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:
Basic inspection
When a malfunction is not confirmed by the DTC check,
troubleshooting should be carried out in all circuits
considered to be possible causes of the problem. In many
cases, by carrying out the basic engine check shown in the
following flowchart, the location of the problem can be found
quickly a ...
Hood
COMPONENTS
Adjustment
HINT:
Since a centering bolt is used as a hood hinge mounting bolt
and hood lock mounting bolt, the hood and hood lock can not
be adjusted with them on. Substitute a bolt with a washer for
the centering bolt.
1. INSPECT HOOD SUB-ASSEMBLY
Check that the clearance is ...
A/F Sensor Circuit Slow Response
DTC P2A00 A/F Sensor Circuit Slow Response (Bank 1
Sensor 1)
DTC P2A03 A/F Sensor Circuit Slow Response (Bank 2
Sensor 1)
HINT:
DTC P2A00 indicates malfunctions related to the bank 1 A/F sensor.
DTC P2A03 indicates malfunctions related to the bank 2 A/F sensor.
Bank 1 r ...
