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Actron CP7677 User Manual

Actron CP7677
34 pages
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1
Index
Safety Precautions ......................................... 2
Vehicle Service Information ........................... 3
Visual Inspection ............................................ 3
Electrical Specifications ............................... 34
Warranty ..................................................... 104
1. Multimeter Basic Functions
Functions and Display Definitions ............ 4
Setting the Range ..................................... 6
Battery and Fuse Replacement ................ 7
Measuring DC Voltage.............................. 8
Measuring AC Voltage .............................. 8
Measuring Resistance .............................. 9
Measuring DC Current .............................. 9
Testing for Continuity .............................. 10
Testing Diodes ........................................ 11
Measuring Engine RPM .......................... 11
Measuring Dwell ..................................... 12
2. Automotive Testing with the CP7677
General Testing ...................................... 13
- Testing Fuses ...................................... 13
- Testing Switches ................................. 13
- Testing Solenoids and Relays ............ 14
Starting / Charging System Testing ....... 15
- No Load Battery Test .......................... 15
- Engine Off Battery Current Draw ........ 15
CP7677
Auto
TroubleShooter
OPERATING
INSTRUCTIONS
- Cranking Voltage/Battery Load Test ... 16
- Voltage Drops ...................................... 17
- Charging System Voltage Test ........... 18
Ignition System Testing .......................... 19
- Ignition Coil Testing ............................. 19
- Ignition System Wires.......................... 21
- Hall Effect Sensors/Switches .............. 22
- Magnetic Pick-Up Coils ....................... 23
- Reluctance Sensors ............................ 23
- Ignition Coil Switching Action .............. 24
Fuel System Testing ............................... 25
- Testing GM C-3 Mixture Control
Solenoid Dwell .................................... 25
- Measuring Fuel Injector Resistance ... 26
Testing Engine Sensors.......................... 27
- Oxygen (O
2
) Type Sensors ................. 27
- Temperature Type Sensors ................ 29
- Position Type Sensors –
Throttle and EGR Valve Position,
Vane Air Flow ...................................... 30
- Manifold Absolute Pressure (MAP) and
Barometric Pressure (BARO) Sensors 31
- Mass Air Flow (MAF) Sensors ............ 32
Instrucciones en español ....35
Instructions en français .......69
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Actron CP7677 Specifications

Electrical Specifications IconElectrical Specifications
DC voltage range200mV, 2V, 20V, 200V, 1000V
AC voltage range2V, 20V, 200V, 750V
DC current range200mA, 10A
Resistance range200Ω, 2KΩ, 20KΩ, 200KΩ, 2MΩ, 20MΩ
Measurement Accuracy IconMeasurement Accuracy
DC voltage accuracy (200mV to 200V)± (0.5% rdg + 5 dgts)
DC voltage accuracy (1000V)± (0.8% rdg + 5 dgts)
AC voltage accuracy (2V to 200V)± (0.8% rdg + 5 dgts)
AC voltage accuracy (750V)± (1.0% rdg + 4 dgts)
DC current accuracy (200mA)± (0.8% rdg + 5 dgts)
DC current accuracy (10A)± (1.2% rdg + 5 dgts)
Resistance accuracy (200Ω to 2MΩ)± (0.8% rdg + 5 dgts)
Resistance accuracy (20MΩ)± (1.5% rdg + 5 dgts)
Dwell accuracy± (3.0% rdg + 5 dgts)
RPM accuracy± (3.0% rdg + 5 dgts)
Additional Features IconAdditional Features
Dwell range4CYL, 6CYL, 8CYL
RPM range4CYL, 6CYL, 8CYL
Audible continuity thresholdless than 30-50 Ohms

Summary

Multimeter Basic Functions

Functions and Display Definitions

Defines multimeter functions, symbols, and special display indications.

Setting the Range

Explains how to select the correct range for accurate measurements and avoid overranging.

Measuring DC Voltage

Details the procedure for measuring DC voltages in various automotive circuits.

Measuring Resistance

Outlines steps for measuring component resistance, like coils and sensors.

Automotive Testing

Starting and Charging System Tests

Covers tests for battery condition and charging system performance.

Ignition System Tests

Details procedures for testing ignition coils, wires, and sensors.

Engine Sensor Tests

Provides guidance for testing various engine sensors like O2, temperature, and position.

Electrical Specifications

DC Voltage Specifications

Lists the range and accuracy for DC voltage measurements.

Resistance Specifications

Details the range and accuracy for resistance measurements.

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