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Electrical Schematic Symbols

Electrical Schematic Symbols


Voltage Indicators

Symbol Description

Battery Voltage

Ignition Switch - Off Position

Ignition Switch - Accessory Position

Ignition Switch - Run Position

Ignition Switch - Start Position



General Icons

Symbol Description

Master Component List Icon This icon is used on the schematic to link to the Master Electrical Component List.

Description and Operation Icon This icon is used on the schematic to link to the Description and Operation of that particular system.

Computer Programming Icon This icon is used on the schematic to link to Control Module References, which identifies which components need programming upon replacement.

Next Schematic Page Icon This icon is used on the schematic to navigate to the next schematic in the subsystem.

Previous Schematic Page Icon This icon is used on the schematic to navigate to the previous schematic in the subsystem.

Supplemental Inflatable Restraint (SIR) or Supplemental Restraint System (SRS) Icon This icon is used to alert the technician that the system contains SIR/SRS components that require certain precautions before servicing.

Information Icon This icon is used to alert the technician that there is additional information that will aid in servicing a system.

Danger - High Voltage Icon This icon is used to alert the technician that a component/system contains 300 volt circuits.

High Voltage Icon This icon is used to alert the technician that a component/system contains voltage greater than 42 volts but less than 300 volts.

Caution Icon This icon is used to advise the technician to use caution when servicing this component.

Functional Serial Data Communication This icon is used to show the technician that the serial data circuit detail is shown incomplete. It also provides an active link to the Data Communication Schematics were the circuit is shown complete.



Switch Position Icons

Symbol Description

Generic Up Arrows

Generic Down Arrows

Generic Left Arrows

Generic Right Arrows

Generic Express Down Arrows

On/Off Icon

Generic Lock Icon

Generic Unlock Icon

Generic Window Switch Positions - 4 Door

Generic Window Switch Positions - 2 Door



Module Circuit Function Icons

Symbol Description

I/O Pull-Down Resistors (-)

I/O Pull-Up Resistors (+)

I/O High-Side Drive Switch (+)

I/O Low-Side Drive Switch (+)

I/O Bidirectional Switch (+/-)

Pulse-Width Modulation Symbol

Battery Voltage

Ignition Voltage

Voltage Reference

A/C Voltage

Low Reference

Ground

Serial Data

Antenna Signal - In

Antenna Signal - Out

Brake Apply



Harness Components

Symbol Description

Fuse

Fuse Supplied by a Relay

Circuit Breaker

Fusible Link

Ground

Case Ground

Inline harness connectors

Inline harness connectors

Pigtail Connection

Pigtail Connection

Provisional or Diagnostic Connector

Blunt Cut Wire

Incomplete Physical Splice

Complete Physical Splice - 2 Wires

Complete Physical Splice - 3 or more wires

Wire Crosses

Twisted Wires

Shield

Circuit References

Circuit Continuation Arrowheads

Option Breakpoint

Ground Circuit Connection

Connector Shorting Clip



Component Parts

Symbol Description

Partial Component When a component is represented in a dashed box, the component or its wiring is not shown in its entirety.

Entire Component When a component is represented in a solid box the component or its wiring is shown in its entirety.

Connector Directly Attached to Component

Pigtail Connector



Switches and Relays

Symbol Description

Accessory Power Outlet

Cigar Lighter

Switch - 2 Position Normally Open

Switch - 2 Position Normally Closed

Switch - Rocker

Switch - Contact Plate (1 Wire)

Switch - Contact Plate (2 Wire)

Switch - 3 Position

Switch - 4 Position

Switch - 5 Position

Switch - 6 Position

Switch Actuator - Push (Momentary)

Switch Actuator - Push (Latching)

Switch Actuator - Pull (Momentary)

Switch Actuator - Pull (Latching)

Switch Actuator - Rotate (Momentary)

Switch Actuator - Rotate (Latching)

Switch Actuator - Slide (Momentary)

Switch Actuator - Slide (Latching)

Switch Actuator - Pressure (Momentary)

Switch Actuator - Temperature (Momentary)

Switch Actuator - Volume (Latching)

4-Pin Single Pole/Throw Relay - Normally Open

5-Pin Relay - Normally Closed



Devices and Sensors

Symbol Description

Battery

Battery Assembly - Hybrid

Single Filament Light Bulb

Double Filament Light Bulb

Light Emitting Diode (LED)

Photo Sensor

Gauge

Diode

Capacitor

Resistor

Variable Resistor

Variable Resistor - NTC

Breakable Wire

Heater Core

Position Sensor

Pressure sensor

Knock Sensor

Inductive Type Sensor - 2-Wire

Inductive Type Sensor - 3-Wire

Hall Effect Sensor - 2-Wire

Hall Effect Sensor - 3-Wire

Oxygen Sensor - 2-Wire

Heated Oxygen Sensor - 4-Wire

Solenoid - Actuator

Solenoid - Valve

Clutch

Motor

Motor with PTC

Antenna

Speaker

Horns

Microphone

Airbag

SIR Coil

SIR Impact Sensor