DTC Table
Precautions: Precautions for Diagnosing Trouble · General safety (00)
NOTE:
•Perform Air Conditioning System Check:Automatic Type before starting DTC troubleshooting.
•DTC B1536 and B1537 are ECM-related DTCs. For these DTCs, refer to DTC Table (Additional Heater System):Non-A/C.
•DTC B1536 and B1537 are ECM-related DTCs. For these DTCs, refer to DTC Table (Additional Heater System):Non-A/C.
| DTC | DTC name | DTC detecting condition | “AUTO” indicator |
|---|---|---|---|
| Display SUZUKI scan tool | |||
B1502-H 
|
Inside Air Temperature Sensor and/or Its Circuit Malfunction | Signal voltage of position sensor in inside air temperature sensor is higher than specified value (4.9 V) for specified time continuously. | Blinking |
| B1502-L
|
Signal voltage of position sensor in inside air temperature sensor is lower than specified value (0.1 V) for specified time continuously. | Blinking | |
| B1503
|
Evaporator Temperature Sensor and/or Its Circuit Malfunction | HVAC control module receives invalid data of evaporator temperature sensor from BCM continuously through CAN communication line. | Blinking |
| B1504-H
|
Sunload Sensor and/or Its Circuit Malfunction | Signal voltage of position sensor in sunload sensor is higher than specified value (4.9 V) for specified time continuously. | Off |
| B1504-L
|
Signal voltage of position sensor in sunload sensor is lower than specified value (0.1 V) for specified time continuously. | Blinking | |
| B1511-H
|
Temperature Control Actuator (Position Sensor) and/or Its Circuit Malfunction | Signal voltage of position sensor in temperature control actuator is higher than specified value (4.8 V) for specified time continuously. | Blinking |
| B1511-L
|
Signal voltage of position sensor in temperature control actuator is lower than specified value (0.1 V) for specified time continuously. | Blinking | |
| B1512-H
|
Air Flow Control Actuator (Position Sensor) and/or Its Circuit Malfunction | Signal voltage of position sensor in air flow control actuator is higher than specified value (4.8 V) for specified time continuously. | Blinking |
| B1512-L
|
Signal voltage of position sensor in air flow control actuator is lower than specified value (0.1 V) for specified time continuously. | Blinking | |
| B1513
|
Temperature Control Actuator and/or Its Circuit Malfunction | Difference between target opening and actual opening is more than specified value even though temperature control actuator has operated for specified time. | Blinking |
| B1514
|
Air Flow Control Actuator and/or Its Circuit Malfunction | Difference between target opening and actual opening is more than specified value even though air flow control actuator has operated for specified time. | Blinking |
| B1530-H
|
Air Intake Control Actuator (Position Sensor) and/or Its Circuit Malfunction | Signal voltage of position sensor in air intake control actuator is higher than specified value (4.8 V) for specified time continuously. | Blinking |
| B1530-L
|
Signal voltage of position sensor in air intake control actuator is lower than specified value (0.1 V) for specified time continuously. | Blinking | |
| B1531
|
Air Intake Control Actuator and/or Its Circuit Malfunction | Difference between target opening and actual opening is more than specified value even though air intake control actuator has operated for specified time. | Blinking |
| B1541
|
Backup Power Supply Circuit Malfunction | Backup power supply circuit voltage is low when ignition is “OFF”. | Off |
| B1544
|
Invalid Data between HVAC Control Module and Auto A/C Panel | HVAC control module sent invalid signal to auto A/C panel. | Blinking |
| HVAC control module received invalid signal from auto A/C panel. | Blinking | ||
| B1546
|
A/C Refrigerant Pressure Malfunction | A/C refrigerant pressure is less than specified value, though outside air temperature is more than specified value. | Off |
| B1550-H
|
Lost Communication between HVAC Control Module and Auto A/C Panel | Between HVAC control module and auto A/C panel, communication signal voltage is higher than specified value for specified time continuously. | Blinking |
| B1550-L
|
Between HVAC control module and auto A/C panel, communication signal voltage is lower than specified value for specified time continuously. | Blinking | |
| B1557
|
Wheel Speed Sensor and/or Its Circuit Malfunction | HVAC control module receives invalid data of vehicle speed sensor signal from ECM. | Blinking |
| B1561
|
Engine Coolant Temperature Sensor and/or Its Circuit Malfunction | HVAC control module receives invalid data of ECT signal from ECM. | Blinking |
| B1562
|
Outside Air Temperature Sensor and/or Its Circuit Malfunction | HVAC control module receives invalid data of outside air temperature signal from BCM continuously through CAN communication line. | Blinking |
| B1563
|
A/C Refrigerant Pressure Sensor and/or Its Circuit Malfunction | HVAC control module receives invalid data of A/C refrigerant pressure signal from ECM. | Off |
| B1570
|
Engine Type Signal Failure | HVAC control module receives invalid data of engine type signal from ECM. | Off |
| B1571
|
Combination Meter Spec Signal Failure | HVAC control module receives invalid data of combination meter spec signal from combination meter. | Off |
| B1580
|
EEPROM Error | EEPROM error has occurred in HVAC control module. | Off |
| U0073
|
Control Module Communication Bus Off | Transmitting and receiving error of HVAC control module for specified time continuously. | Blinking |
| U0100
|
Lost Communication With ECM | Receiving error of HVAC control module from ECM for specified time continuously. | Blinking |
| U0140
|
Lost Communication With Body Control Module | Receiving error of HVAC control module from BCM for specified time continuously. | Blinking |
| U0155
|
Lost Communication With Instrument Panel Cluster (IPC) Control Module | Receiving error of HVAC control module from combination meter for specified time continuously. | Blinking |