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.

SYS.OK|MANUAL.DB● LIVE

HOMESERVICE MANUALSMAZDA20105 SPORT, 2.3 L, STANDARDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 25 (ENGINE CONTROLS - SYSTEM & COMPONENT TESTING)ENGINE SENSORS & SWITCHESKNOCK SENSORMPV

2010 Mazda 5 Sport, 2.3 L, Standard

Knock Sensor: MPV

2010 Mazda 5 Sport, 2.3 L, StandardSECTION MPV

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2002 Mazda Protege5, 2002 Mazda Protege, 2002 Mazda Millenia, 2002 Mazda MX-5 Miata, and 2002 Mazda MPV. However, it is still accessible from the selected car via links, so may be relevant.

Disconnect Knock Sensor (KS) connector. Using ohmmeter, measure resistance between KS terminals "A" (Red wire) and "B" (Black wire). Resistance should be about 560,000 ohms at 68°F (20°C). If resistance is not as specified, replace KS. If KS is within specification, check for open or short circuit in wiring harness. Disconnect PCM and install 104-Pin Breakout Box (49-UN01-130) between PCM and PCM harness connector. See Figure . Perform following circuit inspections:

Open Circuit Inspection

Check for continuity between KS terminal "A" (Blue/White wire) and breakout box terminal No. 57 and between KS terminal "B" (Red/White wire) and breakout box terminal No. 4. If continuity is not present, repair or replace open wiring harness as necessary.

Short Circuit Inspection

Check for continuity between KS terminals "A" or "B" and power and between KS terminals "A" or "B" and ground. If continuity is present, repair or replace shorted wiring harness as necessary.

RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready Tools Free Quote Check Quote Shield Pro

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.