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Home >> Cadillac >> 2018 >> Escalade Base, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 19 (Automatic Transmission - 6L80 (MYC) Or 6L90 (MYD) - Diagnostic Information And Procedures) >> Diagnostic Information And Procedures >> DTC P0722 Or P0723: Output Speed Sensor Circuit >> Circuit/System Description

Circuit/System Description

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The automatic transmission input and output speed sensor (ISS and OSS) assembly each are part of a single harness. The OSS is a hall-effect type sensor. The ISS/OSS mounts to the control valve upper body assembly. The sensor end faces the output shaft housing machined slots. The sensor receives 9 volts on the ISS/OSS supply voltage circuit from the control solenoid valve assembly. As the output shaft rotates, the sensor produces a signal frequency based on the machined slots of the output shaft housing. This signal is transmitted through the OSS signal circuit to the control solenoid valve assembly. The control solenoid valve assembly uses the OSS signal to determine line pressure, transmission shift patterns, torque converter clutch (TCC) slip speed and gear ratio.

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