Dtc B1512 (No.12): Air Flow Control Actuator (Position Sensor) And/Or Its Circuit Malfunction - Suzuki Liana RH413 Service Manual

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7B-61 Air Conditioning System: Automatic Type
Step
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
7
1) Check resistance between "WHT" wire terminal and
body ground.
Is resistance more than 1 M
8
1) Check temperature control actuator referring to
"Temperature Control Actuator Inspection in Section 7A".
Is temperature control actuator normal?

DTC B1512 (No.12): Air Flow Control Actuator (Position Sensor) and/or its Circuit malfunction

Wiring Diagram
2
1. HVAC control module
DTC Detecting Condition and 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).
DTC Troubleshooting
Step
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?
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
Action
?
?
5V
RED/WHT
G77-26
WHT/BLU
G77-12
BLK/RED
G77-9
2. Air flow control actuator
DTC Detecting Condition
Action
?
Go to Step 7.
Poor connection of
"WHT" wire terminal at
HVAC control module
connector, and/or HVAC
control module faulty.
HVAC control module
faulty.
1
5V
12
3. HVAC control module connector "G77" (viewed from harness side)
Go to Step 4.
Go to Step 3.
Yes
"WHT" wire open or
high resistance.
"WHT" wire shorted to
ground.
Temperature control
actuator faulty.
3
9
26
Trouble Area
• "RED/WHT", "WHT/BLU" and/or
"BLK/RED" wire faulty
• Air flow control actuator faulty
• HVAC control module faulty
Yes
Go to Step 2.
"RED/WHT" wire open.
No
S3RH0A7224017
I3RH0A722014-01
No

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