Frontier XE King Cab 4WD V6-3.3L (VG33E) (2002)
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Doing so may help avoid a No Trouble Found Diagnosis. The following section illustrates ways to simulate the conditions/environment under which the
owner experiences an electrical incident.
The section is broken into the six following topics:
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Vehicle vibration
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Heat sensitive
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Freezing
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Water intrusion
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Electrical load
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Cold or hot start up
Get a thorough description of the incident from the customer. It is important for simulating the conditions of the problem.
Vehicle Vibration
VEHICLE VIBRATION
The problem may occur or become worse while driving on a rough road or when the engine is vibrating (idle with A/C on). In such a case, you will want
to check for a vibration-related condition.
Connectors & Harness
Determine which connectors and wiring harness would affect the electrical system you are inspecting.
Gently shake each connector and harness while monitoring the system for the incident you are trying to duplicate. This test may indicate a loose or poor
electrical connection.
HINT:
Connectors can be exposed to moisture. It is possible to get a thin film of corrosion on the connector terminals. A visual inspection may not
reveal this without disconnecting the connector. If the problem occurs intermittently, perhaps the problem is caused by corrosion. It is a good
idea to disconnect, inspect and clean the terminals on related connectors in the system.
Sensors & Relays
Gently apply a slight vibration to sensors and relays in the system you are inspecting.
This test may indicate a loose or poorly mounted sensor or relay.
Engine Compartment
There are several reasons a vehicle or engine vibration could cause an electrical complaint. Some of the things to check for
are:
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Connectors not fully seated.
-
Wiring harness not long enough and is being stressed due to engine vibrations or rocking.
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Wires laying across brackets or moving components.
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Loose, dirty or corroded ground wires.
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Wires routed too close to hot components.
