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ELECTRICAL
320
8.18 GENERAL ELECTRICAL
INFORMATION:
This section is intended to assist in diagnosing the
electrical faults and should be used in conjunction
with the Electrical Circuit Diagrams.
The document is divided into the following
sections:
1. INTRODUCTION
- General information on how
to read the circuit diagram.
2. FUSE & RELAY BOX DETAILS
- provides
details of fuse & relay location, rating in Amperes
and circuit(s) protected.
3. SYMBOLS
- provides details about symbols
used in circuit diagram
4. CIRCUIT SCHMATICS
- provides details about
how each of the systems operates
5. GROUNDING TOPOLOGY
- provides details of
earth points, earth and power headers, including
a plan view of the vehicle to aid location.
6. INTERCONNECTION TOPOLOGY
– provides
details of interconnection connector including a
plan view of the vehicle to aid location.
7. WIRING HARNESS FITMENT DRAWING:
provides details about routing & connector
location in the vehicle
NOTE:
Before starting electrical checks on the vehicle,
ensure that the relevant mechanical functions
operate satisfactorily
.
! CAUTION
:
“LED or lamp flickering on Fascia Sw, Music
system, key barrel illumination, IC lamps flickering
or intermittent warning lamp on –off, grounding to
be checked (check earth points from respective
connection till Battery -ve on body and chassis
ground)”
For troubleshooting any electrical problem
please follow the below five steps
1. Verify the problem
Check the operation of circuit to
understand the problem. Do not begin
disassembling or testing until you have narrowed
down to the possible cause.
2. Analyze the circuit diagram (
schematic
)
Analyze the diagram. Check circuits that shares
wiring with problem circuit, the name of shared
circuits is often given on each circuit diagram to aid
troubleshooting, shared power & ground circuits
can be found in power & distribution circuits. Try to
operate the shared circuits. If these circuits work,
then the shared wiring is ok. The cause must be
within the wiring used only by problem circuit. If
several circuits fail at the same time, chances are
the either power or ground circuit faulty.
3. Find the cause
Narrow down the possible causes. Before you
replace the component check fuse, power &
ground wires at the component harness.
4. Repair the problem
Once the specific problem is identified, make the
repair. Be sure to use correct tools & safe
procedures.
5. Check the repair
Check the operation of the repaired circuit in all
modes to make sure you fixed the entire problem.
If the problem was the blown fuse be sure to test
all of the circuits on that fuse. Make sure no new
problem is created.
CAUTION:
LED or lamp flickering on Fascia Switch, Music
system, key barrel illumination, IC lamps flickering
or intermittent warning lamp on –off.
Grounding to be checked (check earth points from
respective connection till Battery -ve on body and
chassis ground).