Suzuki 2006 SX4, Service Manual

Page: 928 / 1478

7B-63 Air Conditioning System: Automatic Type
DTC B1512: Air flow Control Actuator (Position Sensor) and/or Its Circuit Malfunction
S6RW0C7224014
Wiring Diagram
DTC Detecting Condition and Trouble Area
4 Temperature control actuator check
1) Check position sensor of temperature control actuator
for performance referring to “Temperature Control
Actuator and Its Circuit Inspection”.
Is it in good condition?
Substitute a known-
good HVAC control
module and recheck. Replace temperature
control actuator.
5 Position sensor of temperature control actuator power
supply voltage check
1) Turn ignition switch to OFF position.
2) Disconnect connector from air flow control actuator.
3) Turn ignition switch to ON position.
4) Measure voltage between.
• Position sensor power supply terminal and position
sensor ground terminal of temperature control
actuator connector
• Position sensor signal terminal and position sensor
ground terminal of temperature control actuator
connector
Is voltage 4.5 – 5.5 V?
Check air flow control
actuator and its circuit. Substitute a known-
good HVAC control
module and recheck.
Step Action Yes No
G20
1 2 3 4 5 6 7 8 9 10 11 12 13 14
15 16 17 18 19 20 21 24 23 22 25 26 27 28 29 30
BRN/YEL
BRN/WHT
5V
5V
12V
ORN
WHT G20-12
G20-28
G20-24
G20-15
G20-16
WHT/BLU
2
3
4
[P]
[G]
[S]
1
I6RW0C722005-01
[P]: Position sensor power supply circuit [G]: Position sensor ground circuit 2. Air flow control actuator 4. To other sensors
[S]: Position sensor signal circuit 1. HVAC control module 3. To temperature control actuator
DTC Detecting Condition Trouble Area
Air flow control actuator position sensor signal voltage is higher than or lower
than specified value for specified time continuously. • Air flow control actuator circuit
• Air flow control actuator
• HVAC control module