2005 SUZUKI JIMNY electrical

Downloaded from www.Manualslib.com manuals search engine 6F-4 IGNITION SYSTEM (ELECTRONIC IGNITION SYSTEM)
IGNITION SYSTEM DIAGNOSTIC FLOW TABLE
Step Action Yes No
1Was “Engine Diagnostic Flow Table” in Section 6 per-
formed?Go to Step 2. Go to “Engine Diag.
Flow Table” in Section
6.
2Ignition Spark Test
1) Check all spark plugs for condition and type refer-
ring to “Spark Plugs” section.
2) If OK, perform ignition spark test, referring to “Igni-
tion Spark Test” section.
Is spark emitted from all spark plugs?Go to Step 11. Go to Step 3.
3Diagnostic Trouble Code (DTC) Check
Is DTC stored in ECM?Go to applicable DTC
Diag. Flow Table in
Section 6.Go to Step 4.
4Electrical Connection Check
1) Check ignition coil assemblies and high-tension
cords for electrical connection.
Are they connected securely?Go to Step 5. Connect securely.
5High-tension Cords Check
1) Check high-tension cord for resistance referring to
“High-Tension Cords” section.
Is check result satisfactory?Go to Step 6. Replace high-tension
cord(s).
6Ignition Coil Assembly Power Supply and Ground Cir-
cuit Check
1) Check ignition coil assembly power supply and
ground circuits for open and short.
Are circuits in good condition?Go to Step 7. Repair or replace.
7Ignition Coil Assembly Check
1) Check ignition coil for resistance referring to “Igni-
tion Coil Assembly” section.
Is check result satisfactory?Go to Step 8. Replace ignition coil
assembly.
8Crankshaft Position (CKP) Sensor Check
1) Check crankshaft position sensor referring to Step
2 and 6 of “DTC P0335 (No.23) CKP Sensor Cir-
cuit Malfunction” in Section 6.
Is check result satisfactory?Go to Step 9. Tighten CKP sensor
bolt, replace CKP sen-
sor or CKP sensor
plate.
9Ignition Trigger Signal Circuit Check
1) Check ignition trigger signal wire for open, short
and poor connection.
Is circuit in good condition?Go to Step 10. Repair or replace.
10A Known-good Ignition Coil Assembly Substitution
1) Substitute a known-good ignition coil assembly
and then repeat Step 2.
Is check result of Step 2 satisfactory?Go to Step 11. Substitute a known-
good ECM and then
repeat Step 2.
11Ignition Timing Check
1) Check initial ignition timing and ignition timing
advance referring to “Ignition Timing” section.
Is check result satisfactory?System is in good con-
dition.Check CKP sensor,
CKP sensor plate and
input signals related to
this system.

Downloaded from www.Manualslib.com manuals search engine 6F-8 IGNITION SYSTEM (ELECTRONIC IGNITION SYSTEM)
6) Measure resistance between terminals as follows by using
analog type ohmmeter.
If check result is not satisfactory, replace ignition coil assem-
bly.
Secondary coil resistance
“a” – “b” : 7.5 – 14 k
Ω (at 20°C, 68°F)
7) Install ignition coil assembly.
8) Tighten ignition coil bolts, and then connect ignition coil cou-
pler.
9) Install high-tension cord to ignition coil assembly while grip-
ping its cap.
10) Install cylinder head upper cover.
Crankshaft Position Sensor (CKP Sensor)
Refer to “Crankshaft Position Sensor” in Section 6E for removal,
inspection and installation.
Ignition Timing
INSPECTION
1) When using SUZUKI scan tool (1), connect SUZUKI scan
tool to DLC (2) with ignition switch OFF.
Special tool
(A) : SUZUKI scan tool
2) Start engine and warm it up to normal operating tempera-
ture.
3) Make sure that all of electrical loads except ignition are
switched off.
4) Check to be sure that idle speed is within specification.
(Refer to “Idle Speed/Idle Air Control Duty Inspection” in
Section 6E.)
NOTE:
Ignition timing is not adjustable. If ignition timing is
out of specification, check system related parts.
Before starting engine, place transmission gear shift
lever in “Neutral” (shift selector lever to “P” range for
A/T model), and set parking brake.

