95XJ_8WL.PDF

(7776 KB) Pobierz
J
WIRING DIAGRAMS—GENERAL INFORMATION
8W - 1
WIRING DIAGRAMS—GENERAL INFORMATION
INDEX
page
Circuit Identification . . . . . . . . . . . . . . . . . . . . .
Connector and Terminal Replacement . . . . . . .
Connector Replacement . . . . . . . . . . . . . . . . .
Connectors . . . . . . . . . . . . . . . . . . . . . . . . . . .
Diode Replacement . . . . . . . . . . . . . . . . . . . .
Electrostatic Discharge (ESC) Sensitive Devices
General Information . . . . . . . . . . . . . . . . . . . . .
Intermittent and Poor Connections . . . . . . . . . .
Notes, Cautions, and Warnings . . . . . . . . . . . .
.
.
.
.
.
.
..
..
..
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
.
1
7
6
2
8
2
1
4
1
Symbols . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Take Outs . . . . . . . . . . . . . . . . . . . . . . . . . . .
Terminal Replacement . . . . . . . . . . . . . . . . . .
Terminal/Connector Repair—Molex Connectors
Troubleshooting Tests . . . . . . . . . . . . . . . . . .
Troubleshooting Tools . . . . . . . . . . . . . . . . . .
Troubleshooting Wiring Problems . . . . . . . . .
Wire Code Identification . . . . . . . . . . . . . . . .
Wiring Repair . . . . . . . . . . . . . . . . . . . . . . . .
page
....
....
....
...
....
....
....
....
....
.
.
.
.
.
.
.
.
.
2
2
8
6
4
4
5
1
6
GENERAL INFORMATION
This Group is divided into three stand alone sec-
tions; XJ, YJ, and XJ Right Hand Drive (XJ-RHD).
Separate circuit descriptions and wiring diagrams are
provided for each vehicle. Each section contains a
Contents list for the wiring diagrams and circuit de-
scriptions for that vehicle.
The complete XJ circuit descriptions and diagrams
are printed first, followed by those for the YJ and
then the XJ-RHD. The heading at the top of each
page identifies the vehicle covered in the section.
SET THE PARKING BRAKE WHEN WORKING ON
ANY VEHICLE. AN AUTOMATIC TRANSMISSION
SHOULD BE IN PARK. A MANUAL TRANSMISSION
SHOULD BE IN NEUTRAL.
OPERATE THE ENGINE ONLY IN A WELL-VENTI-
LATED AREA.
KEEP AWAY FROM MOVING PARTS WHEN THE EN-
GINE IS RUNNING, ESPECIALLY THE FAN AND BELTS.
TO PREVENT SERIOUS BURNS, AVOID CONTACT
WITH HOT PARTS SUCH AS THE RADIATOR, EX-
HAUST MANIFOLD(S), TAIL PIPE, CATALYTIC CON-
VERTER, AND MUFFLER.
DO NOT ALLOW FLAME OR SPARKS NEAR THE
BATTERY. GASES ARE ALWAYS PRESENT IN AND
AROUND THE BATTERY.
ALWAYS REMOVE RINGS, WATCHES, LOOSE
HANGING JEWELRY, AND LOOSE CLOTHING.
NOTES, CAUTIONS, and WARNINGS
Throughout this group additional important infor-
mation is presented in three ways; Notes, Cautions,
and Warnings.
NOTES
are used to help describe how switches or
components operate to complete a particular circuit.
They are also used to indicate different conditions
that may appear on the vehicle. For example, an
up-to and after condition.
CAUTIONS
are used to indicate information that
could prevent making an error that may damage the
vehicle.
WARNINGS
provide information to prevent per-
sonal injury and vehicle damage. Below is a list of
general warnings that should be followed any time a
vehicle is being serviced.
ALWAYS WEAR SAFETY GLASSES FOR EYE PRO-
TECTION.
USE SAFETY STANDS ANYTIME A PROCEDURE RE-
QUIRES BEING UNDER A VEHICLE.
BE SURE THAT THE IGNITION SWITCH ALWAYS IS
IN THE OFF POSITION, UNLESS THE PROCEDURE
REQUIRES IT TO BE ON.
WIRE CODE IDENTIFICATION
Each wire shown in the diagrams contains a code
(Fig. 1) which identifies the main circuit, part of the
main circuit, gauge of wire, and color. The color is
shown as a two letter code which can be identified by
referring to the Wire Color Code Chart (Fig. 2).
CIRCUIT IDENTIFICATION
All circuits in the diagrams use an alpha/numeric
code to identify the wire and its function (Fig. 3). To
identify which circuit code applies to a system, refer
to the Circuit Identification Code Chart. This chart
shows the main circuits only and does not show the
