P2743
DTC P2743 TRANSMISSION FLUID TEMPERATURE SENSOR "B" CIRCUIT HIGH INPUTCIRCUIT DESCRIPTION
DTC Detection Condition:
ATF (Automatic Transmission Fluid) temperature sensor No.2 is on the transmission and just in front of the oil cooler inlet pipeline.
If ECM detects the abnormally high temperature of ATF by this sensor, it draws driver's attention by illuminating the warning lamp.
HINT:
- The temperature of ATF easily rises when towing, climbing hills and in traffic, etc.
- If the ATF temperature sensor No.2 becomes short-circuited, the signal that indicates the ATF temperature is 150°C (302°F) or higher is input in ECM.
Vehicle conditions when sensor is normal and when the sensor is short-circuited are indicated in the table.
MONITOR DESCRIPTION
Monitor Strategy:
Typical Enabling Condition:
Typical Malfunction Thresholds:
Component Operating Range:
The Automatic Transmission Fluid (ATF) temperature sensor converts ATF temperature to an electrical resistance value. Based on the resistance, the ECM determines the ATF temperature, and the ECM detects an open or short in the AFT temperature circuit. If the resistance value of the ATF temperature is less than 25 Ohm (0.046 V) or more than 156 kOhm (4.915 V), the ECM interprets this as a fault in the ATF sensor or wiring. The ECM will turn on the MIL and store the DTC.
Wiring Diagram:
Step 1 - 2:
INSPECTION PROCEDURE
HINT: According to the DATA LIST displayed by the hand-held tester, you can read the value of the switch, sensor, actuator and so on without parts removal. Reading the DATA LIST as the first step of troubleshooting is one method to shorten labor time.
NOTE: In the table, 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 hand-held tester together with the CAN VIM (controller area network vehicle interface module) to the DLC3.
d. Turn the ignition switch to the ON position.
e. Turn on the tester.
f. Select the item "DIAGNOSIS / ENHANCED OBD II / DATA LIST".
g. According to the display on the tester, read the "DATA LIST".
HINT:
When DTC P2742 is output and OBD II scan tool or hand-held tester output is 150°C (302°F) or more, there is a short circuit.
When DTC P2743 is output and OBD II scan tool or hand-held tester output is -40°C (-40°F), there is an open circuit.
Measure the resistance between terminal THO2 (OT2) and body ground.