Nissan Primera P11. Manual — part 454
Waterproof Connector Inspection
If water enters the connector, it can short interior circuits. This
may lead to intermittent problems.
Check the following items to maintain the original waterproof
characteristics.
RUBBER SEAL INSPECTION
●
Most waterproof connectors are provided with a rubber seal
between the male and female connectors. If the seal is
missing, the waterproof performance may not meet specifi-
cations.
●
The rubber seal may come off when connectors are discon-
nected. Whenever connectors are reconnected, make sure
the rubber seal is properly installed on either side of male or
female connector.
WIRE SEAL INSPECTION
The wire seal must be installed on the wire insertion area of a
waterproof connector. Be sure that the seal is installed properly.
Terminal Lock Inspection
Check for unlocked terminals by pulling wire at the end of con-
nector. An unlocked terminal may create intermittent signals in
the circuit.
SEL275V
Wire seal
Connector housing
Rubber seal
SEL330V
Locked terminal
Unlocked terminal
Intermittent contact
Male connector
Female connector
HOW TO CHECK TERMINAL
GI-23
Work Flow
STEP
DESCRIPTION
STEP 1
Get detailed information about the conditions and the environment when the incident occurred.
The following are key pieces of information required to make a good analysis:
WHAT
Vehicle Model, Engine, Transmission and the System (i.e. Radio).
WHEN
Date, Time of Day, Weather Conditions, Frequency.
WHERE
Road Conditions, Altitude and Traffic Situation.
HOW
System Symptoms, Operating Conditions (Other Components Interaction).
Service History and if any After Market Accessories have been installed.
STEP 2
Operate the system, road test if necessary.
Verify the parameter of the incident.
If the problem can not be duplicated, refer to “Incident Simulation Tests” next page.
STEP 3
Get the proper diagnosis materials together including:
POWER SUPPLY ROUTING
System Operation Descriptions
Applicable Service Manual Sections
Identify where to begin diagnosis based upon your knowledge of the system operation and the customer com-
ments.
STEP 4
Inspect the system for mechanical binding, loose connectors or wiring damage.
Determine which circuits and components are involved and diagnose using the Power Supply Routing and Har-
ness Layouts.
STEP 5
Repair or replace the incident circuit or component.
STEP 6
Operate the system in all modes. Verify the system works properly under all conditions. Make sure you have not
inadvertently created a new incident during your diagnosis or repair steps.
SGI838
START
LISTEN TO CUSTOMER COMPLAINTS
VERIFY THE SYMPTOM
SYMPTOM SIMULATION
NARROW THE POSSIBLE CAUSE
INSPECT THE CIRCUIT
REPAIR THE CIRCUIT
MAKE SURE THE CIRCUIT WORKS
END
STEP 1
STEP 2
STEP 3
STEP 4
STEP 5
STEP 6
HOW TO PERFORM EFFICIENT DIAGNOSIS
FOR AN ELECTRICAL INCIDENT
GI-24
Incident Simulation Tests
INTRODUCTION
Sometimes the symptom is not present when the vehicle is brought in for service. If possible, re-create the
conditions present at the time of the incident. 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:
●
Vehicle vibration
●
Heat sensitive
●
Freezing
●
Water intrusion
●
Electrical load
●
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
The problem may occur or become worse while driving on a rough road or when engine is vibrating (idle
with A/C on). In such a case, you will want to check for a vibration related condition. Refer to the illustration
below.
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 ter-
minals. 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.
SGI839
Vibration test
Shake gently.
Bend gently.
Tap gently.
HOW TO PERFORM EFFICIENT DIAGNOSIS
FOR AN ELECTRICAL INCIDENT
GI-25
Tester probe
When probing a connector it is possible to enlarge the contact
spring opening. If this occurs it may create an intermittent signal
in the circuit. When probing a connector, use care not to enlarge
the opening. The probe of the Digital Multimeter (DMM) may not
fit into the connector cavity. In such cases make an extension of
a “T” pin and probe it from the harness side of the connector.
Most DMMs have accessory alligator clips. Slide these over the
probe to allow clipping the “T” pin for a better contact. If you have
any difficulty probing a terminal, inspect the terminal. Ensure you
have not accidentally opened the contact spring or pulled a wire
loose.
SGI840
Possible cause
Any probe entering the
terminal may enlarge
the contact spring
opening creating an
intermittent signal.
Enlarged
Normal
Proper crimp
Insulation not
removed
Intermittent
signals
through
pierced
insulation
Wire strands
missing
DEFORMED (ENLARGED) FEMALE TERMINALS
DEFECTIVE INSULATION STRIPPING
Male half
Female half
Seal
Seal
Unlocked terminal
(Hidden by wire seal)
Intermittent
contact
Check for unlocked terminals by
pulling each wire at the end of
the connector.
TERMINAL NOT PROPERLY SEATED
Locked terminal
Loose
SGI841
Connector
“T” pin
Alligator clip
DMM
HOW TO PERFORM EFFICIENT DIAGNOSIS
FOR AN ELECTRICAL INCIDENT
Incident Simulation Tests (Cont’d)
GI-26
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст