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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 P182E Or P1915: Internal Mode Switch >> Circuit/System Description

Circuit/System Description

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The manual shift detent lever with shaft position switch assembly or internal mode switch assembly is a sliding contact switch attached to the control valve body within the transmission. The 4 inputs to the Transmission Control Module from the switch indicate which position is selected by the transmission manual shaft. The input voltage at the Transmission Control Module is high when the switch is open and low when the switch is closed to ground. The state of each input is displayed on the scan tool. The input parameters represented are transmission range signal A, Signal B, signal C, and signal P.

The park/neutral position switch is integrated into the transmission internal mode switch. The circuit uses the Transmission Control Module as a pass-through connection only.

The park/neutral signal is sent from the park/neutral switch directly to the engine control module and is used only for engine start enable.

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