2007 TOYOTA SIENNA Service Repair Manual

Page 2785 of 3000

TOYOTA SIENNA 2007  Service Repair Manual AIR CONDITIONING  –  AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)AC–39
AC
(a) Disconnect the rear evaporator temperature sensor 
connector.
(b) Disconnect the A/C amplifier co

Page 2786 of 3000

TOYOTA SIENNA 2007  Service Repair Manual AIR CONDITIONING  –  AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)AC–43
AC
DESCRIPTION
The solar sensor, which is installed on the upper side of the instrument panel, detects s

Page 2787 of 3000

TOYOTA SIENNA 2007  Service Repair Manual AC–44AIR CONDITIONING  –  AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)
AC
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:
• If DTC B1244 is output at the same time, troubleshoot D

Page 2788 of 3000

TOYOTA SIENNA 2007  Service Repair Manual AIR CONDITIONING  –  AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)AC–45
AC
B
C
A
(a) Disconnect the solar sensor connector.
(b) Measure the voltage according to the value(s) in

Page 2789 of 3000

TOYOTA SIENNA 2007  Service Repair Manual AC–46AIR CONDITIONING  –  AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)
AC
(b) Measure the resistance according to the value(s) in the 
table below.
Standard resistance
NG
OK
(

Page 2790 of 3000

TOYOTA SIENNA 2007  Service Repair Manual AIR CONDITIONING  –  AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)AC–47
AC
(a) Disconnect the solar sensor connector.
(b) Disconnect the A/C amplifier connector.
(c) Measure th

Page 2791 of 3000

TOYOTA SIENNA 2007  Service Repair Manual AC–48AIR CONDITIONING  –  AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)
AC
SYSTEM DESCRIPTION
The ECM sends an engine speed signal to the A/C amplifier via CAN communication an

Page 2792 of 3000

TOYOTA SIENNA 2007  Service Repair Manual AIR CONDITIONING  –  AIR CONDITIONING SYSTEM (for Automatic Air Conditioning Sys-
tem)AC–49
AC
Result
B
A
(a) Use the intelligent tester to check if the multiplex 
communication system (BEAN) is f