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.
2010 Mazda 5 L4-2.3LFACTORY OEM SERVICE PROCEDURE
Component Tests and General Diagnostics
BODY CONTROL MODULE (BCM) INSPECTION
1. Remove the glove compartment.
2. Remove the BCM with the connector connected.
3. Measure the voltage at each terminal and inspect that the continuity between the terminals and ground is as indicated in the Terminal Voltage Tables (Reference).
- If the voltage or continuity is not as specified in the Terminal Voltage Table (Reference), inspect the parts under "Inspection item (s)".
- If the system does not work properly even though the parts or related wiring harnesses do not have any malfunction, replace the BCM.
Terminal Voltage Table (Reference)
Terminal Voltage Table (Reference) (Part 1):
Terminal Voltage Table (Reference) (Part 2):
Terminal Voltage Table (Reference) (Part 3):
Terminal Voltage Table (Reference) (Part 4):
Terminal Voltage Table (Reference) (Part 5):
Terminal Voltage Table (Reference) (Part 6):
Terminal Voltage Table (Reference) (Part 7):
Terminal Voltage Table (Reference) (Part 8):
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With DRL
Factory Service Tools
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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.