Monitor Description
WARNING: This page is about a different car, the 2017 Lexus RC 350, 2017 Lexus RC 300, 2016 Lexus RC 350, 2016 Lexus RC 300, and 2015 Lexus RC 350. However, it is still accessible from the selected car via links, so may be relevant.
These DTCs indicate an open or short in the shift solenoid valve S4 circuit. When there is an open or short circuit in any shift solenoid valve circuit, the ECM detects the problem and illuminates the MIL and stores a DTC. When the shift solenoid valve S4 is on, if resistance is 8 Ω or less, the ECM determines there is a short in the shift solenoid valve S4 circuit.
When the shift solenoid valve S4 is off, if resistance is 100 kΩ or more, the ECM determines there is an open in the shift solenoid valve S4 circuit.
Refer to FAIL-SAFE CHART [09/2014 - 10/2015] , or refer to FAIL-SAFE CHART [10/2015 - 11/2017]