Toyota Sienna Service Manual: 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 operation are transmitted between the A/C amplifier and rear A/C control assembly.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 CHECK HARNESS AND CONNECTOR (REAR A/C CONTROL ASSEMBLY - BATTERY)
(a) Disconnect the connector from the rear A/C control assembly.
(b) Measure the voltage according to the value(s) in the table below.
Standard voltage
2 CHECK HARNESS AND CONNECTOR (REAR A/C CONTROL ASSEMBLY - BODY GROUND)
(a) Measure the resistance according to the value(s) in the table below.
Standard resistance 
3 CHECK HARNESS AND CONNECTOR (REAR A/C CONTROL ASSEMBLY - A/C AMPLIFIER)
(a) Disconnect the connector from the A/C amplifier.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
Air Conditioning Compressor Magnetic Clutch Circuit
DESCRIPTION
When the A/C amplifier is turned on, a magnetic clutch ON signal is sent from
the MGC terminal of the A/
C amplifier. Then, the MG CLT relay turns on to operate the magnetic clutch.
W ...
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)
...
Other materials:
Front Occupant Classification Sensor LH Collision
Detection
DTC B1785 Front Occupant Classification Sensor LH Collision
Detection
DESCRIPTION
DTC B1785 is output when the occupant classification ECU receives a collision
detection signal sent by
the front occupant classification sensor LH if an accident occurs.
DTC B1785 is also output when the front ...
Moving a second seat for third seat access
Getting in the vehicle
Tip-up seats
Pull the seatback angle adjustment
lever and fold down the
seatback. The cushion will tip
up. The seat can slide forward.
Move the seat to the frontmost
position.
Ottoman seats
Pull the seatback angle adjustment
lever and fold down th ...
A/F Sensor Circuit Slow Response
DTC P2A00 A/F Sensor Circuit Slow Response (Bank 1
Sensor 1)
DTC P2A03 A/F Sensor Circuit Slow Response (Bank 2
Sensor 1)
HINT:
DTC P2A00 indicates malfunctions related to the bank 1 A/F sensor.
DTC P2A03 indicates malfunctions related to the bank 2 A/F sensor.
Bank 1 r ...
