Infiniti G20 P11 1999–2002 Wiring Diagram EWD
Infiniti G20 P11 1999–2002 Electrical Wiring Diagram (EWD) is a detailed guide that provides comprehensive wiring schematics for the electrical systems of the Infiniti G20 P11. This manual helps technicians and enthusiasts troubleshoot electrical issues by outlining connections, circuit layouts, and component locations. It covers all key systems, including lighting, power windows, audio, and engine management. Ideal for accurate diagnostics and repairs, this diagram ensures precise maintenance of the vehicle’s electrical functions, making it an essential resource for professional mechanics and DIY users alike.
Infiniti G20 P11 Typical Problems with Wiring, Sensors, Electrical
The Infiniti G20 P11 (1999-2002) had typical wiring and electrical system problems that sometimes occurred with the age and mileage of the car. Here are the main problems:
1. Crankshaft Position Sensor (CPS) Failures
Description: One of the most common failures that can cause problems with starting the engine or its sudden stalling while driving.
Symptoms: Difficulty starting, engine does not start or may stall.
Cause: Sensor is worn out or damaged, poor electrical connections.
2. Mass Air Flow (MAF) Sensor Problems
Description: This sensor measures the amount of air entering the engine. If it fails, the car can run rich or lean, which will lead to reduced power and increased fuel consumption.
Symptoms: Uneven engine operation, loss of power, increased fuel consumption.
Cause: Sensor contamination or failure.
3. Alternator Failures
Description: Alternator problems could cause the battery to be undercharged or completely lose electrical power while driving.
Symptoms: Headlights flickering or dimming, dead battery, problems with starting the engine.
Cause: Worn out alternator, belt or wiring problems.
4. Blown fuses and relays
Description: Over time, fuses or relays could fail, causing malfunctions in various systems, from the air conditioner to the headlights.
Symptoms: Malfunctions in electrical systems such as the air conditioner, windows, headlights, etc.
Cause: Age of the vehicle or electrical overloads.
5. Wiring and connector problems
Description: As vehicles age, they often develop wiring problems, especially in areas with high humidity or corrosion.
Symptoms: Intermittent malfunctions in various electrical systems, short circuits, disconnected electrical components.
Cause: Worn wiring, corroded contacts, loose or damaged connections.
6. Power window problems
Description: Over time, window motors or regulators themselves could wear out, causing malfunctions in the windows.
Symptoms: Windows do not roll up or roll down, or get stuck halfway.
Cause: Worn motor or lift mechanism.
7. ABS system malfunctions
Description: Problems with the ABS sensors could cause the brake interlock system to not work properly.
Symptoms: ABS indicator on the instrument panel illuminates, reduced braking efficiency.
Cause: Malfunction of one of the sensors or a problem with the system wiring.
8. Headlight and exterior lighting problems
Description: Over time, problems with the headlight system could develop, including incorrect operation of the headlights, parking lights, and brake lights.
Symptoms: Flickering or loss of lights, incorrect operation of the brake lights.
Cause: Wiring problems, worn connectors, or poor contacts.
9. Central locking malfunctions
Description: The central locking could stop working due to problems with the electrical components or the lock motor.
Symptoms: Door locks do not work with the remote control or the button inside the car.
Cause: Worn out lock motors or damaged wiring.
10. Engine Control Unit (ECU) Problems
Description: Although this is a rarer problem, malfunctioning ECUs can cause various electrical and mechanical problems.
Symptoms: Unexpected errors, engine shutdown, sensor problems.
Cause: Electrical failures, corroded contacts, or outdated firmware.