Actron CP7678 Operations Instructions

IndexSafety Precautions ... 2Vehicle Service Information ... 3Visual Inspection ...

15A MAXFUSEDCOMDC15A20M200 K20K2K2008CYL6CYLTACHX105CYL4CYL8CYLOHMS15A250V MAX250V MAX15A MAXFUSEDCOMDC15A20M200 K20K2K2008CYL6CYLTACHX10

250V MAX15A MAXFUSEDCOMDC15A20M200 K20K2K2008CYL6CYLTACHX105CYL4CYL8CYLOHMS15A11To measure Engine RPM (TACH) (see Fig.12):1. Insert BLACK test

250V MAX15A MAXFUSEDCOMDC15AAUTO POWER OFFCP7678®OFF200202DC V200 m20M200 K20K2K2008CYL6CYLTACHX105CYL4CYL8CYL6CYL5CYL4CYLDWELLDUTYCYCLE

250V MAX15A MAXFUSEDCOMDC15A20M200 K20K2K2008CYL6CYLTACHX105CYL4CYL8CYLOHMS15A250V MAX15A MAXFUSEDDC15A20M200 K20K2K2008CYL6CYLTACHX105CY

250V MAX15A MAXFUSEDDC15A20M200 K20K2K2008CYL6CYLTACHX105CYL4CYL8CYLOHMS15ACOM• If you hear tone - The switch is closed.• If you don’t hear ton

250V MAX15A MAXFUSEDCOMDC15AAUTO POWER OFFCP7678®OFF200202DC V200 m20M200 K20K2K2008CYL6CYLTACHX105CYL4CYL8CYL6CYL5CYL4CYLDWELLDUTYCYCLE

250V MAX15A MAXFUSEDCOMDC15A200 K20K2K2008CYL6CYLTACHX105CYL4CYLOHMS15AEngine Off Battery Current Draw16Fig. 19BlackRed2. Insert BLACK test lea

250V MAX15A MAXFUSEDCOMDC15AAUTO POWER OFFCP7678®OFF200202DC V200 m20M200 K20K2K2008CYL6CYLTACHX105CYL4CYL8CYL6CYL5CYL4CYLDWELLDUTYCYCLE

1102456 87798962453318Voltage Drops5. Turn multimeter rotary switch to 200mVDC range.If multimeter overranges, turn multimeterrotary switch to the 2V

250V MAX15A MAXFUSEDCOMDC15AAUTO POWER OFFCP7678®OFF200202DC V200 m20M200 K20K2K2008CYL6CYLTACHX105CYL4CYL8CYL6CYL5CYL4CYLDWELLDUTYCYCLE

SAFETY GUIDELINESTO PREVENT ACCIDENTS THAT COULD RESULT IN SERIOUS INJURYAND/OR DAMAGE TO YOUR VEHICLE OR TEST EQUIPMENT, CAREFULLYFOLLOW THESE SAFETY

250V MAX15A MAXFUSEDCOMDC15A20M200 K20K2K2008CYL6CYLTACHX105CYL4CYL8CYLOHMS15A250V MAX15A MAXFUSEDCOMDC15A20M200 K20K2K2008CYL6CYLTACHX10

2110.Turn multimeter rotary switch to 200KΩrange (see Fig. 24).11.Move RED test lead to secondary igni-tion coil terminal.• Refer to vehicle service m

250V MAX15A MAXFUSEDCOMDC15A20M200 K20K2K2008CYL6CYLTACHX105CYL4CYL8CYLOHMS15A22Ignition System WiresThis test measures the resistance of spark

9V250V MAX15A MAXFUSEDCOMDC15A20M200 K20K2K2008CYL6CYLTACHX105CYL4CYL8CYLOHMS15A23Hall Effect Sensors/SwitchesHall Effect sensors are used when

250V MAX15A MAXFUSEDCOMDC15A20M200 K20K2K2008CYL6CYLTACHX105CYL4CYL8CYLOHMS15AMagnetic Pick-Up Coils – Reluctance Sensors24Reluctance sensors a

