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.
2005 Mazda RX8 2RTR-1.3LFACTORY OEM SERVICE PROCEDURE
Control Module HVAC: Testing and Inspection
A/C AMPLIFIER INSPECTION
1. Turn the ignition switch to the ON position
2. Connect the negative (-) lead of the tester to body ground
3. By inserting the positive (+) lead of the tester into each A/C amplifier terminal, measure the voltage according to the terminal voltage table.
- If there is any malfunction, inspect the parts under "Inspection item(s)".
- If the parts under "Inspection item(s)" are found to be normal, replace the A/C amplifier.
1. Turn the ignition switch to the ON position
2. Connect the negative (-) lead of the tester to body ground
Terminal Voltage Table (Reference) Part 1:
Terminal Voltage Table (Reference) Part 2:
Terminal Voltage Table (Reference) Part 3:
3. By inserting the positive (+) lead of the tester into each A/C amplifier terminal, measure the voltage according to the terminal voltage table.
- If there is any malfunction, inspect the parts under "Inspection item(s)".
- If the parts under "Inspection item(s)" are found to be normal, replace the A/C amplifier.
Factory Service Tools
Use the Manual With the Right Hardware
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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.