B0602
Blower Motor Control Module Circuit
2016-2021 Mazda CX-3 2.0L 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
- B0001Driver Frontal Stage 1 Deployment Control
- B0002Driver Frontal Stage 2 Deployment Control
- B0002Driver Frontal Stage 2 Deployment Control
- B0003Passenger Frontal Stage 1 Deployment Control
- B0003Passenger Frontal Stage 1 Deployment Control
- B0004Passenger Frontal Stage 2 Deployment Control
- B0004Passenger Frontal Stage 2 Deployment Control
- B0005Driver Knee Airbag Deployment Circuit
- B0005Driver Knee Airbag Deployment Circuit
B0602 on Other Vehicles
Common Questions
What does code B0602 mean on a 2016-2021 Mazda CX-3?
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 CX-3?
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 2016-2021 Mazda CX-3?
Common causes of B0602 include: Faulty blower motor control module, Power transistor failure, Poor ground connection, Blower motor drawing excessive current.