Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2012 Suzuki SX4 BaseFACTORY OEM SERVICE PROCEDURE
Air Conditioning System DTCS
AIR CONDITIONING SYSTEM DIAGNOSTIC TROUBLE CODE (DTC) LIST
| DTC | Description |
|---|---|
| B1502 | Inside Air Temperature Sensor Circuit Malfunction |
| B1503 | Evaporator Temperature Sensor Circuit Malfunction |
| B1504 | Sun Load Sensor Circuit Malfunction |
| B1511 | Temperature Control Actuator (Position Sensor) and/or Its Circuit Malfunction |
| B1512 | Air Flow Control Actuator (Position Sensor) and/or Its Circuit Malfunction |
| B1513 | Temperature Control Actuator (Motor) and/or Its Circuit Malfunction |
| B1514 | Air Flow Control Actuator (Motor) and/or Its Circuit Malfunction |
| B1541 | Back-up Power Supply Circuit Malfunction |
| B1546 | A/C Refrigerant Pressure Malfunction |
| B1551 | Serial Communication Circuit Malfunction |
| B1552 | HVAC Control Module Check Sum Error |
| B1553 | CAN Communication Circuit Malfunction |
| B1557 | VSS Signal Failure |
| B1561 | ECT Signal Failure |
| B1562 | Outside Temperature Sensor Signal Failure |
| B1563 | A/C Refrigerant Pressure Sensor Signal Failure |
| B1570 | Engine Type Signal Failure |
| B1571 | Combination Meter Spec Signal Failure |
| B1580 | EEPROM error |
Factory Service Tools
Use the Manual With the Right Hardware
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.
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