Suzuki Liana RH413 Service Manual page 902

7B-63 Air Conditioning System: Automatic Type
DTC Detecting Condition and Trouble Area
• Signal from temperature control position sensor is less than the specified
(3.4 V) in operation to COOL direction after 15 seconds.
• Signal from temperature control position sensor is more than the specified
(1.6 V) in operation to HOT direction after 15 seconds.
DTC Troubleshooting
NOTE
First, perform "Temperature control actuator motor circuit inspection: Automatic Type". After that, if
DTC 1513 is still detected, perform "Temperature control actuator position sensor circuit inspection:
Automatic Type".
Temperature control actuator motor circuit inspection
Step
1 1) Check if there is any obstruction in operating range of
actuator linkage and if actuator linkage operates
smoothly.
Is there any obstruction? Does actuator linkage operate
smoothly?
2 1) Turn ignition switch OFF, and then disconnect
temperature control actuator connector referring to
"Temperature Control Actuator Removal and Installation
in Section 7A".
2) Turn ignition switch ON, and then check voltage
between "GRY/BLU" wire terminal at temperature control
actuator connector and body ground.
Is voltage about 12 V?
3 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/BLU" wire terminal at
temperature control actuator connector and "GRY/BLU"
wire terminal at HVAC control module connector.
Is resistance less than 1 M
4 1) Check resistance between "GRY/BLU" wire terminal and
body ground.
Is resistance more than 1 M
5 1) With ignition switch ON position, check voltage between
"GRY/BLU" wire terminal and "GRY" wire terminal at
temperature control actuator connector.
Is voltage about 12 V?
DTC Detecting Condition
Action
Ω
?
Ω
?
Trouble Area
• "GRY/BLU", "GRY", "RED/WHT",
"WHT" and/or "BLK/RED" wire faulty
• Linkage faulty
• Heater and cooling unit faulty
• Temperature control actuator faulty
• HVAC control module faulty
Yes
Obstruction in operating
range of actuator
linkage, actuator linkage
faulty, and/or internal
fault of heater and
cooling unit.
Go to Step 5.
Go to Step 4.
Poor connection of
"GRY/BLU" wire
terminal at HVAC
control module
connector, and/or HVAC
control module faulty.
Go to Step 6.
No
Go to Step 2.
Go to Step 3.
"GRY/BLU" wire open or
high resistance.
"GRY/BLU" wire shorted
to ground.
"GRY" wire open, poor
connection of "GRY"
wire terminal at HVAC
control module
connector, and/or HVAC
control module faulty.