Suzuki Liana RH413 Service Manual page 905

Step
4 1) Check resistance between "GRY/RED" wire terminal and
body ground.
Is resistance more than 1 M
5 1) With ignition switch ON position, check voltage between
"GRY/RED" wire terminal and "GRY/BLK" wire terminal
at air flow control actuator connector.
Is voltage about 12 V?
6 1) Turn ignition switch OFF, and then disconnect HVAC
control module connector referring to "HVAC Control
Module Removal and Installation in Section 7A".
2) Check resistance between "GRY/BLK" wire terminal and
body ground.
Is resistance more than 1 M
Air flow control actuator position sensor circuit inspection
Step
1 1) Turn ignition switch OFF, and then disconnect air flow
control actuator referring to "Air Flow Control Actuator
Removal and Installation in Section 7A".
2) Turn ignition switch ON, and then check voltage
between "RED/WHT" wire terminal at temperature
control actuator connector and body ground.
Is voltage about 5 V?
2 1) Turn ignition switch OFF, and then disconnect HVAC
control module connector referring to "HVAC Control
Module Removal and Installation in Section 7A".
2) Check resistance between "RED/WHT" wire terminal at
air flow control actuator connector and "RED/WHT" wire
terminal at HVAC control module connector.
Is resistance less than 1 M
3 1) With ignition switch ON position and HVAC control
module connector connected, check voltage between
"RED/WHT" wire terminal and "BLK/RED" wire terminal
at air flow control actuator connector.
Is voltage about 5 V?
4 1) With ignition switch ON position, check voltage between
"WHT/BLU" wire terminal and "BLK/RED" wire terminal
at air flow control actuator connector.
Is voltage about 2.5 V?
5 1) Turn ignition switch OFF, disconnect HVAC control
module connector.
2) Check resistance between "WHT/BLU" wire terminal at
air flow control actuator connector and "WHT/BLU" wire
terminal at HVAC control module connector.
Is resistance less than 1 M
Action
Ω
?
Ω
?
Action
Ω
?
Ω
?
Air Conditioning System: Automatic Type 7B-66
Yes
Poor connection of
"GRY/RED" wire
terminal at HVAC
control module
connector, and/or HVAC
control module faulty.
Go to Step 6.
Poor connection of
"GRY/BLK" wire
terminal at HVAC
control module
connector, and/or HVAC
control module faulty.
Yes
Go to Step 3.
Go to Step 3.
Go to Step 4.
Go to Step 6.
Go to Step 6.
No
"GRY/RED" wire
shorted to ground.
"GRY/BLK" wire open,
poor connection of
"GRY/BLK" wire
terminal at HVAC
control module
connector, and/or HVAC
control module faulty.
"GRY" wire shorted to
ground.
No
Go to Step 2.
"RED/WHT" wire open
or high resistance, poor
connection of "RED/
WHT" wire terminal at
HVAC control module
connector, and/or HVAC
control module faulty.
"BLK/RED" wire open or
high resistance, poor
connection of "BLK/
RED" wire terminal at
HVAC control module
connector, and/or HVAC
control module faulty.
Go to Step 5.
"WHT/BLU" wire open
or high resistance, poor
connection of "WHT/
BLU" wire terminal at
HVAC control module
connector, and/or HVAC
control module faulty.