Diagnostic Information And Procedures; Battery Inspection; Generator Symptom Diagnosis - Suzuki Swift Sport 2004 Service & Repair Manual

1J-4 Charging System:

Battery Inspection

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 apparent reason, the following are some
factors that may point to the cause of trouble:
• Accessories left on overnight or for an extended period without the generator operating.
• Slow average driving speeds for short periods.
• Electrical load exceeding generator output particularly with addition of aftermarket equipment.
• Defects in charging system such as high resistance, slipping drive belt, loose generator output terminal, faulty
generator or voltage regulator, Refer to "Generator Symptom Diagnosis".
• Battery abuse, including failure to keep battery cable terminals 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.

Generator Symptom Diagnosis

CAUTION
!
• Do not mistake polarities of "IG" terminal and "L" terminal.
• Do not create short circuit between "IG" and "L" terminals. Always connect these terminals through
a lamp.
• Do not connect any load between "L" and "E" terminals.
• When connecting charger or booster battery to vehicle battery, refer to "Jump Starting in Case of
Emergency".
Trouble in charging system will show up as one or more of the following conditions:
1) Faulty indicator lamp operation.
2) An undercharged battery as evidenced by slow cranking or indicator dark.
3) An overcharged battery as evidenced by excessive spewing of electrolyte from vents.
Condition
Noisy generator
Charge light does not
light with ignition ON and
engine off
Charge light does not go
out with engine running
(battery requires frequent
recharging)

Diagnostic Information and Procedures

Possible cause
Loose drive belt
Loose drive belt pulley
Loose mounting bolts
Worn or dirty bearings
Defective diode or stator
Fuse blown
Indicator lamp (LED) faulty
Wiring connection loose
IC regulator or field coil faulty
Poor contact between brush and slip
ring
Drive belt loose or worn
IC regulator or generator faulty
Wiring faulty
Correction / Reference Item
Adjust or replace drive belt.
Tighten by specified torque.
Tighten by specified torque.
Replace.
Replace.
Replace fuse and check for shorted circuit.
Replace combination meter.
Tighten loose connection.
Replace.
Repair or replace.
Adjust or replace drive belt.
Replace.
Repair wiring.
S7RS0B1A04001
S7RS0B1A04002