B0602low severityBody
Blower Motor Control Module Circuit
on 2004 Land Rover Discovery 4.0L V8 · AWD
What this code means
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.
Other Body codes on this vehicle
B0001
Driver Frontal Stage 1 Deployment Control
B0002
Driver Frontal Stage 2 Deployment Control
B0003
Passenger Frontal Stage 1 Deployment Control
B0004
Passenger Frontal Stage 2 Deployment Control
B0005
Driver Knee Airbag Deployment Circuit
B0006
Passenger Knee Airbag Deployment Circuit
B0010
Driver Side Airbag Deployment
B0011
Driver Side Airbag Deployment Circuit Open
B0012
Driver Side Airbag Deployment Circuit Short to Ground
B0013
Driver Side Airbag Deployment Circuit Short to Battery