Infiniti G20 (P11). Manual - part 409

NCGI0004

Connector and Terminal Pin Kit

NCGI0004S01

Use the connector and terminal pin kit listed below when replacing
connectors or terminals.
The connector and terminal pin kit contains some of the most
commonly used INFINITI connectors and terminals.

Tool number
(Kent-Moore No.)
Tool name

Description

—
(J38751-95INF)
Connector and terminal
pin kit
—
(J42992-98KIT)
OBD Terminal Repair Kit

SGI109A

How to Probe Connectors

NCGI0004S02

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 connector, follow the pro-
cedures below using a “T” pin. For the best contact grasp the “T”
pin using an alligator clip.

SGI841

PROBING FROM HARNESS SIDE

NCGI0004S0201

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 ter-
minal.

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

SEL265V

PROBING FROM TERMINAL SIDE

NCGI0004S0202

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.

IDX

HOW TO CHECK TERMINAL

Connector and Terminal Pin Kit

GI-21

SEL266V

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

SEL267V

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

NCGI0004S03

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 contact spring of female
terminal.

SEL270V

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

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

SEL271V

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.

HOW TO CHECK TERMINAL

How to Probe Connectors (Cont’d)

GI-22

SEL272V

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

SEL273V

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

SEL275V

Waterproof Connector Inspection

NCGI0004S04

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 char-
acteristics.

RUBBER SEAL INSPECTION

NCGI0004S0401

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 specifica-
tions.

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

NCGI0004S0402

The wire seal must be installed on the wire insertion area of a
waterproof connector. Be sure that the seal is installed properly.

SEL330V

Terminal Lock Inspection

NCGI0004S05

Check for unlocked terminals by pulling wire at the end of connec-
tor. An unlocked terminal may create intermittent signals in the
circuit.

IDX

HOW TO CHECK TERMINAL

How to Check Enlarged Contact Spring of Terminal (Cont’d)

GI-23

NCGI0005

Work Flow

NCGI0005S01

SGI838

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
Check for any Service Bulletin.
Identify where to begin diagnosis based upon your knowledge of the system operation and the cus-
tomer 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 inadvertently created a new incident during your diagnosis or repair steps.

HOW TO PERFORM EFFICIENT DIAGNOSIS FOR AN ELECTRICAL INCIDENT

Work Flow

GI-24

Content .. 407 408 409 410 ..