Actron SunPro CP7678 User Manual

Index
Safety Precautions ....................................... 2
Vehicle Service Information ......................... 3
Visual Inspection .......................................... 3
Warranty ..................................................... 72
1. Multimeter Basic Functions
Functions and Display Definitions............ 4
Setting the Range..................................... 6
Battery and Fuse Replacement ............... 7
Measuring DC Voltage ............................. 8
Measuring Resistance.............................. 8
Measuring DC Current ............................. 9
Testing for Continuity ............................. 10
Testing Diodes........................................ 10
Measuring Engine RPM (TACH) ............ 11
Measuring Dwell ..................................... 12
Measuring Duty Cycle ............................ 12
2. Automotive Testing with the CP7678
General Testing ...................................... 13
- Testing Fuses ...................................... 13
- Testing Switches..................................13
- Testing Solenoids and Relays ............. 14
1
CP7678
®
by
®
Digital Multimeter
OPERATING
INSTRUCTIONS
Starting / Charging System Testing ........... 15
- No Load Battery Test........................... 15
- Engine Off Battery Current Draw ........ 16
- Cranking Voltage/Battery Load Test ... 17
- Voltage Drops ...................................... 18
- Charging System Voltage Test............ 19
Ignition System Testing .............................. 20
- Ignition Coil Testing ............................. 20
- Ignition System Wires .......................... 22
- Hall Effect Sensors/Switches ..............23
- Magnetic Pick-Up Coils .......................24
- Reluctance Sensors ............................. 24
- Ignition Coil Switching Action .............. 25
Fuel System Testing................................... 26
- Testing GM C-3 Mixture Control
Solenoid Dwell .................................... 26
- Measuring Fuel Injector Resistance.... 27
Testing Engine Sensors ............................. 28
- Oxygen (O
2
) Type Sensors.................. 28
- Temperature Type Sensors................. 30
- Position Type Sensors –
Throttle and EGR Valve Position,
Vane Air Flow ......................................31
- Manifold Absolute Pressure (MAP) and
Barometric Pressure (BARO) Sensors ..... 32
- Mass Air Flow (MAF) Sensors ..............34
250V MAX
15A MAX
FUSED
COM
DC
15A
AUTO POWER OFF CP7678
®
OFF
200
20
2
DC V
200
m
20M
200
K
20K
2K
200
8CYL
6CYL
TACH
X10
5CYL
4CYL
8CYL
6CYL
5CYL
4CYL
DWELL
DUTY
CYCLE
%
OHMS
°
20
15
A
20V

Actron SunPro CP7678 Specifications

General

Type	Digital Multimeter
Display	LCD
Resistance Range	200Ω - 20MΩ
Diode Test	Yes
Continuity Test	Yes
Battery Test	Yes
Power Source	9V Battery
AC Voltage Range	200V - 600V
DC Current Range	200µA - 10A
Battery	9V
Current Range	200µA - 10A

Summary

SAFETY GUIDELINES

Section 1. Multimeter Basic Functions

Functions and Display Definitions

Defines multimeter features, functions, and how to make measurements.

Setting the Range

Explains how to select the correct range for accurate measurements.

Measuring DC Voltage

How to measure direct current voltages using the multimeter.

Measuring Resistance

How to measure electrical resistance in ohms using the multimeter.

Measuring DC Current

How to measure direct current amperes using the multimeter.

Testing for Continuity

Procedure for checking if a circuit is open or closed with an audible tone.

Measuring Engine RPM (TACH)

How to measure engine revolutions per minute using the TACH function.

Section 2. Automotive Testing

General Testing

Describes general testing procedures for fuses, switches, solenoids, and relays.

Starting/Charging System Testing

How to test the vehicle's starting and charging systems.

Ignition System Testing

Procedures for testing ignition system components like coils and wires.

Testing Engine Sensors

How to test various engine sensors like Oxygen, Temperature, and Position types.

Manifold Absolute Pressure (MAP) and Barometric Pressure (BARO) Sensors

How to test MAP and BARO sensors for engine vacuum and pressure signals.

Mass Air Flow (MAF) Sensors

How to test MAF sensors for measuring engine air intake.

FULL ONE (1) YEAR WARRANTY