What is a Circuit Diagram?
A circuit diagram is a visual display of an electrical circuit using either basic images of parts or industry standard symbols. Symbol usage depends on the audience viewing the diagram. These two different types of circuit diagrams are called pictorial (using basic images) or schematic style (using industry standard symbols). A schematic style circuit diagram is used to give a visual representation of an electrical circuit to an electrician. The pictorial style circuit diagram would be used for a broader less technical audience.

Circuit Diagram Symbols
There are hundreds of different symbols that can be used in a circuit diagram. These include simple images of objects such as a battery or a resistor for a pictorial style circuit diagram or industry-standard symbols for objects such as capacitors or inductors.

How to Create a Circuit Diagram
There are many different ways to create a circuit diagram. They can be created manually but the more efficient way is to use diagramming software such as SmartDraw which is designed for this purpose. Diagramming software that is specifically designed for creating a circuit diagram offers several advantages.

It is fast and allows for simple construction.
It provides access to thousands of symbols.
It is easy to share electronically.
It provides precise placement of objects.
It is easy to edit.
SmartDraw allows you to quickly accurately and easily create a circuit diagram. It also allows you to create personal custom libraries of symbols you commonly use. Watch this quick tutorial on creating electrical circuit diagrams. Learn more about how to make a circuit diagram by reading this circuit diagram tutorial.
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1. starting & charging system
- batteryignition switchstarter motorgenerator & pnp switch circuit
2. ecm (engine control module)
- battery power supplygroundei system & ckp sensor circuit
- fuel pumpfuel connector & cmp sensor circuitinjector & heated o2 sensor circuit
- mtiaiacsensor (mapecttpiatknockacpho2so2 & rough road) egr valvelegr circuit & power steering pressure switch circuit
- evap canister purge solenoidcmp sensorvgiscluster & vss circuit
- clusterfuel pump & tcm circuit
- dlcmil lamp & immobilizer control circuit & ron switch circuit
3. tcm (transmission control module)
- power supplygroundpnp switchbrake switch & solenoid valve circuit
- sensor (input speedoutput speedtransmission fluid temp)clusterdlcecm & hold mode switch circuit
- pnp switch & cluster circuit
4. air conditioner
- air conditioner control switchblower motor resister & blower motor circuit
- air conditioner controlintake motor switch & air conditioner compressor circuit
5. fatc (full automatic temperature control)
- blower motorintake motormode motormax high relay & power tr circuit
- sensor (ambientincarsun & water)air mix door motora/c compressor & ecm circuit
6. radiator cooling fan circuit
7. head lamp & head lamp leveling device (hlld) circuit
8. illumination circuit
- illumination circuit -- w/ dimmer control
- lamp (license plate & w/ front / rear parking) circuit
9. front & rear fog lamp circuit
10. hazard & turn signal lamp circuit
11. stop lampcenter high mount stop lamp (chmsl) & reverse lamp circuit
12. trunk open switchtrunk latch switchtrunk room lamp & horn circuit
- dual horn
- signle horn esc