Nissan 100NX N14 silhouetteN14

TROUBLE DIAGNOSES — Diagnostic Procedure (Cont'd)

EF & EC-250prose procedure
Continued from EF & EC-249

Diagnostic Procedure (Cont'd)

  1. 7
    When measuring E.C.U. controlled components supply voltage with a circuit tester, separate one tester probe from the other. If the two tester probes accidentally make contact with each other during measurement, the circuit will be shorted, resulting in damage to the control unit power transistor.
    Cautionary cartoon illustration of measuring E.C.U. controlled component supply voltage. A solenoid valve harness connector is being probed by a circuit tester. One probe path through the E.C.U. is marked "N.G." and the other to ground is marked "O.K.". A "Short" with a spark symbol is shown where the two probes touch, and a startled technician with a "Battery voltage" speech bubble. Labels: Solenoid valve, Harness connector for solenoid valve, E.C.U., Circuit tester.
    SEF599D
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