Suzuki Liana RH413, Service Manual

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7B-63 Air Conditioning System: Automatic Type
DTC Detecting Condition and Trouble Area
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
DTC Detecting Condition 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.
• “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
Step Action Yes No
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?
Obstruction in operating
range of actuator
linkage, actuator linkage
faulty, and/or internal
fault of heater and
cooling unit. Go to Step 2.
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?
Go to Step 5. Go to Step 3.
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
Ω
?
Go to Step 4. “GRY/BLU” wire open or
high resistance.
4 1) Check resistance between “GRY/BLU” wire terminal and
body ground.
Is resistance more than 1 M
Ω
?
Poor connection of
“GRY/BLU” wire
terminal at HVAC
control module
connector, and/or HVAC
control module faulty. “GRY/BLU” wire shorted
to ground.
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?
Go to Step 6. “GRY” wire open, poor
connection of “GRY”
wire terminal at HVAC
control module
connector, and/or HVAC
control module faulty.