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DI-200
DIAGNOSTICS - AUTOMATIC TRANSMISSION
DI1O9-27
DTC P1760 Linear Solenoid for Line Pressure Control
Circuit Malfunction
CIRCUIT DESCRIPTION
The throttle pressure that is applied to the primary regulator
valve (which modulates line pressure) causes the solenoid
Line Pressure
valve SLT, under electronic control, to precisely and minutely
Control Pressure
modulate and generate line pressure according to the accelera-
tor pedal effort, or the detected engine power output.
This reduces the function of line pressure and provides smooth
shifting characteristics.
Current Flow to Solenoid D02290 Upon receiving the throttle valve opening angle signal, ECM
controls the line pressure by sending a predetermined (*) duty
ratio to the solenoid valve, modulating the line pressure, and
generating throttle pressure.
ON (*) 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
OFF is the period of non-continuity, then
1 cycle
A
Duty Ratio = x 100 (%)
BE4056 A+B
DTC No. DTC Detecting Condition Trouble Area
1. or 2. condition below is detected for 1 second or more. S Open or short in shift solenoid valve SLT circuit
P1760 1. SLT- terminal: 0 V S Shift solenoid valve SLT
2. SLT- terminal: 12 V S ECM
HINT:
5 V/
Division
Waveform between terminals SLT+ and SLT- during engine id-
ling is shown at left.
GND
1 msec./Division D01875
2002 4RUNNER (RM887U)
Author : Date : 376
DI-201
DIAGNOSTICS - AUTOMATIC TRANSMISSION
WIRING DIAGRAM
ECM
Transmission
2 5
R-Y
E2 E11 SLT+
Shift Solenoid
Valve SLT
6 11
Y-B
E2 E11 SLT-
D05973
2002 4RUNNER (RM887U)
Author : Date : 377
DI-202
DIAGNOSTICS - AUTOMATIC TRANSMISSION
INSPECTION PROCEDURE
1 Check shift solenoid valve SLT.
PREPARATION:
2 1 (a) Remove the oil pan.
(b) Disconnect the solenoid connector.
Check solenoid resistance:
CHECK:
Measure resistance between terminals 1 and 2 of solenoid con-
nector.
OK:
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