P1765

CIRCUIT DESCRIPTION
The shift solenoid valve SLN controls the hydraulic pressure acting on the accumulator control valve when gears are shifted and performs smooth gear shifting.
The ECM determines optimum operating pressure according to the signals from the throttle position sensor, vehicle speed sensor and direct clutch speed sensor and controls the volume of current flow to the solenoid valve.
The amount of current to the solenoid is controlled by the (*) duty ratio of ECM output signals, causing a momentary change to the hydraulic pressure acting on the clutches during gear shifting. When the duty ratio high, the hydraulic pressure acting on the clutches is low.





(*) 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






DETECTING CONDITION




- Reference waveform between terminals SLN- and El when engine is idling.





- Reference waveform between terminals SLN- and E1 during shift change.





WIRING DIAGRAM








INSPECTION PROCEDURE