Infiniti FX35, FX50 (S51) Full Wiring Diagrams

Infiniti FX35, FX50 (S51) Full Wiring Diagrams, Electrical System, Fuse and Relay Diagram is a detailed electrical wiring diagram guide for the Infiniti FX35 and FX50 S51 series (2009-2013) models. Includes complete wiring diagrams, fuse and relay locations, and instructions for diagnosing and troubleshooting the electrical system. This guide will help owners and technicians effectively service and repair electrical equipment, ensuring reliable operation of all vehicle systems.

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• 1. Ignition System Problems:

Ignition Coil Failures: A common problem, especially on the FX35, bad coils can cause misfires, resulting in reduced power and rough running.

Worn Spark Plugs: Prematurely worn spark plugs can cause rough running and starting problems.

• 2. Wiring System Problems:

Corroded Terminals and Connections: Moisture and environmental factors can corrode wires and connections, causing problems with everything from headlights to engine controls.

Damaged Wiring Harnesses: Harnesses in the engine bay are especially common, causing sensors and other systems to malfunction.

• 3. Battery and Alternator Problems:

Rapid Battery Discharge: Abnormal battery discharge can be caused by a faulty alternator or current leaks from faulty wiring.

Alternator Malfunctions: A faulty alternator can cause the system to lose power, which can result in flickering headlights or electronics malfunctioning.

• 4. Engine Management Unit (ECU) Malfunctions:

ECU Malfunction: The engine control unit may malfunction, causing false errors on the instrument cluster, loss of power, or erratic engine operation.

Software Errors: The ECU software may require an update to correct certain performance or electrical system issues.

• 5. Sensor Malfunctions:

Oxygen Sensors (Lambda): The FX35 and FX50 are known to frequently fail oxygen sensors, which can result in poor fuel economy and engine management errors.

ABS Sensor: Faulty ABS sensors can cause the ABS to operate incorrectly, including the system suddenly engaging or shutting off.

Tire Pressure Monitoring System (TPMS): The tire pressure monitoring system often fails due to problems with the wiring or sensors, which causes the malfunction indicator to remain on.

• 6. Keyless Entry and Start Problems:

Keyless Entry Problems: Sometimes the Keyless Go system will fail to recognize the key or the entry and start system will fail.

Antenna Problems: Problems with the antenna or control unit can cause the vehicle to fail to unlock or start.

• 7. Headlight and Light Problems:

Xenon Headlight Problems: The FX35 and FX50 are equipped with xenon headlights, which can fail due to problems with the wiring or control units for the headlights.

Taillight Problems: It is not uncommon for the taillight wiring to fail, causing them to burn out or not function properly.

• 8. HVAC Problems:

Fan and HVAC Problems: Electrical wiring problems can cause the HVAC and heating fans to malfunction, causing the climate control to not work properly.

• 9. Power Window Problems:

Power Window Problems: Power windows may not work properly due to wiring problems or worn out motors.