Toyota RAV4 (XA40) 2013-2018 Service Manual: Torque converter clutch solenoid circuit
Description
The shift solenoid valve dsl is turned on and off by signals from the ecm to control the hydraulic pressure acting on the lock-up relay valve, which then controls operation of the lock-up clutch.
Fail-safe function: if the ecm detects a malfunction, it turns the shift solenoid valve dsl off.
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 position selection. The ecm determines the lock-up status of the torque converter by comparing the engine rpm (ne) to the input rpm (nt). The ecm calculates the actual transmission gear by comparing the input rpm (nt) to the output rpm (sp2).
When conditions are appropriate, the ecm requests "lock-up" by applying control voltage to the shift solenoid valve dsl. When the shift solenoid valve dsl is opened, the shift solenoid valve dsl applies pressure to the lock-up relay valve and locks the torque converter clutch. If the ecm detects an open or short in the shift solenoid valve dsl circuit, the ecm interprets this as a fault in the shift solenoid valve dsl or its circuit. The ecm will illuminate the mil and store a dtc.
Monitor strategy
Typical enabling conditions
Typical malfunction thresholds
Component operating range
Wiring diagram
Refer to dtc p0741 (see page ax-62).
Inspection procedure
- Inspect transmission wire (shift solenoid valve dsl)
- Disconnect the b27 wire connector.
- Measure the resistance of the transmission wire.
Standard resistance 
- Check wire harness (transmission wire - ecm)
- Disconnect the b30 ecm connector.
- Measure the resistance of the wire harness side connector.
Standard resistance 
Replace ecm
- Inspect shift solenoid valve dsl
- Remove the shift solenoid valve dsl.
- Measure the resistance between the solenoid valve terminal and solenoid valve body.
Standard resistance:
11 to 13 
at 20°c (68°f)
- Connect the battery's positive (+) lead to the terminal of the solenoid valve connector, and the negative (-) lead to the solenoid body. Then check that the valve moves and makes an operating noise.
Ok: valve moves and makes operating noise.
Repair or replace transmission wire
Pressure control solenoid "d" electrical (shift solenoid valve slt)
Description
Refer to dtc p2714 (see page ax-91).
Monitor description
When an open or short in the shift solenoid valve slt circuit is detected,
the ecm interprets this as a fault.
The ...
Automatic transaxle fluid
On-vehicle inspection
Check transaxle fluid level
Hint:
Drive the vehicle so that the engine and transaxle are at
normal operating temperature.
Fluid temperature:
70 to 80°c (158 to 176°f ...
Other materials:
Engine (ignition) switch
(vehicles with a
smart key system)
Performing the following operations when carrying the electronic
key on your person starts the engine or changes engine
switch modes.
Starting the engine
Check that the parking brake is set.
Check that the shift lever is set in p.
Firmly depress the brake pedal.
The smart key system in ...
Short in can bus lines
Description
There may be a short circuit between the can bus lines when the resistance
between terminals 6 (canh)
and 14 (canl) of the dlc3 is below 54
.
Wiring diagram
Inspection procedure
Notice:
Turn the ignition switch off before measuring the resistances of the
main ...
Removal
(2006/01- )
Remove front wheel
Drain automatic transaxle fluid
Drain the automatic transaxle fluid for u140f (see
page ax-147).
Drain the automatic transaxle fluid for u241e (see
page ax-146).
Drain the automatic transaxle fluid for u151e (see
page ax-172).
Remove front axle hub nut ( ...
