Toyota Sienna Service Manual: Pressure Control Solenoid "D" Electrical (Shift Solenoid Valve SLT)
DESCRIPTION
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(%)
MONITOR DESCRIPTION
When an open or short in the linear solenoid valve (SLT) circuit is detected, the ECM interprets this as a fault. The ECM will turn on the MIL and store the DTC.
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
TYPICAL MALFUNCTION THRESHOLDS
COMPONENT OPERATING RANGE
WIRING DIAGRAM
INSPECTION PROCEDURE
1 INSPECT TRANSMISSION WIRE (SLT)
(a) Disconnect the transmission wire connector from the transaxle.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance (Check for short)
2 CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM)
(a) Connect the transmission wire connector to the transaxle.
(b) Disconnect the ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance
(d) Measure the resistance according to the value(s) in the table below.
Standard resistance (Check for short)
REPLACE ECM
3 INSPECT SHIFT SOLENOID VALVE SLT
(a) Remove the shift solenoid valve (SLT).
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance
(c) Connect the positive (+) lead with a 21 W bulb to terminal 2 and the negative (-) lead to terminal 1 of the solenoid valve connector, then check the movement of the valve.
OK: The solenoid makes an operating sound.
REPAIR OR REPLACE TRANSMISSION WIRE
Pressure Control Solenoid "D" Performance (Shift
Solenoid Valve SLT)
SYSTEM DESCRIPTION
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 spee ...
Torque Converter Clutch Solenoid Circuit
DESCRIPTION
The shift solenoid valve DSL is turned "ON" and "OFF" by signals from the ECM
in order to control the
hydraulic pressure operation, the lock-up relay valve, whi ...
Other materials:
Disassembly
1. INSPECT PACK CLEARANCE OF REVERSE CLUTCH
HINT:
(See page AX-249)
2. INSPECT PACK CLEARANCE OF DIRECT CLUTCH
AND OVERDRIVE CLUTCH
HINT:
(See page AX-249)
3. REMOVE DIRECT MULTIPLE DISC CLUTCH DISC
(a) Using a screwdriver, remove the snap ring from the
intermediate shaft.
(b) Remo ...
Evaporative Emission Control System Leak Detected
DTC SUMMARY
DESCRIPTION
The circuit description can be found in the EVAP (Evaporative Emission)
System (See page ES-409).
INSPECTION PROCEDURE
Refer to the EVAP System (See page ES-412).
MONITOR DESCRIPTION
5 hours*1 after the ignition switch is turned off, the electric vacuum pump
c ...
Diagnosis system
1. CHECK DLC3
The ECU uses ISO 15765-4 for communication.
The terminal arrangement of the DLC3 complies
with SAE J1962 and meets the ISO 15765-4 format.
NOTICE:
*: Before measuring the resistance, leave the
vehicle as is for at least 1 minute and do not
operate the ignition s ...
