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.
2004 Mazda 6 L4-2.3LFACTORY OEM SERVICE PROCEDURE
Power Door Lock Control Module: Testing and Inspection
DOOR LOCK CONTROL MODULE INSPECTION
1. Measure the voltage at the door lock control module terminals (other than terminals 1E, 2G, 2K and 2W) as indicated below.
- If not as specified, inspect the parts listed under "Action."
2. Disconnect the negative battery cable.
3. Disconnect the door lock control module connector and inspect for continuity between terminal 1E or 2W and the bracket.
4. Inspect for continuity at terminals 1 E, 2G, 2K and 2W as indicated below.
5. If the parts and wiring harnesses are okay but the system still does not work properly, perform the troubleshooting.
Terminal voltage list (Reference)
1. Measure the voltage at the door lock control module terminals (other than terminals 1E, 2G, 2K and 2W) as indicated below.
- If not as specified, inspect the parts listed under "Action."
2. Disconnect the negative battery cable.
3. Disconnect the door lock control module connector and inspect for continuity between terminal 1E or 2W and the bracket.
4. Inspect for continuity at terminals 1 E, 2G, 2K and 2W as indicated below.
5. If the parts and wiring harnesses are okay but the system still does not work properly, perform the troubleshooting.
Terminal 1A - 1E:
Terminal 1F - 2L:
Terminal 2M - 2X:
Terminal voltage list (Reference)
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.
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