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Home >> Cadillac >> 2013 >> Escalade Hybrid, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 6 (Automatic Transmission - 6L80/6L90 - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> DTC P0842 or P0843 >> Circuit/System Description

Circuit/System Description

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The Transmission Fluid Pressure Switch 1 is part of the control solenoid valve assembly which has no serviceable parts. The Transmission Control Module supplies a signal circuit to the Transmission Fluid Pressure Switch 1. The Transmission Fluid Pressure Switch 1 has an internal case ground. Transmission Fluid Pressure Switch 1 is normally closed or LOW. When oil pressure is present at the Transmission Fluid Pressure Switch 1, the switch is open or HIGH. The normally high clutch pressure control (PC) solenoid 2 controls pressure to the 3-5 reverse clutch regulator valve. The Transmission Control Module monitors the Transmission Fluid Pressure Switch 1 to determine the position of the 3-5 reverse clutch regulator valve. When the 3-5 reverse clutch is commanded OFF, pressure is present on the Transmission Fluid Pressure Switch 1. When the 3-5 reverse clutch is commanded ON, the 3-5 reverse clutch regulator valve moves and pressure to the Transmission Fluid Pressure Switch 1 is exhausted through the 3-5 reverse clutch regulator valve.

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