus: Powertrain / ECT / Data List.

(g) According to the display on the Techstream, read the Data List.

ECT





HINT
When DTC P0712 is output and the Techstream indicates 150°C (302°F) or higher, there is a short circuit.

When DTC P0713 is output and the Techstream indicates -40°C (-40°F), there is an open circuit.

Check the temperature displayed on the Techstream in order to check if a malfunction exists.





If a circuit related to the ATF temperature sensor becomes open, P0713 is immediately stored (in 0.5 seconds). When P0713 is stored, P0711 cannot be stored.

It is not necessary to inspect the circuit when P0711 is stored.

PROCEDURE

1. INSPECT TRANSMISSION WIRE (ATF TEMPERATURE SENSOR)

(a) Remove the TCM.





(b) Measure the resistance according to the value(s) in the table below.

Standard Resistance:





HINT
If the resistance is out of the specified range at any of the ATF temperatures shown in the table below, the driveability of the vehicle may decrease.

Resistance (Reference):





Text in Illustration





NG -- REPLACE ATF TEMPERATURE SENSOR (TRANSMISSION WIRE) Removal

OK -- REPLACE TCM Removal