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 MANUALSINFINITI2002Q45 V8-4.5L (VK45DE)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTIGNITION SYSTEMKNOCK SENSORTESTING AND INSPECTION
2002 Infiniti Q45 V8-4.5L (VK45DE)
Knock Sensor: Testing and Inspection
2002 Infiniti Q45 V8-4.5L (VK45DE)SECTION Testing and Inspection
Component Inspection
KNOCK SENSOR
Check resistance between knock sensor terminal 1 and ground.
NOTE: It is necessary to use an ohmmeter which can measure more than 10 MOhm.
Resistance: Approximately 530 - 590 kOhm [at 20 °C (68 °F)]
CAUTION: Do not use any knock sensors that have been dropped or physically damaged. Use only new ones.
KNOCK SENSOR
Check resistance between knock sensor terminal 1 and ground.
NOTE: It is necessary to use an ohmmeter which can measure more than 10 MOhm.
Resistance: Approximately 530 - 590 kOhm [at 20 °C (68 °F)]
CAUTION: Do not use any knock sensors that have been dropped or physically damaged. Use only new ones.
RENDER: 1.0x
NO RELATED
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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.