B0602
Blower Motor Control Module Circuit
2014-2021 Mazda Mazda6 2.5L I4
Low SeverityBodyGeneric (SAE)
Description
Malfunction in the electronic blower motor speed control module (replaces traditional resistor on newer vehicles).
Symptoms
- Blower speed erratic
- No blower motor operation
- Blower runs at full speed only
- Control module overheating
Common Causes
- Faulty blower motor control module
- Power transistor failure
- Poor ground connection
- Blower motor drawing excessive current
Diagnostic Steps
- Test control module power and ground
- Measure blower motor current draw
- Check control signal from HVAC module
- Test control module output
- Inspect connector
Repair Notes
Replace blower motor control module. Check blower motor current draw to prevent repeat failure.
Related Codes
Other Body Codes
- B0001Driver Frontal Stage 1 Deployment Control
- B0002Driver Frontal Stage 2 Deployment Control
- B0003Passenger Frontal Stage 1 Deployment Control
- B0004Passenger Frontal Stage 2 Deployment Control
- B0005Driver Knee Airbag Deployment Circuit
- B0006Passenger Knee Airbag Deployment Circuit
- B0007Rear Left Side Airbag Deployment Circuit
- B0008Rear Right Side Airbag Deployment Circuit
- B0009Rear Center Airbag Deployment Circuit
- B0010Driver Side Airbag Deployment
B0602 on Other Vehicles
Common Questions
What does code B0602 mean on a 2014-2021 Mazda Mazda6?
B0602 stands for "Blower Motor Control Module Circuit". Malfunction in the electronic blower motor speed control module (replaces traditional resistor on newer vehicles).
What are the symptoms of B0602 on a Mazda Mazda6?
Common symptoms of B0602 include: Blower speed erratic, No blower motor operation, Blower runs at full speed only, Control module overheating.
What causes B0602 on a 2014-2021 Mazda Mazda6?
Common causes of B0602 include: Faulty blower motor control module, Power transistor failure, Poor ground connection, Blower motor drawing excessive current.