Suzuki Liana RH413, Service Manual

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7B-61 Air Conditioning System: Automatic Type
DTC B1512 (No.12): Air Flow Control Actuator (Position Sensor) and/or its Circuit malfunction
S3RH0A7224017
Wiring Diagram
DTC Detecting Condition and Trouble Area
DTC Troubleshooting
6 1) Turn ignition switch OFF, disconnect HVAC control
module connector referring to “HVAC Control Module
Removal and Installation in Section 7A”.
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 7. “WHT” wire open or
high resistance.
7 1) Check resistance between “WHT” wire terminal and
body ground.
Is resistance more than 1 M
Ω
?
Poor connection of
“WHT” wire terminal at
HVAC control module
connector, and/or HVAC
control module faulty. “WHT” wire shorted to
ground.
8 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.
Step Action Yes No
5V
5V
RED/WHT
WHT/BLU
BLK/RED
G77-9
G77-12
G77-26
2
1
3
9 12
26
I3RH0A722014-01
1. HVAC control module 2. Air flow control actuator 3. HVAC control module connector “G77” (viewed from harness side)
DTC Detecting Condition Trouble Area
Signal from air flow control position sensor is less than the specified (0.0 V)
or more than the specified (5.0 V). • “RED/WHT”, “WHT/BLU” and/or
“BLK/RED” wire faulty
• Air flow control actuator faulty
• HVAC control module faulty
Step Action Yes No
1 1) Turn ignition switch OFF, and then disconnect air flow
control actuator connector 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 air flow control
actuator connector and body ground.
Is voltage about 5 V?
Go to Step 4. 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
air flow 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.