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.
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HOMESERVICE MANUALSMAZDA20105 SPORT, 2.3 L, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE MECHANICALAUXILIARY EMISSION CONTROL SYSTEMSEMISSION SYSTEM [L3]EVAPORATIVE EMISSION (EVAP) SYSTEM LEAK DETECTION PUMP INSPECTIONCIRCUIT OPEN/SHORT INSPECTION
2010 Mazda 5 Sport, 2.3 L, Standard
Circuit Open/Short Inspection
2010 Mazda 5 Sport, 2.3 L, StandardSECTION Circuit Open/Short Inspection
- Disconnect the PCM connector. (See PCM REMOVAL/INSTALLATION .))
- Inspect the following wiring harnesses for open or short circuit (continuity check).
Open circuit
- If there is no continuity, there is an open circuit. Repair or replace the wiring harness.
- EVAP system leak detection pump terminal A and main relay terminal C
- EVAP system leak detection pump terminal B and the body ground
- EVAP system leak detection pump terminal C and PCM terminal 1L
- EVAP system leak detection pump terminal D and PCM terminal 1X
Short circuit
- If there is continuity, there is a short circuit.
Repair or replace the wiring harness.
- EVAP system leak detection pump terminal A and the body ground
- EVAP system leak detection pump terminal B and power supply
- EVAP system leak detection pump terminal C and power supply
- EVAP system leak detection pump terminal C and body ground
- EVAP system leak detection pump terminal D and power supply
- EVAP system leak detection pump terminal D and body ground
- If there is no continuity, there is an open circuit. Repair or replace the wiring harness.
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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.