Actron CP7677 User Manual

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

Actron CP7677 Specifications

Electrical Specifications

DC voltage range	200mV, 2V, 20V, 200V, 1000V
AC voltage range	2V, 20V, 200V, 750V
DC current range	200mA, 10A
Resistance range	200Ω, 2KΩ, 20KΩ, 200KΩ, 2MΩ, 20MΩ

Measurement 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

Dwell range	4CYL, 6CYL, 8CYL
RPM range	4CYL, 6CYL, 8CYL
Audible continuity threshold	less than 30-50 Ohms