AUTOMATIC TRANSAXLE SYSTEM, Diagnostic DTC:P0712 and P0713
| DTC Code | DTC Name |
|---|---|
| P0712 | Transmission Fluid Temperature Sensor "A" Circuit Low Input |
| P0713 | Transmission Fluid Temperature Sensor "A" Circuit High Input |
DESCRIPTION
Refer to DTC P0711.
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
MIL |
Memory |
|---|---|---|---|---|---|
P0712 |
Transmission Fluid Temperature Sensor "A" Circuit Low Input |
ATF temperature sensor resistance is below 79 Ω for 0.5 sec. or more (1-trip detection logic). |
|
Comes on |
DTC stored |
P0713 |
Transmission Fluid Temperature Sensor "A" Circuit High Input |
ATF temperature sensor resistance is higher than 156 kΩ for 0.5 sec. or more and either condition is met (1-trip detection logic): (A) 426 sec. or more have elapsed after the engine start when the engine coolant temperature or intake air temperature is -29.375°C (-20.875°F) or less.*1 (A) 15 minutes or more have elapsed after the engine start when the engine coolant temperature or intake air temperature is -29.375°C (-20.875°F) or less.*2 (B) 10 sec. or more have elapsed after the engine start when the engine coolant temperature and intake air temperature are higher than -29.375°C (- 20.875°F). |
|
Comes on |
DTC stored |
*1: w/ Canister Pump Module
*2: w/o Canister Pump Module
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 ECM determines the ATF temperature, and the ECM detects an open or short in the ATF temperature circuit. If the resistance value of the ATF temperature is below 79 Ω*1 or higher than 156 kΩ*2, the ECM interprets this as a fault in the ATF sensor or wiring. The ECM will turn on the MIL and store the DTC.
The ATF temperature can be checked on the GTS 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.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
Perform registration and/or initialization when parts related to the automatic transaxle are replaced.
DATA LIST
Tip:Using the GTS 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.
Note: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.
Warm up the engine.
Turn the ignition switch off.
Connect the GTS to the DLC3.
Turn the ignition switch to ON.
Turn the GTS on.
Enter the following menus: Powertrain / Engine and ECT / Data List.
According to the display on the GTS, read the Data List.
Powertrain > Engine and ECT > Data List
Tester Display
Measurement Item
Range
Normal Condition
Diagnostic Note
A/T Oil Temperature 1
ATF temperature sensor value
Min.: -40°C (-40°F)
Max.: 215°C (419°F)
After stall test: Approx. 80°C (176°F)
Equal to ambient temperature after cold soak
If the value is "-40°C (-40°F)" or "150°C (302°F)", the ATF temperature sensor circuit is open or shorted.
Powertrain > Engine and ECT > Data List
Tester Display
A/T Oil Temperature 1
Tip:When DTC P0712 is output and the GTS indicates 150°C (302°F) or higher, there is a short circuit.
When DTC P0713 is output and the GTS indicates -40°C (-40°F), there is an open circuit.
Check the temperature displayed on the GTS in order to check if a malfunction exists.
Temperature Displayed
Malfunction
-40°C (-40°F)
Open circuit
150°C (302°F) or higher
Short circuit
If the 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
CHECK HARNESS AND CONNECTOR (ATF TEMPERATURE SENSOR CIRCUIT)
-
*a
Front view of wire harness connector
(to ECM)
Disconnect the ECM connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection
Condition
Specified Condition
B77-120 (THO1) - B77-119 (ETHO)
Always
79 Ω to 156 kΩ
B77-120 (THO1) - Body ground and other terminals
Always
10 kΩ or higher
B77-119 (ETHO) - Body ground and other terminals
Always
10 kΩ or higher
Result
Proceed to
OK
NG
-
CHECK HARNESS AND CONNECTOR (WIRING HARNESS CONNECTOR - ECM)
Disconnect the B78 wiring harness connector.
Disconnect the B77 ECM connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection
Condition
Specified Condition
B78-13 (OIL) - B77-120 (THO1)
Always
Below 1 Ω
B78-12 (E2) - B77-119 (ETHO)
Always
Below 1 Ω
B78-13 (OIL) or B77-120 (THO1) - Body ground and other terminals
Always
10 kΩ or higher
B78-12 (E2) or B77-119 (ETHO) - Body ground and other terminals
Always
10 kΩ or higher
Result
Proceed to
OK
NG
NG REPAIR OR REPLACE HARNESS OR CONNECTOR
INSPECT ATF TEMPERATURE SENSOR
-
*a
Component without harness connected
(Transmission Wire)
Remove the wiring harness connector.
Measure the resistance according to the value(s) in the table below.
Standard Resistance
Tester Connection
Condition
Specified Condition
A-18 (THO1) - A-17 (E2)
Always
79 Ω to 156 kΩ
A-18 (THO1) - Body ground and other terminals
Always
10 kΩ or higher
A-17 (E2) - Body ground and other terminals
Always
10 kΩ or higher
Tip: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.
ATF Temperature
Specified Condition
10°C (50°F)
5 to 8 kΩ
25°C (77°F)
2.5 to 4.5 kΩ
110°C (230°F)
0.22 to 0.28 kΩ
Result
Proceed to
OK
NG
-