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Dtc B1512: Air Flow Control Actuator (Position Sensor) And/Or Its Circuit Malfunction - Suzuki SX4 Service Manual

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Step
3
Position sensor of temperature control actuator power
supply voltage check
1) Connect connector to HVAC control module.
2) Turn ignition switch to ON position.
3) 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?
4
Temperature control actuator check
1) Check position sensor of temperature control actuator
for performance referring to "Temperature Control
Actuator and Its Circuit Inspection: Automatic Type".
Is it in good condition?
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?

DTC B1512: Air flow Control Actuator (Position Sensor) and/or Its Circuit Malfunction

Wiring Diagram
2
BRN/YEL
BRN/WHT
3
[P]
[S]
WHT/BLU
[G]
4
[P]: Position sensor power supply circuit
[S]: Position sensor signal circuit
DTC Detecting Condition and Trouble Area
Air flow control actuator position sensor signal voltage is higher than or lower
than specified value for specified time continuously.
Action
1
12V
G20-15
G20-16
5V
5V
WHT
G20-12
G20-28
ORN
G20-24
[G]: Position sensor ground circuit
1. HVAC control module
DTC Detecting Condition
Air Conditioning System: Automatic Type 7B-61
Go to Step 4.
Substitute a known-
good HVAC control
module and recheck.
Check air flow control
actuator and its circuit.
14
13
12
11
10
9
8
30
29
28
27
26
25
24
2. Air flow control actuator
3. To temperature control actuator
Yes
Go to Step 5.
Replace temperature
control actuator.
Substitute a known-
good HVAC control
module and recheck.
G20
7
6
5
4
3
23
22
21
20
19
18
17
4. To other sensors
Trouble Area
• Air flow control actuator circuit
• Air flow control actuator
• HVAC control module
No
S7RW0A7224014
2
1
16
15
I6RW0C722005-01

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