Toyota Sienna Service Manual: Compressor Solenoid Circuit
DESCRIPTION
In this circuit, the compressor receives a refrigerant compression demand signal from the A/C amplifier.
Based on this signal, the compressor changes the amount of compressor output.
WIRING DIAGRAM
INSPECTION PROCEDURE
1 INSPECT A/C COMPRESSOR
(a) Disconnect the A/C compressor connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance
2 CHECK HARNESS AND CONNECTOR (A/C COMPRESSOR - BODY GROUND)
(a) Disconnect the A/C compressor connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance 
3 CHECK HARNESS AND CONNECTOR (A/C COMPRESSOR - A/C AMPLIFIER)
(a) Disconnect the A/C compressor connector.
(b) Disconnect the A/C amplifier connector.
(c) Measure the resistance according to the value(s) in the table below
Standard resistance 
Result 
REPAIR OR REPLACE HARNESS OR CONNECTOR
Rear Air Outlet Damper Control Servo Motor Circuit
DESCRIPTION
This circuit turns the servo motor and changes each damper position by
receiving the signals from the A/
C amplifier.
The rear air outlet damper servo motor switches the air outlet ...
Multiplex Communication Circuit
DESCRIPTION
INSPECTION PROCEDURE
1 GO TO CAN COMMUNICATION SYSTEM
(a) Refer to the CAN communication system (See page CA-
7).
(b) If the CAN communication system is operating normally,
procee ...
Other materials:
On-vehicle inspection
1. CHECK POWER REAR NO. 2 SEAT with STOWING FUNCTION
Check the basic functions.
Operate the fold seat switch and power rear
No.2 seat switch and check to make sure each
seat function works:
Folding-down operation
Stowing operation
Return operation
...
Terminals of ECU
1. POSITION CONTROL ECU AND SWITCH ASSEMBLY
(POWER SEAT CONTROL SWITCH AND ECU)
Disconnect the P58 and P59 connectors.
Check the voltage of each terminal of the wire
harness side connectors.
If the result is not as specified, there may be a
malfunction in the wire harn ...
Knock Sensor 1 Circuit Low Input
DESCRIPTION
A flat type knock sensor (non-resonant type) has a structure that can detect
vibrations over a wide band of
frequencies: between approximately 6 kHz and 15 kHz.
Knock sensors are fitted onto the engine block to detect engine knocking.
The knock sensor contains a piezoelectr ...