Mazda engine MZR–CD. Manual - part 4

ELECTRICAL SYSTEM 

GI–11

GI

Disconnecting connectors

•

When disconnecting connector, grasp the 
connectors, not the wires.

•

Connectors can be disconnected by pressing or 
pulling the lock lever as shown.

Locking connector

•

When locking connectors, listen for a click 
indicating they are securely locked.

Inspection

•

When a tester is used to inspect for continuity or 
measuring voltage, insert the tester probe from 
the wiring harness side.

WGIWXX0041E

WGIWXX0042E

X3U000WB1

X3U000WB2

GI–12

ELECTRICAL SYSTEM 

•

Inspect the terminals of waterproof connectors 
from the connector side since they cannot be 
accessed from the wiring harness side.

Caution

••••

To prevent damage to the terminal, wrap 
a thin wire around the tester probe before 
inserting into terminal.

Terminals
Inspection

•

Pull lightly on individual wires to verify that they 
are secured in the terminal.

Wiring Harness
Wiring color codes

•

Two-color wires are indicated by a two-color code symbol.

•

The first letter indicates the base color of the wire 
and the second the color of the stripe.

End Of Sie

WGIWXX0045E

X3U000WB4

CODE

COLOR

CODE

COLOR

B

Black

O

Orange

BR

Brown

P

Pink

G

Green

R

Red

GY

Gray

V

Violet

L

Blue

W

White

LB

Light Blue

Y

Yellow

LG

Light Green

X3U000WB7

NEW STANDARDS 

GI–13

GI

NEW STANDARDS

AME202800020101

•

Following is a comparison of the previous standard and the new standard.

NEW STANDARDS

New Standard

Previous Standard

Remark

Abbrevi-

ation

Name

Abbrevi-
ation

Name

AP

Accelerator Pedal

—

Accelerator Pedal

ACL

Air Cleaner

—

Air Cleaner

A/C

Air Conditioning

—

Air Conditioning

BARO

Barometric Pressure

—

Atmospheric Pressure

B+

Battery Positive Voltage

Vb

Battery Voltage

—

Brake Switch

—

Stoplight Switch

—

Calibration Resistor

—

Corrected Resistance

#6

CMP sensor Camshaft Position Sensor

—

Crank Angle Sensor

CAC

Charge Air Cooler

—

Intercooler

CLS

Closed Loop System

—

Feedback System

CTP

Closed Throttle Position

—

Fully Closed

CPP

Clutch Pedal Position

—

Idle Switch

CIS

Continuous Fuel Injection System

—

Clutch Position

CS sensor

Control Sleeve Sensor

CSP  sensor Control Sleeve Position Sensor

#6

CKP sensor Crankshaft Position Sensor

—

Crank Angle Sensor 2

DLC

Data Link Connector

—

Diagnosis Connector

DTM

Diagnostic Test Mode

—

Test Mode

#1

DTC

Diagnostic Trouble Code(s)

—

Service Code(s)

DI

Distributor Ignition

—

Spark Ignition

DLI

Distributorless Ignition

—

Direct Ignition

EI

Electronic Ignition

—

Electronic Spark Ignition

#2

ECT

Engine Coolant Temperature

—

Water Thermo

EM

Engine Modification

—

Engine Modification

—

Engine Speed Input Signal

—

Engine RPM Signal

EVAP

Evaporative Emission

—

Evaporative Emission

EGR

Exhaust Gas Recirculation

—

Exhaust Gas Recirculation

FC

Fan Control

—

Fan Control

FF

Flexible Fuel

—

Flexible Fuel

4GR

Fourth Gear

—

Overdrive

—

Fuel Pump Relay

—

Circuit Opening Relay

#3

FSO 

solenoid

Fuel Shut Off Solenoid

FCV

Fuel Cut Valve

#6

GEN

Generator

—

Alternator

GND

Ground

—

Ground/Earth

HO2S

Heated Oxygen Sensor

—

Oxygen Sensor

With heater

IAC

Idle Air control

—

Idle Speed Control

—

IDM Relay

—

Spill Valve Relay

#6

—

Incorrect Gear Ratio

—

—

—

Injection Pump

FIP

Fuel Injection Pump

#6

—

Input/Turbine Speed Sensor

—

Pulse Generator

IAT

Intake Air Temperature

—

Intake Air Thermo

KS

Knock Sensor

—

Knock Sensor

MIL

Malfunction Indicator Lamp

—

Malfunction Indicator Light

MAP

Manifold Absolute Pressure

—

Intake Air Pressure

MAF sensor Mass Air Flow Sensor

—

Airflow Sensor

MFL

Multiport Fuel Injection

—

Multiport Fuel Injection

OBD

On-Board Diagnostic

—

Diagnosis/SelfDiagnosis

OL

Open Loop

—

Open Loop

GI–14

NEW STANDARDS 

#1 : Diagnostic trouble codes depend on the diagnostic test mode
#2 : Controlled by the PCM
#3 : In some models, there is a fuel pump relay that controls pump speed.  That relay is now called the fuel pump 

relay (speed).

#4 : Device that controls engine and powertrain
#5 : Directly connected to exhaust manifold
#6 : Part name of diesel engine

End Of Sie

—

Output Speed Sensor

—

Vehicle Speed Sensor 1

OC

Oxidation Catalytic Converter

—

Catalytic Converter

O2S

Oxygen Sensor

—

Oxygen Sensor

PNP

Park/Neutral Position

—

Park/Neutral Range

—

PCM Control Relay

—

Main Relay

#6

PSP

Power Steering Pressure

—

Power Steering Pressure

PCM

Powertrain Control Module

ECU

Engine Control Unit

#4

—

Pressure Control Solenoid

—

Line Pressure Solenoid Valve

PAIR

Pulsed Secondary Air Injection

—

Secondary Air Injection System

Pulsed  
injection

—

Pump Speed Sensor

—

NE Sensor

#6

AIR

Secondary Air Injection

—

Secondary Air Injection System

Injection 
with air 
pump

SAPV

Secondary Air Pulse Valve

—

Reed Valve

SFI

Sequential Multipoint Fuel Injection

—

Sequential Fuel Injection

—

Shift Solenoid A

—

1–2 Shift Solenoid Valve

—

Shift A Solenoid Valve

—

Shift Solenoid B

—

2–3 Shift Solenoid Valve

—

Shift B Solenoid Valve

—

Shift Solenoid C

—

3–4 Shift Solenoid Valve

3GR

Third Gear

—

3rd Gear

TWC

Three Way Catalytic Converter

—

Catalytic Converter

TB

Throttle Body

—

Throttle Body

TP sensor

Throttle Position Sensor

—

Throttle Sensor

TCV

Timer Control Valve

TCV

Timing Control Valve

#6

TCC

Torque Converter Clutch

—

Lockup Position

TCM

Transmission (Transaxle) Control 
Module

—

ECAT Control Unit

—

Transmission (Transaxle) Fluid 
Temperature Sensor

—

ATF Thermosensor

TR

Transmission (Transaxle) Range

—

Inhibitor Position

TC

Turbocharger

—

Turbocharger

VSS

Vehicle Speed Sensor

—

Vehicle Speed Sensor 

VR

Voltage Regulator

—

IC Regulator

VAF sensor Volume Air Flow Sensor 

—

Air flow Sensor

WUTWC

Warm Up Three Way Catalytic 
Converter

—

Catalytic Converter

#5

WOT

Wide Open Throttle

—

Fully Open

New Standard

Previous Standard

Remark

Abbrevi-

ation

Name

Abbrevi-
ation

Name