DESCRIPTION
The CVT fluid temperature sensor converts the CVT fluid temperature into a resistance value for use by the TCM.
The sensor resistance changes with the CVT fluid temperature. As the temperature rises, the sensor resistance decreases. The TCM applies voltage to the temperature sensor through TCM terminal THO1 and calculates the fluid temperature based on the voltage signal.
HINT:
The CVT fluid temperature is likely to increase under conditions such as towing, climbing hills and in traffic.
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
MIL |
Memory |
Note |
---|---|---|---|---|---|---|
P071011 |
Transmission Fluid Temperature Sensor "A" Circuit Short To Ground |
When the auxiliary battery voltage is 8 V or more and the ignition switch is to ON, the CVT fluid temperature sensor voltage is less than 0.142 V for 0.5 seconds (1-trip detection logic). |
|
Comes on |
DTC stored |
SAE Code: P0712 |
MONITOR DESCRIPTION
The CVT fluid temperature sensor converts the CVT fluid temperature to an electrical resistance value. Based on the resistance, the TCM determines the CVT fluid temperature and can detect a short to ground in the CVT fluid temperature circuit. If the resistance value of the CVT fluid temperature is less than 79 Ω*, the TCM interprets this as a malfunction of the CVT fluid temperature sensor or wiring, illuminates the MIL and stores a DTC.
*: 150°C (302°F) or more is indicated regardless of the actual CVT fluid temperature.
HINT:
The CVT fluid temperature can be checked in the Data List.
MONITOR STRATEGY
Related DTCs |
P0712: CVT fluid temperature sensor/Range check (Low voltage) |
Required sensors/Components |
CVT fluid temperature sensor (TFT sensor) |
Frequency of operation |
Continuous |
Duration |
0.5 sec. |
MIL operation |
Immediate |
Sequence of operation |
None |
TYPICAL ENABLING CONDITIONS
The monitor will run whenever the following DTCs are not stored |
None |
Auxiliary battery voltage |
8 V or more |
Ignition switch |
ON |
Starter |
OFF |
TYPICAL MALFUNCTION THRESHOLDS
TFT sensor voltage (CVT fluid temperature) |
Less than 0.142 V (More than 164°C (327°F)) |
COMPONENT OPERATING RANGE
CVT fluid temperature sensor (TFT sensor) voltage |
0.142 V (164°C (327°F)) to 4.915 V (-48°C (-54°F)) |
CONFIRMATION DRIVING PATTERN
HINT:
Click here
HINT:
[*1]: Normal judgment procedure.
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
GTS Display |
Description |
---|---|
NORMAL |
|
ABNORMAL |
|
INCOMPLETE |
|
N/A |
|
HINT:
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Click here
Click here
Click here
PROCEDURE
1. |
READ VALUE USING GTS (A/T OIL TEMPERATURE NO.1) |
(a) Enter the following menus:
(b) According to the display on the GTS, read the Data List.
Powertrain > Transmission > Data List
Tester Display |
Measurement Item |
Range |
Normal Condition |
Diagnostic Note |
---|---|---|---|---|
A/T Oil Temperature No.1 |
CVT fluid temperature sensor value |
Min.: -40°C (-40°F) Max.: 150°C (302°F) |
|
If the value is -40°C (-40°F) or 150°C (302°F) or more, the CVT fluid temperature sensor circuit is open or shorted. |
Tester Display |
---|
A/T Oil Temperature No.1 |
Result |
Proceed to |
---|---|
Data List value is normal |
A |
Data List value is not normal |
B |
B |
GO TO STEP 3 |
|
2. |
REPLACE TCM |
Click here
NEXT |
PERFORM REGISTRATION AND INITIALIZATION for Registration: Click here for Initialization: Click here |
3. |
INSPECT TRANSMISSION WIRE (CVT FLUID TEMPERATURE SENSOR) |
(a) Disconnect the transmission wire connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
11 (OT+) - 12 (OT-) |
Always |
79 Ω to 156 kΩ |
11 (OT+) - Body ground and other terminals |
Always |
10 kΩ or higher |
12 (OT-) - Body ground and other terminals |
Always |
10 kΩ or higher |
HINT:
If the resistance is out of the specified range at any of the CVT fluid temperatures shown in the table below, the driveability of the vehicle may decrease.
CVT Fluid Temperature |
Specified Condition |
---|---|
10°C (50°F) |
5.6 to 7.3 kΩ |
25°C (77°F) |
3.5 kΩ |
110°C (230°F) |
0.22 to 0.27 kΩ |
(c) Connect the transmission wire connector.
NG |
REPLACE TRANSMISSION WIRE |
|
4. |
CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - TCM) |
(a) Disconnect the C80 TCM connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection |
Condition |
Specified Condition |
---|---|---|
C80-51 (THO1) - C80-52 (ETHO) |
Always |
79 Ω to 156 kΩ |
C80-51 (THO1) - Body ground and other terminals |
Always |
10 kΩ or higher |
C80-52 (ETHO) - Body ground and other terminals |
Always |
10 kΩ or higher |
(c) Connect the C80 TCM connector.
NG |
REPAIR OR REPLACE HARNESS OR CONNECTOR (TRANSMISSION WIRE - TCM) |
|
5. |
REPLACE TCM |
Click here
NEXT |
PERFORM REGISTRATION AND INITIALIZATION for Registration: Click here for Initialization: Click here |