Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Toyota Echo 2000-2002 Approved techinfo.toyota.com ileaf 02toyrm 02toypdf 02rmsour 2002 02echorm di ax cip1760
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DI-186
DIAGNOSTICS - AUTOMATIC TRANSAXLE
DI6UH-02
DTC P1760 Linear Solenoid for Line Pressure Control
Circuit Malfunction (Solenoid Valve SLT)
CIRCUIT DESCRIPTION
The throttle pressure that is applied to the primary regulator
valve (which modulates line pressure) causes the shift solenoid
Line Pressure Con- valve SLT, under electronic control, to precisely and minutely
trol Pressure
modulate and generate line pressure according to the accelera-
tor pedal effort, or engine power output detected.
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, gener-
ating 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
(a) or (b) condition below is detected 1 second or more. S Open or short in shift solenoid valve SLT circuit
P1760 (a) SLT- terminal: 0V S Shift solenoid valve SLT
(b) SLT- terminal: 12V S ECM
HINT:
Refer to the chart for the wave form between terminals SLT+
5 V/ Div. and SLT- during engine idling.
GND
1 msec./Div. D01875
2002 ECHO (RM884U)
Author : Date : 356
DI-187
DIAGNOSTICS - AUTOMATIC TRANSAXLE
WIRING DIAGRAM
Transaxle ECM
3 1
G W-L
E1 E5 SLT+
Shift Solenoid
Valve SLT
8 7
GR W -
E1 E5 SLT
D07915
2002 ECHO (RM884U)
Author : Date : 357
DI-188
DIAGNOSTICS - AUTOMATIC TRANSAXLE
INSPECTION PROCEDURE
1 Check shift solenoid valve SLT.
PREPARATION:
1 2
(a) Jack up the vehicle.
(b) Remove the oil pan.
(c) Disconnect the solenoid connector.
Check solenoid resistance:
CHECK:
Measure resistance between terminals 1 and 2 of solenoid con-
nector.
D03445 OK:
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