Downloaded from www.Manualslib.com manuals search engine 6H-2 CHARGING SYSTEM
General Description
Battery
The battery has three major functions in the electrical system.
It is a source of electrical energy for cranking the engine.
It acts as a voltage stabilizer for the electrical system.
It can, for a limited time, provide energy when the electrical
load exceeds the output of the generator.
CARRIER AND HOLD-DOWN
The battery carrier should be in good condition so that it will sup-
port the battery securely and keep it level.
Before installing the battery, the battery carrier and hold-down
clamp should be clean and free from corrosion and make certain
there are no parts in carrier.
To prevent the battery from shaking in its carrier, the hold-down
bolts should be tight enough but not over-tightened.
ELECTROLYTE FREEZING
The freezing point of electrolyte depends on its specific gravity.
Since freezing may ruin a battery, it should be protected against
freezing by keeping it in a fully charged condition. If a battery is
frozen accidentally, it should not be charged until it is warmed.
SULFATION
If the battery is allowed to stand for a long period in discharged
condition, the lead sulfate becomes converted into a hard, crystal-
line substance, which will not easily turn back to the active mate-
rial again during the subsequent recharging. “Sulfation” means
the result as well as the process of that reaction.
Such a battery can be revived by very slow charging and may be
restored to usable condition but its capacity is lower than before.

Downloaded from www.Manualslib.com manuals search engine CHARGING SYSTEM 6H-3
BUILT-IN INDICATOR (IF EQUIPPED)
The battery has a built-in temperature compensated indicator in
the top of the battery. This indicator is to be used with the follow-
ing diagnostic procedure. When checking the indicator, make
sure that the battery has a clean top. A light may be needed in
some poorly-lit areas.
Three types of indication which is available under normal opera-
tion are as follows.
Green Dot
Battery is sufficiently charged for testing.
Dark
Battery must be charged before testing.
If there is a cranking complaint, battery should be tested as
described in Diagnosis section. Charging and electrical sys-
tems should also be checked at this time.
Clear or Light Yellow
This means that fluid level is below the bottom of hydrome-
ter. Its possible cause is excessive or prolonged charging, a
broken case, excessive tipping or normal battery deteriora-
tion.
When the battery is found in such condition, it is possible
that high charging voltage is caused by the faulty charging
system and therefore, charging and electrical systems need
to be checked. If there is a trouble in cranking and its cause
lies in the battery, it should be replaced.
CARE OF BATTERY
1) The battery is a very reliable component, but needs periodi-
cal attentions.
Keep the battery carrier clean.
Prevent rust formation on the terminal posts.
Keep the electrolyte up to the upper level uniformly in all
cells. WARNING:
Never expose battery to open flame or electric spark
because of battery generate gas which is flammable
and explosive.
Do not allow battery fluid to contact eyes, skin, fabrics,
or painted surfaces as fluid is a corrosive acid. Flush
any contacted area with water immediately and thor-
oughly.
Batteries should always be kept out of reach of chil-
dren.

Downloaded from www.Manualslib.com manuals search engine 6H-4 CHARGING SYSTEM
When keeping battery on vehicle over a long period of time, follow
instructions given below.
Weekly, start the engine and run it until it reaches normal
operating temperature with engine speed of 2,000 to 3,000
rpm. Make sure all electric switches are off before storing the
vehicle.
Recharge the battery twice a month to prevent it from dis-
charging excessively. This is especially important when
ambient temperature is low.
The battery discharges even when it is not used, while vehi-
cles are being stored. Battery electrolyte can freeze and bat-
tery case can crack at cold ambient condition if battery is not
properly charged.
2) Keep the battery cable connections clean.
The cable connections, particularly at the positive (+) termi-
nal post, tend to become corroded. The product of corrosion,
or rust, on the mating faces of conductors resists the flow of
current.
Clean the terminals and fittings periodically to ensure good
metal-to-metal contact, and grease the connections after
each cleaning to protect them against rusting.
3) Be always in the know as to the state of charge of the bat-
tery. The simplest way to tell the state of charge is to carry
out a hydrometer test. The hydrometer is an instrument for
measuring the specific gravity (S.G.) of the battery electro-
lyte. The S.G. of the electrolyte is indicative of the state of
charge. Refer to “HYDROMETER TEST” in this section.
Generator
The generator is a small and high performance type with an IC regulator incorporated.
The internal components are connected electrically as shown below figure.
The generator features are as follows:
Solid state regulator is mounted inside the generator.
All regulator components are enclosed into a solid mold.
This unit along with the brush holder assembly is attached to the rear housing.
The IC regulator uses integrated circuits and controls the voltage produced by the generator, and the volt-
age setting cannot be adjusted.
The generator rotor bearings contain enough grease to eliminate the need for periodic lubrication. Two
brushes carry current through the two slip rings to the field coil mounted on the rotor, and under normal con-
ditions will provide long period of attention-free service.
The stator windings are assembled on the inside of a laminated core that forms part of the generator frame.
A condenser mounted in the rear housing suppresses radio noise.

