20-146
PC130-7
TESTING AND ADJUSTING
TESTING PROCEDURE FOR
DIODE
a
Test an assembled-type diode (18-pin) or a diode
(2-pin) according to the following procedure.
a
The conductive direction of an assembled-type
diode is shown in the following figure.
a
The conductive direction of a diode is marked on
its surface.
1. When using a digital circuit tester
1) Set the circuit tester in the diode range and
check the indicated value.
a
If an ordinary tester is used, the voltage
of the battery in itself is indicated.
2) Apply the red (+) test pin to the anode (P)
side of the diode and the black (-) test pin to
the cathode (N) side and read the indicated
value.
3) Judge the condition of the diode from the
indicated value.
•
The indicated value does not change:
There is not continuity (Defective).
•
The indicated value changes: There is
continuity (Normal) (Note).
Note) In the case of a silicon diode, the cir-
cuit tester indicates a value of 460 –
600.
2. When using an analog circuit tester
1) Set the circuit tester in the resistance range.
2) Apply the test pins as shown below and
check movement of the pointer.
i)
Apply the red (+) test pin to the anode (P)
side of the diode and the black (-) test pin
to the cathode (N) side.
ii)
Apply the red (+) test pin to the cathode
(N) side of the diode and the black (-) test
pin to the anode (P) side.
3) Judge the condition of the diode from move-
ment of the pointer.
•
The pointer does not move in i) above
but moves in ii): Normal (Moving angle
(Resistance) depends on the type and
measurement range of the circuit tester,
however)
•
The pointer moves in both i) and ii):
Defective (Internal short circuit)
•
The pointer does not move in either of i)
and ii): Defective (Internal disconnection)
TESTING PROCEDURE FOR DIODE
(1)
Содержание PC130-7
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Страница 93: ...PC130 7 20 203 TROUBLESHOOTING SEQUENCE OF EVENTS IN TROUBLESHOOTING 1 SEQUENCE OF EVENTS IN TROUBLESHOOTING...
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Страница 113: ...PC130 7 20 223 TROUBLESHOOTING CONNECTOR ARRANGEMENT DRAWING AND ELECTRIC CIRCUIT DIAGRAM OF EACH SYSTEM 1...
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Страница 161: ...PC130 7 20 313 TROUBLESHOOTING Circuit diagram related to wiper motor 112 1...
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Страница 165: ...PC130 7 20 317 TROUBLESHOOTING Circuit diagram related to windshield washer motor 114 1...
Страница 167: ...PC130 7 20 319 TROUBLESHOOTING Circuit diagram related to wiper motor 115 1...
Страница 169: ...PC130 7 20 321 TROUBLESHOOTING Circuit diagram related to wiper motor 116 1...
Страница 171: ...PC130 7 20 323 TROUBLESHOOTING Circuit diagram related to swing holding brake solenoid 203 1...
Страница 173: ...PC130 7 20 325 TROUBLESHOOTING Circuit diagram related to 2 stage relief solenoid 205 1...
Страница 175: ...PC130 7 20 327 TROUBLESHOOTING Circuit diagram related to travel speed shifting solenoid 206 1...
Страница 177: ...PC130 7 20 329 TROUBLESHOOTING Circuit diagram related to swing holding brake solenoid 213 1...
Страница 179: ...PC130 7 20 331 TROUBLESHOOTING Circuit diagram related to 2 stage relief solenoid 215 1...
Страница 181: ...PC130 7 20 333 TROUBLESHOOTING Circuit diagram related to travel speed shifting solenoid 216 1...
Страница 183: ...PC130 7 20 335 TROUBLESHOOTING Circuit diagram related to model selection connector 217 1...
Страница 185: ...PC130 7 20 337 TROUBLESHOOTING Circuit diagram related to S NET 218 1...
Страница 189: ...PC130 7 20 341 TROUBLESHOOTING Circuit diagram related to pump pressure sensor 224 1...
Страница 191: ...PC130 7 20 343 TROUBLESHOOTING Circuit diagram related to sensor power supply 226 1...
Страница 193: ...PC130 7 20 345 TROUBLESHOOTING Circuit diagram related to engine speed sensor 227 1...
Страница 195: ...PC130 7 20 347 TROUBLESHOOTING Circuit diagram related to PC EPC solenoid 232 1...
Страница 197: ...PC130 7 20 349 TROUBLESHOOTING Circuit diagram related to PC EPC solenoid 233 1...
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Страница 203: ...PC130 7 20 355 TROUBLESHOOTING Circuit diagram related to governor motor and potentiometer 306 1...
Страница 205: ...PC130 7 20 357 TROUBLESHOOTING Circuit diagram related to fuel control dial 308 1...
Страница 207: ...PC130 7 20 359 TROUBLESHOOTING Circuit diagram related to battery relay 315 1...
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Страница 211: ...PC130 7 20 363 TROUBLESHOOTING Circuit diagram related to governor motor and potentiometer 317 1...
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Страница 223: ...PC130 7 20 409 TROUBLESHOOTING Circuit diagram related to governor motor and potentiometer BWP13362 E 2 1...
Страница 233: ...PC130 7 20 419 TROUBLESHOOTING Circuit diagram related to PPC lock solenoid E 8 1...
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Страница 251: ...PC130 7 20 437 TROUBLESHOOTING Circuit diagram related to wiper motor and window rear limit switch E 20 1...
Страница 253: ...PC130 7 20 439 TROUBLESHOOTING Circuit diagram related to windshield washer motor E 20 1...
Страница 255: ...PC130 7 20 441 TROUBLESHOOTING Circuit diagram related to lower windshield wiper E 21 1...
Страница 257: ...PC130 7 20 443 TROUBLESHOOTING Circuit diagram related to caution buzzer stop switch E 22 1...
Страница 259: ...PC130 7 20 445 TROUBLESHOOTING Circuit diagram related to boom RAISE oil pressure switch E 23 1...
Страница 261: ...PC130 7 20 447 TROUBLESHOOTING Circuit diagram related to boom LOWER oil pressure switch E 24 1...
Страница 263: ...PC130 7 20 449 TROUBLESHOOTING Circuit diagram related to arm IN oil pressure switch E 25 1...
Страница 265: ...PC130 7 20 451 TROUBLESHOOTING Circuit diagram related to arm OUT oil pressure switch E 26 1...
Страница 267: ...PC130 7 20 453 TROUBLESHOOTING Circuit diagram related to bucket CURL oil pressure switch E 27 1...
Страница 269: ...PC130 7 20 455 TROUBLESHOOTING Circuit diagram related to bucket DUMP oil pressure switch E 28 1...
Страница 273: ...PC130 7 20 459 TROUBLESHOOTING Circuit diagram related to travel oil pressure switch and travel alarm E 30 1...
Страница 275: ...PC130 7 20 461 TROUBLESHOOTING Circuit diagram related to service 1 oil pressure switches front and rear E 31 1...
Страница 284: ...20 470 PC130 7 TROUBLESHOOTING Circuit diagram related to air conditioner E 32 1...
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