Dtc B1520 / B1521 / B1522: Temperature / Blower Speed / Air Flow Selector Malfunction - Suzuki 2006 SX4 Service Manual

7B-68 Air Conditioning System: Automatic Type
Step
5 Wire harness check
Check position sensor circuit of temperature control actuator
for condition referring to Step 2 of "DTC B1512: Air flow
Control Actuator (Position Sensor) and/or Its Circuit
Malfunction".
Is it in good condition?
6 Air Flow control actuator check
1) Check air flow control actuator for performance referring
to "Air Flow Control Actuator and Its Circuit Inspection".
Is it in good condition?

DTC B1520 / B1521 / B1522: Temperature / Blower Speed / Air Flow Selector Malfunction

DTC Detecting Condition and Trouble Area
DTC Detecting Condition
When internal malfunction is detected in the
HVAC control module.
DTC Troubleshooting
Step
1 Was "Air Conditioning System Check" performed?
2 DTC check
1) Clear DTC referring to "DTC Clearance".
2) Recheck DTC.
Are DTC B1520, B1521 and/or B1522 still detected?
Action
• Temperature selector included in HVAC control module (DTC
B1520)
• Blower speed selector included in HVAC control module (DTC
B1521)
• Air flow selector included in HVAC control module (DTC B1522)
Action
Yes
Go to Step 6.
Substitute a known-
good HVAC control
module and recheck.
Trouble Area
Yes
Go to Step 2.
Substitute a known
good HVAC control
module and recheck.
No
Repair or replace.
Replace air flow control
actuator.
S6RW0D7224017
No
Go to "Air Conditioning
System Check".
Intermittent trouble.
Check for intermittent
referring to "Intermittent
and Poor Connection
Inspection in Section
00".