Actron SunPro CP7678 Operating Instructions Manual

Also see for SunPro CP7678: Operating instrucktions

Actron SunPro CP7678 Operating Instructions Manual Manual pdf 23 page image

9V250V MAX15A MAXFUSEDCOMDC15A20M200K20K2K 200 8CYL6CYL TACHX105CYL4CYL8CYLOHMS15A23Hall Effect Sensors/SwitchesHall Effect sensors are used whenever thevehicle computer needs to know speed andposition of a rotating object. Hall Effect sen-sors are commonly used in ignition systemsto determine camshaft and crankshaft posi-tion so the vehicle computer knows the opti-mum time to fire the ignition coil(s) and turn onthe fuel injectors. This test checks for properoperation of the Hall Effect sensor / switch.Test Procedure (see Fig. 26):1. Remove Hall Effect Sensor from ve-hicle.Refer to vehicle service manual for proce-dure.2. Connect 9V battery to sensor POWERand GROUND pins.• Connect positive(+) terminal of 9V bat-tery to sensor POWER pin.• Connect negative(-) terminal of 9V bat-tery to sensor GROUND pin.• Refer to illustrations for POWER andGROUND pin locations.• For sensors not illustrated refer to ve-hicle service manual for pin locations.3. Insert BLACK test lead into COM testlead jack.4. Insert RED test lead into testlead jack.5. Connect RED test lead to sensor SIG-NAL pin.6. Connect BLACK test lead to 9V batterynegative(-) pin.7. Turn multimeter rotary switch to200 function.Multimeter should sound a tone.8. Slide a flat blade of iron or magneticsteel between sensor and magnet. (Usea scrap of sheet metal, knife blade, steelruler, etc.)• Multimeter tone should stop and displayshould overrange.• Remove steel blade and multimetershould again sound a tone.• It is O.K. if display changes erraticallyafter metal blade is removed.• Repeat several times to verify results.9. Test ResultsGood Sensor: Multimeter toggles fromtone to overrange as steel blade is in-serted and removed.Bad Sensor: No change in multimeter assteel blade is inserted and removed.Fig. 26RedPOWERSIGNALGROUNDSIGNAL POWERGROUND SIGNALSensorGROUNDJumperWiresBlack POWERMagnetIron orSteel BladeChrysler DistributorHall EffectFord DistributorHall EffectTypical HallEffect Sensor