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Monday 08:00 - 17:00 Tuesday 08:00 - 17:00 Wednesday 08:00 - 17:00 Thursday 08:00 - 17:00 Friday 08:00 - 17:00 Saturday 08:00 - 14:00

Car Electrical Systems

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This is Car Electrical Systems Official Page Created To Educate Customers, Junior Technicians,And Students About Car Problems And Troubleshooting

31/10/2026

Key Components of the EFI System

• Battery & Fuse Box: Provides electrical power (12V) and circuit protection via main and secondary fuses.
• Engine Control Unit (ECU): The central computer ("brain") that processes input data from various engine sensors to control fuel delivery and ignition timing.
• Sensors & Actuators: Includes the Throttle Position Sensor (TPS), Crankshaft Position Sensor (CKP), Fuel Pressure Sensor (FPS), and High Pressure Fuel Pump.
• Fuel Rail & Injectors: Distributes pressurized fuel to the individual cylinders (Cylinders 1–4).

Fuel Injector Spray Patterns

• Normal Spray Pattern: A fine, atomized, cone-shaped mist that ensures complete and efficient combustion.
• Partially Clogged: A distorted, uneven stream that reduces atomization and leads to poor performance.
• Heavily Clogged: Large droplets and a weak stream, causing incomplete burning and misfires.
• Dripping / Leaking: Fuel continues to drip or leak past the nozzle when closed, leading to hard starts, rough idling, or washed cylinder walls.
If you are troubleshooting a vehicle issue, let me know:
• What symptoms or engine trouble are you experiencing?
• What is the year, make, and model of the car?

31/10/2026

Key Systems Connected to the BCM:

• Power & Protection: 12V Battery and Main Fuse & Relay Box.
• Driver Controls & Switches: Ignition Switch (IG Power), Door Switches, Hood Switch, Trunk/Tailgate Switch, Brake Pedal Switch, Light Switch, Turn Signal Switch, Wiper Switch, and Steering Lock (ESCL).
• Body Outputs & Actuators: Power Window Control, Door Lock/Unlock, Side Mirror Control, Interior Lights, Exterior Lights, Wiper & Washer Control, Horn Control, and Rear Defogger.
• CAN Bus Communication: ECM/PCM, TCM, ABS/ESP, SRS Airbag, HVAC Control Module, and Immobilizer.
• Grounding: Body Ground Points (Chassis Ground).
Are you trying to troubleshoot a specific electrical problem (like door locks, lights, or wipers) or understand a particular wiring connection from this chart?.

31/10/2026

Master MAP, MAF, ECT, and TPS sensor testing with connector pinouts, voltage readings, and automotive multimeter diagnostics.

31/10/2026

8 Car Headlight Bulb Types—Which One Is Best?

31/10/2026

Automotive Reverse Light Wiring Diagram – 4-Pin Relay, 12V Battery & Backup Light Circuit Explained.

31/10/2026

How to test IC regulator!

31/10/2026

Distributor high tension wire sequence for a Ford V6 Cortina.

31/10/2026

Is that dreaded orange light staring back at you from your dashboard?
Don't panic! A glowing check engine light doesn't always mean a catastrophic engine failure. In many cases, it is simply alerting you to a common component that needs a routine replacement or cleaning.
Here are the 8 most frequent culprits behind a check engine light and what to look out for:
1. Oxygen Sensor Failure - Causes poor fuel economy, a rough idle, and high emissions.
2. Catalytic Converter Damage - Results in reduced engine power and high emissions.
3. Ignition Coil Faults - Leads to engine misfires, rough running, and poor acceleration.
4. Loose Gas Cap - The simplest fix! It can trigger the light and slightly reduce fuel efficiency.
5. Spark Plug Wear - Causes misfires, hard starting, and poor fuel economy.
6. Clogged Fuel Injectors - Leads to a rough idle, weak acceleration, and increased emissions.
7. Dirty Throttle Body - Results in a rough idle, hesitation, and sluggish acceleration.
8. Mass Airflow Sensor Failure - Causes poor fuel economy, rough running, and decreased engine power.
Paying attention to how your car handles when the light comes on can help your mechanic trace the exact problem much faster. Ignoring it can turn a small fix into an expensive repair down the road, so it is always best to get it scanned early!

31/10/2026

🚗🔧 IF THESE 4 CAR PARTS FAIL, WHAT HAPPENS NEXT? ⚠️
One small component can cause a BIG headache! Do you know what happens when these essential car parts fail?
⚡ Alternator: The battery may stop charging, and the engine can eventually stall.
🌡️ Water Pump: Poor coolant circulation can cause engine overheating.
⛽ Fuel Pump: Low fuel pressure can lead to hard starting, stalling, or a no-start condition.
🔧 Crankshaft Position Sensor (CKP): The engine may stall or fail to start if the sensor signal is lost.

31/10/2026

Have you Ever wondered how modern diesel engines deliver massive power while staying incredibly efficient?

It’s all thanks to the Common-Rail Diesel Fuel Injection System!

This high-tech diagram breaks down exactly how fuel travels through your engine to maximize performance:

1. Fuel Tank & Filter: Fuel begins its journey in the low-pressure supply tank before passing through a water-separating filter to keep the system pristine.
2. High-Pressure Fuel Pump & SCV: Driven by the engine, this pump pressurizes the fuel immensely, tightly regulated by the Fuel Pressure Control Valve (SCV).
3. Common Rail: Acting as a shared high-pressure accumulator, it holds the highly pressurized fuel steady for all injectors.
4. Fuel Injectors: The Engine Control Unit (ECU) electronically triggers these individual injectors with absolute precision, spraying fine mist directly into the cylinders for optimal combustion.
Precision engineering at its absolute finest!

Address

Germiston Johannesburg
Germiston

Opening Hours

Monday	08:00 - 17:00
Tuesday	08:00 - 17:00
Wednesday	08:00 - 17:00
Thursday	08:00 - 17:00
Friday	08:00 - 17:00
Saturday	08:00 - 14:00

Telephone

+27626302964

Website

https://www.tiktok.com/@carelectricalsystems?_r=1&_t=ZS-996APmwy5nL, https://www.tiktok.com/@usermofelahautoelectric?_r=

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