250V MAX15A MAXFUSEDCOMDC15A20M200 K20K2K2008CYL6CYLTACHX105CYL4CYL8CYLOHMS15AIgnition Coil Switching Action25This test checks to see if the ne

26Fuel System TestingThe requirements for lower vehicle emissions has in-creased the need for more precise engine fuel control. Automanufacturers bega

250V MAX15A MAXFUSEDCOMDC15A20M200 K20K2K2008CYL6CYLTACHX105CYL4CYL8CYLOHMS15A27Measuring Fuel Injector ResistanceFuel injectors are similar to

250V MAX15A MAXFUSEDCOMDC15AOFF200202DC V200 m20M200 K20K2K2008CYL6CYLTACHX105CYL4CYL8CYL6CYL5CYL4CYLDWELLDUTYCYCLE %OHMS°15A28Testing

29• Connect BLACK test lead to remainingheater pin.• Turn multimeter rotary switch to 200Ωrange.• View reading on display.• Compare reading to manufac

3Vehicle Service Manual – Sources For Service InformationThe following is a list of sources to obtain vehicle service information for your specific ve

Temperature Type Sensors301. If engine is HOT let it COOL down be-fore proceeding.Make sure all engine and transmissionfluids are at outside air tempe

250V MAX15A MAXFUSEDCOMDC15A20M200 K20K2K2008CYL6CYLTACHX105CYL4CYL8CYLOHMS15A31Position Type SensorsPosition sensors are potentiometers or a t

EGR Valve Position• Remove vacuum hose from EGR valve.• Connect hand vacuum pump to EGRvalve.• Gradually apply vacuum to slowly openvalve. (Typically,

333. Disconnect wiring harness and vacuumline from MAP sensor.4. Connect jumper wire between Pin A onwiring harness and sensor.5. Connect another jump

250V MAX15A MAXFUSEDCOMDC15AAUTO POWER OFFCP7678®OFF200202DC V200 m20M200 K20K2K2008CYL6CYLTACHX105CYL4CYL8CYL6CYL5CYL4CYLDWELLDUTYCYCLE

35• Display reading should...- increase in voltage from Key On En-gine OFF for DC type MAF sensors.- increase in RPM from Key On EngineOFF for Low Fre

36®Actron Manufacturing Co.9999 Walford AvenueCleveland, Ohio 44102-4696©1996, Actron Manufacturing CompanySunpro is a registered trademark of Sun Ele

250V MAX15A MAXFUSEDCOMDC15AAUTO POWER OFFCP7678®OFF200202DC V200 m20M200 K20K2K2008CYL6CYLTACHX105CYL4CYL8CYL6CYL5CYL4CYLDWELLDUTYCYCLE

Functions and Display Definitions1. ROTARY SWITCHSwitch is rotated to turn multimeter ON/OFF and select a function.2. DC VOLTSThis function is used fo

250V MAX15A MAXFUSEDCOMDC15AAUTO POWER OFFCP7678®OFF200202DC V200 m20M200 K20K2K2008CYL6CYLTACHX105CYL4CYL8CYL6CYL5CYL4CYLDWELLDUTYCYCLE

250V MAX15A MAXFUSEDCOMDC15AAUTO POWER OFFCP7678®OFF200202DC V200 m20M200 K20K2K2008CYL6CYLTACHX105CYL4CYL8CYL6CYL5CYL4CYLDWELLDUTYCYCLE

250V MAX15A MAXFUSEDCOMDC15A200 K20K2K2008CYL6CYLTACHX105CYL4CYLOHMS15A250V MAX15A MAXFUSEDCOMDC15AAUTO POWER OFFCP7678®OFF200202DC V200 m2

250V MAX15A MAXFUSEDCOMDC15A20M200 K20K2K2008CYL6CYLTACHX105CYL4CYL8CYLOHMS15A9Display should read typically 0.2Ω to 1.5Ω.If display reading wa