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Home >> Toyota >> 2004 >> Highlander Limited, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Automatic Transmission Electronic Controlled (ECT) - U241E/U140F - Diagnostics) >> DTC P2716: Pressure Control Solenoid "D" Electrical (Shift Solenoid SLT) >> Circuit Description

Circuit Description

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

The linear solenoid valve (SLT) controls the transmission line pressure for smooth transmission operation based on signals from the throttle position sensor and the vehicle speed sensor. The ECM adjusts the duty cycle of the SLT solenoid valve to control hydraulic line pressure coming from the primary regulator valve. Appropriate line pressure assures smooth shifting with varying engine outputs.

(*): Duty Ratio

The duty ratio is the ratio of the period of continuity in one cycle. For example, if A is the period of continuity in one cycle, and B is the period of non-continuity, then Duty Ratio=A/ (A+B) x 100 (%)

Fig 1: Pressure Control Solenoid Graph
G02908840Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 2: Identifying Duty Ratio
G02908841Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 3: DTC Trouble Area Chart
G02908842Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002