Dtc B1512: Air Flow Control Actuator (Position Sensor) And/Or Its Circuit Malfunction - Suzuki SX4 Service Manual
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Also See for SX4:
- Owner's manual (47 pages) ,
- Owner's manual (278 pages) ,
- Owner's manual (16 pages)
Table of Contents
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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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Troubleshooting
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Do you have a question about the SX4 and is the answer not in the manual?
Questions and answers
Adjust throttle motor
The idle speed on a Suzuki SX4 should be controlled by the Idle Air Control Valve (IACV) rather than adjusting the idle screw on the throttle body, as the screw is factory set. Before using compressed air in the idle-air-bypass passages, the IACV should be removed to prevent damage to its delicate mechanism. If there is an issue with idle speed, checking the IACV function and referring to the SX4 service manual is recommended.
This answer is automatically generated
I have an issue of crank but not starting When I scan it brought this codeU0100 Which means no communication thou crank sensor wire was cut off but it was fix back What could be wrong and what could be the solution,
increasing revs when changing gears
The Suzuki SX4 may have increasing revs when changing gears due to its drive-by-wire system and the difference in final drive ratios between the manual (4.41) and automatic (2.81) transmissions. This difference causes high cruising RPMs in the manual version and sluggishness in the automatic. Additionally, if the revs climb while going uphill, it may be due to the transmission downshifting or kicking out of overdrive. Other possible causes include low transmission fluid, abuse, or a faulty transmission design.
This answer is automatically generated
My heater stopped working the blower **** is good, control unit ?
Possible issues with the heater in a Suzuki SX4 if the blower is working but the heater is not include:
1. Incorrect Temperature Output
- Temperature control cable broken or bent (non-A/C and manual A/C) → Check the temperature control cable.
- Temperature selector faulty (non-A/C and manual A/C) → Check the temperature selector.
- Incorrect installation of the temperature control cable (non-A/C and manual A/C) → Check and adjust the position as necessary.
- Temperature control door assembly broken → Repair the temperature control door assembly.
- Air ducts clogged → Repair air ducts.
- Heater core leaked or clogged → Replace the heater core.
- Heater hoses leaked or clogged → Replace heater hoses.
- Thermostat faulty → Check the thermostat.
- Temperature control actuator faulty (auto A/C) → Check the temperature control actuator.
- HVAC control module faulty (auto A/C) → Check the HVAC control module.
- Wiring or grounding faulty (auto A/C) → Repair as necessary.
2. Other Possible Causes
- Air flow control cable broken or bent → Check the air flow control cable.
Checking and addressing these components should help identify and resolve the heater issue.
This answer is automatically generated