Toyota Sienna Service Manual: ECU Power Source Circuit
DESCRIPTION
This circuit provides power to operate the theft deterrent (warning) ECU.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 INSPECT FUSE (ECU-B)
- Remove the ECU-B fuse from the engine room J/B.
- Measure the resistance.
Standard resistance: Below 1 Ω
2 CHECK INSTRUMENT PANEL J/B ASSEMBLY (POWER SOURCE)
- Disconnect the 1C J/B connector.
- Measure the voltage according to the value(s) in the table below.
Standard voltage
3 CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL J/B ASSEMBLY - BODY GROUND)
- Disconnect the 1K and 1L J/B connector.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
REPLACE INSTRUMENT PANEL J/B ASSEMBLY
Security Indicator Light Circuit
DESCRIPTION
Even when the theft deterrent system is in the disarmed state, the security
indicator blinks due to a signal
output from the immobiliser system. The security indicator blinks continuou ...
Engine hood courtesy
switch
Inspection
1. INSPECT ENGINE HOOD COURTESY SWITCH
Measure the resistance according to the value(s) in
the table below.
Standard resistance
If the result is not as specified, r ...
Other materials:
Disposal
1. DISPOSE OF SHOCK ABSORBER ASSEMBLY REAR LH
(a) Fully extend the shock absorber rod.
(b) Using a drill, make a hole in the cylinder as shown in
the illustration to discharge the gas inside the
cylinder.
CAUTION:
When drilling, since the fragments may fly
out, work careful ...
Locking and unlocking the back door
Entry function (vehicles with a smart key system)
Carry the electronic key to enable this function.
Press the unlock button to
unlock all the doors.
The door cannot be unlocked for
3 seconds after the door is
locked.
Lock the back door again when
you leave the vehicle. The back
...
Installation
1. INSTALL REAR DRIVE SHAFT ASSEMBLY LH
(a) Install the drive shaft to the axle carrier.
NOTICE:
Be careful not to damage the boot and ABS
speed sensor rotor to the drive shaft and oil seal
of the axle hub bearing.
(b) Align the matchmarks and connect the drive shaft to
the side gear shaf ...
