Toyota Sienna Service Manual: 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, which then controls
operation of the lock-up clutch.
MONITOR DESCRIPTION
Torque converter lock-up is controlled by the ECM based on engine rpm, engine load, engine temperature, vehicle speed, transmission temperature, and shift range selection. The ECM determines the lock-up status of the torque converter by comparing the engine rpm (NE) to the input turbine rpm (NT).
The ECM calculates the actual transmission gear by comparing input turbine rpm (NT) to counter gear rpm (NC). When conditions are appropriate, the ECM requests "lock-up" by applying control voltage to the shift solenoid DSL. When the DSL is opened, it applies pressure to the lock-up relay valve and locks the torque converter clutch. If the ECM detects an open or short in the DSL solenoid circuit, the ECM interprets this as a fault in the DSL solenoid or circuit. 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 (DSL)
(a) Disconnect the transmission wire connector from the transaxle.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance
2 CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM)
(a) Connect the transmission wire connector.
(b) Disconnect the ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance
REPLACE ECM
3 INSPECT SHIFT SOLENOID VALVE DSL
(a) Remove the shift solenoid valve DSL.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance
(c) Connect the positive (+) lead to the terminal of the solenoid connector, and the negative (-) lead to the solenoid body.
OK: The solenoid valve makes an operating sound.
REPAIR OR REPLACE TRANSMISSION WIRE
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 senso ...
Other materials:
Problem symptoms table
HINT:
Use the table below to help determine the cause of the
problem symptom. The likely causes of the problem are
indicated in descending order. Check each suspected area
in order. Repair or replace faulty parts or perform
adjustments as necessary.
Inspect the fuse and rel ...
Personal/interior
lights
Front
Turns the light on/off
Rear
Turns the light on/off
When the personal/interior light main switch is in the off position, the
rear personal lights will not turn on even if the switch is on.
Type A
Type B
...
Adjustment
HINT:
On the RH side, use the same procedures as on the LH
side.
Since a centering bolt is used as a door hinge mounting
bolt on the body side and the door side, the door can not
be adjusted with it on. Substitute a bolt with a washer for
the centering bolt.
1. INSPECT FRONT DOOR PA ...
