Suzuki Liana RH413, Service Manual

Page: 903 / 1302

Air Conditioning System: Automatic Type 7B-64
Temperature control actuator position sensor circuit inspection
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” wire terminal and
body ground.
Is resistance more than 1 M
Ω
?
Poor connection of
“GRY” wire terminal at
HVAC control module
connector, and/or HVAC
control module faulty. “GRY” wire shorted to
ground.
Step Action Yes No
Step Action Yes No
1 1) Turn ignition switch OFF, and then disconnect
temperature control actuator referring to “Temperature
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?
Go to Step 3. Go to Step 2.
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
temperature control actuator connector and “RED/WHT”
wire terminal at HVAC control module connector.
Is resistance less than 1 M
Ω
?
Go to Step 3. “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.
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 temperature control actuator connector.
Is voltage about 5 V?
Go to Step 4. “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.
4 1) With ignition switch ON position, check voltage between
“WHT” wire terminal and “BLK/RED” wire terminal at
temperature control actuator connector.
Is voltage about 2.5 V?
Go to Step 6. Go to Step 5.
5 1) Turn ignition switch OFF, disconnect HVAC control
module connector.
2) Check resistance between “WHT” wire terminal at
temperature control actuator connector and “WHT” wire
terminal at HVAC control module connector.
Is resistance less than 1 M
Ω
?
Go to Step 6. “WHT” wire open or
high resistance, poor
connection of “WHT”
wire terminal at HVAC
control module
connector, and/or HVAC
control module faulty.
6 1) Check temperature control actuator referring to
“Temperature Control Actuator Inspection in Section 7A”.
Is temperature control actuator normal?
HVAC control module
faulty. Temperature control
actuator faulty.