Toyota Sienna Service Manual: Air conditioning system (for manual air conditioning system)
Back-up Power Source Circuit
DESCRIPTION
This is the back-up power source for the A/C amplifier. Power is supplied
even when the ignition switch is
off and is used for diagnostic trouble code memory, etc.
WIRING DIAGRAM
...
Precaution
NOTICE:
Because the compressor operates at high voltages, wear
electric insulated gloves and pull out the service plug to
cut the high-voltage circuit before inspection.
1. DO NOT HANDLE REFRIGERA ...
Other materials:
Checking tires
Check if the treadwear indicators are showing on the tires. Also check
the tires for uneven wear, such as excessive wear on one side of the
tread. Check the spare tire condition and pressure if not rotated.
New tread
Worn tread
Treadwear indicator
The location of treadwear indicator ...
How to proceed with
troubleshooting
HINT:
Use this procedure to troubleshoot the theft deterrent
system.
The intelligent tester should be used in step 2.
1 VEHICLE BROUGHT TO WORKSHOP
2 CUSTOMER PROBLEM ANALYSIS
Interview the customer to confirm the trouble
3 INSPECT COMMUNICATION FUNCTION OF MULTIPLEX COMMUNI ...
Power back door warning buzzer
INSPECTION
1. POWER BACK DOOR WARNING BUZZER
Check the resistance of the buzzer.
Resistance
If the result is not as specified, replace the buzzer.
NOTICE:
The circuit that causes the buzzer to sounds
is built into the back door ECU, not around
the buzzer.
Directly applying ...
