Uplander FWD V6-3.5L VIN L (2006)
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Poor connection between the male and female terminal at a connector
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Poor terminal to wire connection-Some conditions which fall under this description are poor crimps, poor solder joints, crimping over the wire
insulation rather than the wire itself, and corrosion in the wire to terminal contact area, etc.
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Pierced or damaged insulation can allow moisture to enter the wiring causing corrosion. The conductor can corrode inside the insulation, with little
visible evidence. Look for swollen and stiff sections of wire in the suspect circuits.
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Wiring which has been pinched, cut, or its insulation rubbed through may cause an intermittent open or short as the bare area touches other wiring
or parts of the vehicle.
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Wiring that comes in contact with hot or exhaust components
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Refer to Inducing Intermittent Fault Conditions in order to duplicate the conditions required, in order to verify the customer concern.
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Refer to Testing for Electrical Intermittents for test procedures to detect intermittent open, high resistance, short to ground, and short to voltage
conditions.
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Refer to Scan Tool Snapshot Procedure for advanced intermittent diagnosis and Vehicle Data Recorder operation.
TESTING FOR PROPER TERMINAL CONTACT
It is important to test terminal contact at the component and any inline connectors before replacing a suspect component. Mating terminals must be
inspected to ensure good terminal contact. A poor connection between the male and female terminal at a connector may be the result of contamination
or deformation.
Contamination may be caused by the connector halves being improperly connected. A missing or damaged connector seal, damage to the connector
itself, or exposing the terminals to moisture and dirt can also cause contamination. Contamination, usually in the underhood or underbody connectors,
leads to terminal corrosion, causing an open circuit or intermittently open circuit.
Deformation is caused by probing the mating side of a connector terminal without the proper adapter. Always use the J 35616 when probing
connectors. Other causes of terminal deformation are improperly joining the connector halves, or repeatedly separating and joining the connector
halves. Deformation, usually to the female terminal contact tang, can result in poor terminal contact causing an open or intermittently open circuit.
ROUND WIRE CONNECTORS
Follow the procedure below to test terminal contact of Metri-Pack or 56 series terminals. Refer to the J-38125 or the J 38125-4 Instruction data for
terminal identification.
Follow the procedure below in order to test terminal contact:
1. Separate the connector halves.
2. Visually inspect the connector halves for contamination. Contamination may result in a white or green build-up within the connector body or
between terminals. This causes high terminal resistance, intermittent contact, or an open circuit. An underhood or underbody connector that shows
signs of contamination should be replaced in its entirety: terminals, seals, and connector body.
3. Using an equivalent male terminal from the J-38125 , test that the retention force is significantly different between a good terminal and a suspect
terminal. Replace the female terminal in question.
CONTROL MODULE/COMPONENT VOLTAGE AND GROUNDS
Poor voltage or ground connections can cause widely varying symptoms.
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Test all control module voltage supply circuits. Many vehicles have multiple circuits supplying voltage to a control module. Other components in
the system may have separate voltage supply circuits that may also need to be tested. Inspect connections at the module/component connectors,
fuses, and any intermediate connections between the voltage source and the module/component. A test lamp or a DMM may indicate that voltage
is present, but neither tests the ability of the circuit to carry sufficient current. Ensure that the circuit can carry the current necessary to operate the
component. Refer to Circuit Testing and Power Distribution Schematics.
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Test all control module ground and system ground circuits. The control module may have multiple ground circuits. Other components in the
system may have separate grounds that may also need to be tested. Inspect grounds for clean and tight connections at the grounding point. Inspect
the connections at the component and in splice packs, where applicable. Ensure that the circuit can carry the current necessary to operate the
component. Refer to Circuit Testing and Ground Distribution Schematics.
TEMPERATURE SENSITIVITY
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An intermittent condition may occur when a component/connection reaches normal operating temperature. The condition may occur only when the
component/connection is cold, or only when the component/connection is hot.
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Freeze Frame, Failure Records, Snapshot, or Vehicle Data Recorder data may help with this type of intermittent condition, where applicable.
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If the intermittent is related to heat, review the data for a relationship with the following:
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High ambient temperatures
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Underhood/engine generated heat
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Circuit generated heat due to a poor connection, or high electrical load
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Higher than normal load conditions, towing, etc.
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If the intermittent is related to cold, review the data for the following:
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Low ambient temperatures-In extremely low temperatures, ice may form in a connection or component. Inspect for water intrusion.
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The condition only occurs on a cold start.
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The condition goes away when the vehicle warms up.
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Information from the customer may help to determine if the trouble follows a pattern that is temperature related.
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If temperature is suspected of causing an intermittent fault condition, attempt to duplicate the condition. Refer to Inducing Intermittent Fault
Conditions in order to duplicate the conditions required.