Infiniti M35/M45 Y50. Manual - part 793

SERVICE INFORMATION FOR ELECTRICAL INCIDENT

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SERVICE INFORMATION FOR ELECTRICAL INCIDENT

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How to Check Terminal 

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CONNECTOR AND TERMINAL PIN KIT

Use the connector and terminal pin kits listed below when replacing connectors or terminals.
The connector and terminal pin kits contain some of the most commonly used NISSAN/INFINITI connectors
and terminals. For detailed connector and terminal pin replacement procedures, refer to the latest NISSAN/
INFINITI CONNECTOR AND TERMINAL PIN SERVICE MANUAL.

HOW TO PROBE CONNECTORS

Connector damage and an intermittent connection can result from improperly probing of the connector during
circuit checks.
The probe of a digital multimeter (DMM) may not correctly fit the connector cavity. To correctly probe the con-
nector, follow the procedures below using a “T” pin. For the best contact grasp the “T” pin using an alligator
clip.

Probing from Harness Side 

Standard type (not waterproof type) connector should be probed
from harness side with “T” pin.

●

If the connector has a rear cover such as a ECM connector,
remove the rear cover before probing the terminal.

●

Do not probe waterproof connector from harness side. Damage
to the seal between wire and connector may result.

Probing from Terminal Side 

FEMALE TERMINAL

●

There is a small notch above each female terminal. Probe each
terminal with the “T” pin through the notch.
Do not insert any object other than the same type male terminal
into female terminal.

Tool number

(Kent-Moore No.)

Tool name

Description

-
(J38751-95NI)
Connector and terminal 
pin kit (NISSAN)
-
(J38751-95INF)
Connector and terminal 
pin kit (INFINITI) 
-
(J42992-98KIT)
OBD and terminal repair 
kit
-
(J42992-2000UPD)
OBD-II Connector Kit 
Update

WAIA0004E

WAIA0005E

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SERVICE INFORMATION FOR ELECTRICAL INCIDENT

●

Some connectors do not have a notch above each terminal. To
probe each terminal, remove the connector retainer to make
contact space for probing.

MALE TERMINAL
Carefully probe the contact surface of each terminal using a “T” pin.
Do not bend terminal.

How to Check Enlarged Contact Spring of Terminal 

An enlarged contact spring of a terminal may create intermittent signals in the circuit.
If the intermittent open circuit occurs, follow the procedure below to inspect for open wires and enlarged con-
tact spring of female terminal.

1.

Assemble a male terminal and approx. 10 cm (3.9 in) of wire.
Use a male terminal which matches the female terminal.

2.

Disconnect the suspected faulty connector and hold it terminal
side up.

3.

While holding the wire of the male terminal, try to insert the male
terminal into the female terminal.
Do not force the male terminal into the female terminal with
your hands.

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SERVICE INFORMATION FOR ELECTRICAL INCIDENT

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4.

While moving the connector, check whether the male terminal
can be easily inserted or not.

●

If the male terminal can be easily inserted into the female termi-
nal, replace the female terminal.

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 specifications.

●

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 connector.
An unlocked terminal may create intermittent signals in the circuit.

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SERVICE INFORMATION FOR ELECTRICAL INCIDENT

How to Perform Efficient Diagnosis for an Electrical Incident

NAS0007Q

WORK FLOW

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 fol-
lowing 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

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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/Transaxle 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 cannot be duplicated, refer to “Incident Simulation Tests”.

STEP 3

Get the proper diagnosis materials together including:

●

Power Supply Routing

●

System Operation Descriptions

●

Applicable Service Manual Sections

●

Check for any Service Bulletins

Identify where to begin diagnosis based upon your knowledge of the system operation and the customer comments.

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 Harness 
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 inad-
vertently created a new incident during your diagnosis or repair steps.