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 3 L4-2.0LFACTORY OEM SERVICE PROCEDURE
Cruise Control Switch: Testing and Inspection
CRUISE CONTROL SWITCH INSPECTION
1. Remove the battery cover.
2. Disconnect the negative battery cable.
3. Remove the driver-side air bag module.
4. Disconnect the audio control switch connector.
5. Inspect for resistance and continuity between cruise control switch terminals 5-6 using a tester.
- It not as specified, replace the cruise control switch. (See AUDIO CONTROL SWITCH REMOVAL/INSTALLATION.)
Circuit Open/Short Inspection
1. Disconnect the PCM connector.
2. Disconnect the cruise control switch connector.
(See AUDIO CONTROL SWITCH REMOVAL/INSTALLATION.)
3. Inspect the following wiring harnesses for an open or short circuit. (Continuity inspection)
Open circuit
- If there is no continuity in the following wiring harnesses, there is an open circuit. Repair or replace the wiring harness.
- Cruise control switch terminal 6 and PCM terminal 1AD
- Cruise control switch terminal 5 and body GND
Short circuit
- If there is continuity in the following wiring harnesses, there is a short circuit. Repair or replace the wiring harness.
- Cruise control switch terminal 6 and body GND
- Cruise control switch terminal 5 and power supply
1. Remove the battery cover.
2. Disconnect the negative battery cable.
3. Remove the driver-side air bag module.
4. Disconnect the audio control switch connector.
5. Inspect for resistance and continuity between cruise control switch terminals 5-6 using a tester.
- It not as specified, replace the cruise control switch. (See AUDIO CONTROL SWITCH REMOVAL/INSTALLATION.)
Circuit Open/Short Inspection
1. Disconnect the PCM connector.
2. Disconnect the cruise control switch connector.
(See AUDIO CONTROL SWITCH REMOVAL/INSTALLATION.)
3. Inspect the following wiring harnesses for an open or short circuit. (Continuity inspection)
Open circuit
- If there is no continuity in the following wiring harnesses, there is an open circuit. Repair or replace the wiring harness.
- Cruise control switch terminal 6 and PCM terminal 1AD
- Cruise control switch terminal 5 and body GND
Short circuit
- If there is continuity in the following wiring harnesses, there is a short circuit. Repair or replace the wiring harness.
- Cruise control switch terminal 6 and body GND
- Cruise control switch terminal 5 and power supply
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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