Toyota Sienna Service Manual: 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 continuously due to a continuous signal received from the immobiliser system while in the armed state.
The multiplex network body ECU causes the security indicator to light up or blink only during the arming preparation state and alarm sounding states.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 INSPECT COMBINATION METER ASSEMBLY
- Remove the combination meter assembly.
- Apply battery voltage between the terminals of the indicator, and check the lighting condition of the security indicator.
Standard
NOTICE:
- If the positive (+) lead and the negative (-) lead are incorrectly connected, the security indicator will not light up.
- Voltage of more than 12 V will damage the security indicator
- If the voltage is too low, the security indicator will not light up.
2 CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - MULTIPLEX NETWORK BODY ECU)
- Disconnect the B6 ECU connector.
- Disconnect the C10 meter connector.
- Measure the resistance according to the value(s) in the table below.
Standard resistance
3 CHECK HARNESS AND CONNECTOR (COMBINATION METER - BODY GROUND)
- Measure the resistance according to the value(s) in the table below.
Standard resistance
REPLACE MULTIPLEX NETWORK BODY ECU
Ignition Switch Circuit
DESCRIPTION
When the ignition switch is turned to the ON position, battery positive
voltage is applied to terminal IG of
the ECU. When battery positive voltage is applied to terminal IG of the ECU ...
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 ...
Other materials:
Cup holders
Front
Press in and release the front cup
holder.
Console box type A
(if equipped)
Console box type B
(if equipped)
Pull the lid down.
Console box type C
(if equipped)
Second seat (if equipped)
Removing the second center seat.
Rear
...
Panel Switches do not Function
INSPECTION PROCEDURE
1 CHECK PANEL SWITCH
Check for foreign matter around the switches that might
prevent operation.
OK:
No foreign matter is found
2 CHECK PANEL SWITCH (DISPLAY CHECK MODE)
Enter the "Display Check" mode (Panel Switch Check).
Operate the abnorma ...
Master cylinder pressure sensor check (when using intelligent tester)
(a) Leave the vehicle in a stationary condition and
release the brake pedal for 1 second or more, and
quickly depress the brake pedal with a force of 98 N
(10 kgf, 22 lbf) or more for 1 second or more.
(b) Check the ABS warning light stays on for 3
seconds
HINT:
Ensure that the ABS warni ...
