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Home >> Chevrolet >> 2024 >> Tahoe Commercial, 4WD >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission - 10L80 (MHS MHU MQC) - Diagnostic Information And Procedures (1 Of 2) >> Diagnostic Information and Procedures >> DTC P176B-P176D, P178F, or P17D3 >> Circuit/System Description

Circuit/System Description

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

Circuit Description
9 V Reference Regulated voltage supplied by the control module.
Signal The sensor produces a frequency modulated signal.
Component Description
B14DA Automatic Transmission Intermediate Speed Sensor 1 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 current and voltage. The control module detects the frequency in which the signal changes, which is proportional to the rotational speed.
K71 Transmission Control Module The control module contains a microprocessor used to process input data to control outputs.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.
Reluctor Ring
  • The reluctor ring has 50 teeth, magnetic segments, or indentations.
  • The reluctor ring is part of the component: Reaction Carrier Assembly
  • The Reaction Carrier assembly rotates in 7, 8, 9, and 10th gear

The sensor is an input to the control module K71.The input signal is used to determine the rotational speed of the component: Reaction Carrier Assembly