secondary codes that may apply to some models.
8W - 2
WIRING DIAGRAMS—GENERAL INFORMATION
J
Fig. 1 Wire Color Code Identification
Fig. 3 Circuit Identification
Fig. 2 Wire Color Code Chart
CONNECTORS
Connectors shown in the diagrams are identified
using the international standard arrows for male and
female terminals (Fig. 4). A connector identifier is
placed next to the arrows to indicate the connector
number (Fig. 4).
For viewing connector pin outs, with two terminals
or greater, refer to section 8W-80. This section identi-
fies the connector by number and provides terminal
numbering, circuit identification, wire colors, and
functions.
All connectors are viewed from the terminal end un-
less otherwise specified. To find the connector location in
the vehicle refer to section 8W-90. This section uses the
connector identification number from the wiring dia-
grams to provide a figure number reference.
Fig. 4 Connector Identification
TAKE OUTS
The abbreviation T/O is used in the component
location section to indicate a point in which the wir-
ing harness branches out to a component.
SYMBOLS
Various symbols are used throughout the Wiring
Diagrams. These symbols can be identified by refer-
ring to the symbol identification chart (Fig. 5).
ELECTROSTATIC DISCHARGE (ESD) SENSITIVE
DEVICES
All ESD sensitive components are solid state and a
symbol (Fig. 6) is used to indicate this. When han-
dling any component with this symbol, comply with
J
WIRING DIAGRAMS—GENERAL INFORMATION
8W - 3
Fig. 5 Symbol Identification
8W - 4
WIRING DIAGRAMS—GENERAL INFORMATION
J
the following procedures to reduce the possibility of
electrostatic charge build up on the body and inad-
vertent discharge into the component. If it is not
known whether the part is ESD sensitive, assume
that it is.
(1) Always touch a known good ground before han-
dling the part. This should be repeated while han-
dling the part and more frequently after sliding
across a seat, sitting down from a standing position,
or walking a distance.
(2) Avoid touching electrical terminals of the part,
unless instructed to do so by a written diagnostic
procedure.
(3) When using a voltmeter, be sure to connect the
ground lead first.
(4) Do not remove the part from its protective pack-
ing until it is time to install the part.
(5) Before removing the part from its package,
ground the package to a known good ground on the
vehicle.
CAUTION: - Most of the electrical components used
in today’s vehicle are Solid State. When checking
resistance in these circuits use a meter with a 10-
megohm or greater impedance. In addition, make
sure the power is disconnected from the circuit.
Circuits that are powered up by the vehicle electrical
system can cause damage to the equipment and
provide false readings.
•
Probing Tools - These tools are used for probing
terminals in connectors (Fig. 7). Select the proper size
tool from Special Tool Package 6807, and insert it into
the terminal being tested. Use the other end of the
tool to insert the meter probe.
Fig. 7 Probing Tool
INTERMITTENT AND POOR CONNECTIONS
Fig. 6 Electrostatic Discharge Symbol
Most intermittent electrical problems are caused by
faulty electrical connections or wiring. It is also pos-
sible for a sticking component or relay to cause a
problem. Before condemning a component or wiring
assembly check the following items.
•
Connectors are fully seated
•
Spread terminals, or terminal push out
•
Terminals in the wiring assembly are fully seated
into the connector/component and locked in position
•
Dirt or corrosion on the terminals. Any amount of
corrosion or dirt could cause an intermittent problem
•
Damaged connector/component casing exposing the
item to dirt and moisture
•
Wire insulation that has rubbed through causing a
short to ground
•
Wiring broke inside of the insulation
TROUBLESHOOTING TOOLS
When diagnosing a problem in an electrical circuit