Downloaded from www.Manualslib.com manuals search engine 6H-6 CHARGING SYSTEM
Diagnosis
Battery
COMMON CAUSES OF FAILURE
A battery is not designed to last indefinitely; however, with proper
care, it will provide many years of service. If the battery performs
satisfactorily during test but fails to operate properly for no appar-
ent reason, the followings are some factors that may point to the
cause of trouble:
Accessories left on overnight or for an extended period with-
out the generator operating.
Slow average driving speeds for short periods.
Electrical load exceeding generator output particularly with
addition of after market equipment.
Defects in charging system such as high resistance, slipping
drive belt, loose generator output terminal, faulty generator
or voltage regulator. Refer to “Generator” in this “Diagnosis”
section.
Battery abuse, including failure to keep battery cable termi-
nals clean and tight or loose battery hold down.
Mechanical problems in electrical system such as shorted or
pinched wires.
VISUAL INSPECTION
Check for obvious damage, such as cracked or broken case or
cover, that could permit loss of electrolyte. If obvious damage is
noted, replace battery. Determine cause of damage and correct
as needed.
HYDROMETER TEST
The direct method of checking the battery for state of charge is to
carry out a high rate discharge test, which involves a special pre-
cise voltmeter and an expensive instrument used in the service
shops, but not recommendable to the user of the vehicle.
At 20 °C of battery temperature (electrolyte temperature):
The battery is in FULLY CHARGED STATE if the electrolyte
S.G. is 1.280.
The battery is in HALF CHARGED STATE if the S.G. is
1.220.
The battery is in NEARLY DISCHARGED STATE if the S.G.
is 1.150 and is in danger of freezing.
As the S.G. varies with the temperature, if battery temperature is
not at 20 °C (68 °F), you have to correct your S.G. reading (taken
with your hydrometer) to the value at 20 °C (68 °F) and apply the
corrected S.G. value to the three-point guide stated value. For the
manner of correction, refer to the graph showing the relation
between S.G. value and temperature.

Downloaded from www.Manualslib.com manuals search engine 6H-10 CHARGING SYSTEM
1) Set parking brake and place automatic transmission in
PARK (NEUTRAL on manual transmission). Turn off ignition,
turn off lights and all other electrical loads.
2) Check electrolyte level. If it is below low level line, add dis-
tilled water.
3) Attach end of one jumper cable to positive terminal of
booster battery and the other end of the same cable to posi-
tive terminal of discharged battery. (Use 12-volt battery only
to jump start engine).
4) Attach one end of the remaining negative cable to negative
terminal of booster battery, and the other end to a solid
engine ground (such as exhaust manifold) at least 45 cm (18
in.) away from battery of vehicle being started.
5) Start engine of vehicle with booster battery and turn off elec-
trical accessories. Then start engine of the vehicle with dis-
charged battery.
6) Disconnect jumper cables in the exact reverse order.
WITH CHARGING EQUIPMENT
WARNING:
Departure from these conditions or procedure
described below could result in:
–Serious personal injury (particularly to eyes) or
property damage from such causes as battery explo-
sion, battery acid, or electrical burns.
–Damage to electronic components of either vehicle.
Remove rings, watches, and other jewelry. Wear
approved eye protection.
Be careful so that metal tools or jumper cables do not
contact positive battery terminal (or metal in contact
with it) and any other metal on vehicle, because a short
circuit could occur.
WARNING:
Do not connect negative cable directly to negative termi-
nal of dead battery.
CAUTION:
When jump starting engine with charging equipment, be
sure equipment used is 12-volt and negative ground. Do
not use 24-volt charging equipment. Using such equip-
ment can cause serious damage to electrical system or
electronic parts.