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Home >> GMC >> 2018 >> Acadia Denali, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 12 (Automatic Transmission - 6T50 (M2D) - Diagnostic Information And Procedures) >> Diagnostic Information And Procedures >> DTC P0716, P0717, P07BF, Or P07C0: Input Speed Sensor >> Circuit/System Description

Circuit/System Description

WARNING: This page is about a different variant/trim than selected.

For an overview of the component/system, refer to:Electronic Component Description

Circuit Description
12 V Reference Regulated voltage supplied by the control module.
Signal The control module input circuit has an internal resistance connected to ground.
Component Description
B14C Transmission Input Shaft Speed Sensor The sensor contains a hall-effect sensor and additional electronics that processes the signal. It detects the change of strength of the magnetic field caused by the reluctor ring. When the strength changes, the sensor changes the amount of current it consumes. This results in a square wave signal of the current, while the voltage stays constant. The control module detects the frequency in which the current changes, which is proportional to the rotational speed.
K71 Transmission Control Module The control module receives information from a variety of sensors, switches and serial data information from other control modules. This information is used to control a combination of solenoid valves to obtain the correct line pressure, gear ratio and torque converter clutch operation.
K71 is part of the component: Q8 Control Solenoid Valve Assembly
Automatic Transmission Input Shaft Speed Sensor Reluctor Wheel
  • The reluctor ring has 36 teeth, magnetic segments, or indentations.
  • The reluctor ring is part of the component: 3-5-R & 4-5-6 Clutch Housing Assembly
  • The following components rotate together:
    • 3-5-R & 4-5-6 Clutch Housing Assembly
    • Turbine Shaft
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