P2742

DTC P2742 TRANSMISSION FLUID TEMPERATURE SENSOR "B" CIRCUIT LOW INPUT

CIRCUIT DESCRIPTION

DTC Detection Condition:

ATF 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.

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 ohms or more than 156 kohms, 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:

Step 2:

INSPECTION PROCEDURE