Electrical Circuit Diagrams

List of abbreviations used in diagrams

~2min read

Latin

2WBS solenoid valve, canister bypass

A/C air conditioner

A/T automatic transmission

ABS anti-lock brake system

ACC ignition switch position, accessory

ACS air conditioning system

ATP A/T selector position

BKSW brake pedal switch

CKP crankshaft position sensor

CRS thermostat

CYP cylinder sensor

D4IND D4 position indicator, A/T

ECA electronic control assembly

ECT engine coolant temperature sensor

E-EGR EGR system sensor

EGR exhaust gas recirculation system

ELD electrical load detector

EVAP evaporative emission control system

FANC cooling fan

FLR PGM-FI main relay

GND ground

IAC idle air control valve

IACV idle air control valve

IAT intake air temperature sensor

ICM ignition control module

IGN ignition

IGP1, IGP2 injector common terminals

ILU gear shift lock

IMOCD —

IMOEN enable

IMOLMP lamp

IND indicator lamp

INJ injector

K-LINE data link

LG1, LG2 ground terminals 1 and 2

LOCK ignition switch position, steering locked

LS solenoid

M/T manual transmission

MAP manifold absolute pressure sensor

MCS engine-mounted solenoid valve

MIL malfunction indicator lamp

O2S oxygen sensor (λ sensor)

OP2SW open position switch 2 signal

OP3SW open position switch 3 signal

PCS canister purge valve

PG1, PG2 ground terminals 1 and 2

PGM-FI fuel injection control unit

PO2SHTC primary O2 sensor heater control

PSPSW power steering pressure switch

PTANK fuel tank pressure sensor

PWR power

RPM revolutions per minute

RUN ignition switch position, engine running

SCS solenoid valve for intake air control

SHO2S secondary O2 sensor

SLU/SIL shift lock system

SO2SHTS secondary O2 sensor heater

SRS supplemental restraint system

START ignition switch position, engine cranking

STS power in START position

TDC top dead center

TPS throttle position sensor/switch

ULE ultra-low emission engine

VCC torque converter clutch

VREF reference voltage (generated by ECA)

VSS vehicle speed sensor/signal

VSV purge cut-off valve

VTEC variable valve timing and lift electronic control system

VTS VTEC solenoid valve

Russian

AT automatic transmission

D/V and D/VYKL sensor/switch

K/V air conditioner

MT manual transmission

E/M and E/MAGN. electromagnetic

E/MOTOR electric motor

Before starting diagnosis of a failure in any circuit, check the condition of the fuses and circuit breakers protecting it (if provided). Make sure the battery is fully charged and check the condition of the wire connections from its terminals (see Chapter Maintenance and Tune-up).

When searching for a failure in a specific circuit, first check the condition of the electrical connections of its wiring. When disconnecting electrical connectors, pull only on the connector housings, never on the wire harness.

Wire color designations in diagrams

Code Color

BLK Black

BLU Blue

BRN Brown

GRN Green

GRY Gray

NCA Any Color

ORG Orange

PNK Pink

PPL Purple

RED Red

VIO Violet

WHT White

YEL Yellow

TAN Tan

Test yourself

A quick Honda Accord quiz: every answer comes with an explanation and a link to the manual page.