Xterra 2WD V6-4.0L (VQ40DE) (2006)
Water Intrusion
The incident may occur only during high humidity or in rainy/snowy weather. In such cases the incident could be caused by water intrusion on an
electrical part. This can be simulated by soaking the car or running it through a car wash.
Do not spray water directly on any electrical components.
Electrical Load
The incident may be electrical load sensitive. Perform diagnosis with all accessories (including A/C, rear window defogger, radio, fog lamps) turned on.
Cold or Hot Start Up
On some occasions an electrical incident may occur only when the car is started cold, or it may occur when the car is restarted hot shortly after being
turned off. In these cases you may have to keep the car overnight to make a proper diagnosis.
CIRCUIT INSPECTION
Introduction
In general, testing electrical circuits is an easy task if it is approached in a logical and organized method.
Before beginning it is important to have all available information on the system to be tested. Also, get a thorough understanding of system operation.
Then you will be able to use the appropriate equipment and follow the correct test procedure.
You may have to simulate vehicle vibrations while testing electrical components. Gently shake the wiring harness or electrical component to do this.
NOTE: Refer to "How to Check Terminal" to probe or check terminal.