Cen N1240-3 Скачать руководство пользователя страница 7

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Page 7

TG0040A

Notes

Page 7

TG40B

If you have questions about your alternator or any of these test procedures, or if you need to locate a Factory Authorized Service Distributor, please contact us at:

C. E. Niehoff & Co.• 2021 Lee Street • Evanston, IL 60202 USA

TEL: 800.643.4633 USA and Canada • TEL: 847.866.6030 outside USA and Canada • FAX: 847.492.1242

E-mail us at [email protected]

Содержание N1240-3

Страница 1: ...reading obtained Be sure the meter leads touch source area only Prevent short circuit damage to test leads or source by not allowing meter leads to touch other pins or exposed wires in test area Be sure to use CEN tools designed especially for trou bleshooting CEN alternators when available Resistance ohm testing Set meter to proper scale Be sure to zero the meter scale or identify the meter burde...

Страница 2: ...egulator used with these units also is negative temperature compensated Setpoint is 28 8 0 5 V at 72 F when configured to operate with 6TMF type batteries provides overvoltage cutout OVCO Regulator will trip OVCO when system voltage rises above setpoint by 3 V for longer than 3 seconds OVCO feature detects high voltage and reacts by opening alternator field circuit and turning off alternator Resta...

Страница 3: ...or Circuit Identification A B C D E F G H J K J1939 J1939 J1939 SHLD B GND Mfr use only Mfr use only Mfr use only Ext Temp Sense Ext Voltage Sense unused Figure 3 J1939 Connector Pins Regulator Readout Expected Reading TABLE 2 N3218 Regulator J1939 Readout Diagnostics seeTable 3 Action If Expected Reading Not Present Alternator Speed Alternator Voltage Battery Voltage Regulator Temp Alternator Cur...

Страница 4: ...ING Shut down vehicle and restart engine If alternator functions normally after restart a no output condi tion was normal response of voltage regulator to overvoltage condition Inspect condition of electrical system If you have reset alternator once and electrical system returns to normal charge voltage condition there may have been a one time overvoltage spike that caused OVCO circuit to trip If ...

Страница 5: ...y off engine off Does battery voltage exist at alternator B terminal Yes No Repair vehicle harness circuit to B terminal on alternator T T T T T T T T T T Set DMM to diode test Check continuity of thermal switch and rear stator diodes Connect red lead to pin B in harness plug Connect black lead to alternator B terminal Meter should read one diode drop approx 0 6 to 0 9 V Disconnect leads Connect r...

Страница 6: ...in F in harness plug to alternator B terminal Touch shaft with steel tool to detect significant magnetism Is shaft magnetized Yes No Alternator is defective T T T T T Regulator is defective T T T T T T T T T T Yes No Alternator is defective T T T T T CONT D With DMM on resistance scale Connect red lead to pin E in harness plug Connect black lead to alternator B terminal Meter should read 0 ohms Ch...

Страница 7: ...of these test procedures or if you need to locate a Factory Authorized Service Distributor please contact us at C E Niehoff Co 2021 Lee Street Evanston IL 60202 USA TEL 800 643 4633 USA and Canada TEL 847 866 6030 outside USA and Canada FAX 847 492 1242 E mail us at service CENiehoff com ...

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