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Home >> Toyota >> 2016 >> 4Runner Limited, AWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 5 (Automatic Transmission System (A750E) - Diagnostic Codes & Circuit Tests) >> Automatic Transmission System >> DTC P2742: Transmission Fluid Temperature Sensor "B" Circuit Low Input; DTC P2743: Transmission Fluid Temperature Sensor "B" Circuit High Input [08/2019 - ] >> Monitor Description

Monitor Description

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The ATF temperature sensor converts the 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 sensor is below 25 Ω*1 or higher than 156 kΩ*2, the ECM interprets this as a fault in the ATF sensor or wiring. The ATF temperature warning light blinks and the ECM stores the DTC.

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