Toyota Sienna Service Manual: Pressure Control Solenoid "B" Electrical (Shift Solenoid Valve SL2)
DESCRIPTION
Shifting from 1st to 5th is performed in combination with "ON" and "OFF"
operation of the shift solenoid
valves SL1, SL2, SL3, S4 and SR which are controlled by the ECM. If an open or
short circuit occurs in
either of the shift solenoid valves, the ECM controls the remaining normal shift
solenoid valves to allow
the vehicle to be operated smoothly (Fail safe function).
MONITOR DESCRIPTION
The ECM commands gear shifts by turning the shift solenoid valves "ON/OFF". When there is an open or short circuit in any shift solenoid valve circuit, the ECM detects the problem and illuminates the MIL and stores the DTC. And the ECM performs the fail-safe function and turns the other normal shift solenoid valves "ON/OFF" (In case of an open or short circuit, the ECM stops sending current to the circuit.) (See page AX-30).
MONITOR STRATEGY
TYPICAL ENABLING CONDITIONS
TYPICAL MALFUNCTION THRESHOLDS
COMPONENT OPERATING RANGE
WIRING DIAGRAM
INSPECTION PROCEDURE
1 INSPECT TRANSMISSION WIRE (SL2)
(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.
OK:
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 connector from the ECM.
(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.
OK:
Standard resistance (Check for short)
REPLACE ECM
3 INSPECT SHIFT SOLENOID VALVE SL2
(a) Remove the shift solenoid valve SL2.
(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 "B" Performance (Shift
Solenoid Valve SL2)
SYSTEM DESCRIPTION
The ECM uses signals from the vehicle speed sensor to detect the actual gear
position (1st, 2nd, 3rd, 4th
or 5th gear).
Then the ECM compares the actual gear with the shi ...
Intermediate Shaft Speed Sensor "A"
DESCRIPTION
This sensor detects the rotation speed of the counter gear. By comparing the
counter gear speed signal
(NC) with the direct clutch speed sensor signal (NT), the ECM detects the shift
...
Other materials:
Installation
1. INSTALL LOWER BALL JOINT ASSEMBLY FRONT LH
(a) Install the lower ball joint assembly front LH and
tighten the nut.
Torque: 123 N*m (1,250 kgf*cm, 91 ft.*lbf)
(b) Install a new cotter pin.
NOTICE:
If the holes for the cotter pin are not aligned,
tighten the nut further up to 60°.
2. INS ...
Removal
1. REMOVE FRONT WHEEL
2. REMOVE FRONT AXLE HUB LH NUT
HINT:
(See page AH-4)
SST 09930-00010
3. SEPARATE SPEED SENSOR FRONT LH
HINT:
(See page AH-4)
4. SEPARATE FRONT DISC BRAKE CALIPER
ASSEMBLY LH
HINT:
(See page AH-4)
5. REMOVE FRONT DISC
6. SEPARATE TIE ROD ASSEMBLY LH
HINT:
(See pa ...
Trailer towing tips
Your vehicle will handle differently when towing a trailer. Help to avoid
an accident, death or serious injury, keep the following in mind when
towing:
Speed limits for towing a trailer vary by state or province. Do
not
exceed the posted towing speed limit.
Toyota recommends that the ve ...
