Toyota Sienna Service Manual: Rear Air Conditioning Relay Circuit
DESCRIPTION
The RR A/C relay is switched on by signals from the A/C amplifier. It supplies power to the rear blower motor.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 INSPECT RELAY (RR A/C)
(a) Remove the RR A/C relay from the No. 3 relay block.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance 
2 CHECK HARNESS AND CONNECTOR (A/C AMPLIFIER - BATTERY)
(a) Disconnect the connector from the A/C amplifier.
(b) Measure the voltage according to the value(s) in the table below.
Standard voltage
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
Rear Air Conditioning Control Panel Circuit
DESCRIPTION
This is the rear A/C system control signal circuit as well as the power
supply circuit of the rear A/C control
assembly.
Pulse signals regarding rear A/C control panel switch operat ...
Rear Blower Motor Circuit
DESCRIPTION
Power to the rear blower motor is supplied from the battery via the RR A/C
relay.
The rear blower motor speed level varies between 0 and 31 based on the voltage
difference measured ...
Other materials:
Inspection
1. INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY OPERATION
(a) Apply the parking brake and turn the ignition switch
to the ON position.
(b) Depress the brake pedal and check that the engine
starts only when the shift lever is in the N or P
position and the engine does not start when the shift ...
Voice Guidance does not Function
INSPECTION PROCEDURE
1 CHECK NAVIGATION SYSTEM SETTING
Enter the "Menu" screen by pressing the "MENU" switch.
Select "Volume".
Check that "OFF" is not selected.
OK:
"OFF" is not selected
2 CHECK NAVIGATION SETTING
...
Door pockets
Front
Rear
NOTICE
Rear: Make sure magazines are not bent
or protruding from the sliding door pockets.
Do not insert anything too big so that
the shape of the sliding door pockets is
distorted. Such objects may obstruct the
opening/closing of the sliding ...