there are several common tools necessary. These tools
are listed and explained below.
•
Jumper Wire - This is a test wire used to connect
two points of a circuit. It can be used to bypass an
open in a circuit.
WARNING: NEVER USE A JUMPER WIRE ACROSS A
LOAD, SUCH AS A MOTOR, CONNECTED BETWEEN
A BATTERY FEED AND GROUND.
•
Voltmeter - Used to check for voltage on a circuit.
Always connect the black lead to a known good
ground and the red lead to the positive side of the
circuit.
CAUTION: Most of the electrical components used
in today’s vehicle are solid state. When checking
voltages in these circuits use a meter with a 10-
megohm or greater impedance.
•
Ohmmeter - Used to check the resistance between
two points of a circuit. Low or no resistance in a
circuit means good continuity.
TROUBLESHOOTING TESTS
Before beginning any tests on a vehicle’s electrical
system, use the Wiring Diagrams and study the cir-
cuit. Also refer to the Troubleshooting Wiring Prob-
lems section in this section.
TESTING FOR VOLTAGE
(1) Connect the ground lead of a voltmeter to a
known good ground (Fig. 8).
J
WIRING DIAGRAMS—GENERAL INFORMATION
8W - 5
(2) Connect the other lead of the voltmeter to the
selected test point. The vehicle ignition may need to
be turned ON to check voltage. Refer to the appropri-
ate test procedure.
Fig. 9 Testing for Continuity
(4) Start connecting the items in the fuse circuit
one at a time. When the fuse blows the circuit with
the short to ground has been isolated.
Fig. 8 Testing for Voltage
TESTING FOR CONTINUITY
(1) Remove the fuse for the circuit being checked or,
disconnect the battery.
(2) Connect one lead of the ohmmeter to one side of
the circuit being tested (Fig. 9).
(3) Connect the other lead to the other end of the
circuit being tested. Low or no resistance means good
continuity.
TESTING FOR A SHORT TO GROUND
(1) Remove the fuse and disconnect all items in-
volved with the fuse.
(2) Connect a test light or a voltmeter across the
terminals of the fuse.
(3) Starting at the fuse block, wiggle the wiring
harness about six to eight inches apart and watch the
voltmeter/test lamp.
(4) If the voltmeter registers voltage or the test
lamp glows, there is a short to ground in that general
area of the wiring harness.
TESTING FOR A SHORT TO GROUND ON
FUSES POWERING SEVERAL LOADS
(1) Refer to the wiring diagrams and disconnect or
isolate all items on the fused circuit.
(2) Replace the blown fuse.
(3) Supply power to the fuse by turning ON the
ignition switch or re-connecting the battery.
TESTING FOR A VOLTAGE DROP
(1) Connect the positive lead of the voltmeter to the
side of the circuit closest to the battery (Fig. 10).
(2) Connect the other lead of the voltmeter to the
other side of the switch or component.
(3) Operate the item.
(4) The voltmeter will show the difference in volt-
age between the two points.
TROUBLESHOOTING WIRING PROBLEMS
When troubleshooting wiring problems there are six
steps which can aid in the procedure. The steps are
listed and explained below. Always check for non-
factory items added to the vehicle before doing any
diagnosis. If the vehicle is equipped with these items,
disconnect them to verify these add-on items are not
the cause of the problem.
(1) Verify the problem.
(2) Verify any related symptoms. Do this by per-
forming operational checks on components that are in
the same circuit. Refer to the wiring diagrams.
(3) Analyze the symptoms. Use the wiring dia-
grams to determine what the circuit is doing, where
the problem most likely is occurring and where the
diagnosis will continue.
(4) Isolate the problem area.
(5) Repair the problem.
(6) Verify proper operation. For this step, check for
proper operation of all items on the repaired circuit.
Refer to the wiring diagrams.

Plik z chomika:

Inne pliki z tego folderu:

Inne foldery tego chomika:

Zgłoś jeśli naruszono regulamin