Suzuki 2006 SX4, Service Manual

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Charging System: 1J-4
Diagnostic Information and Procedures
Battery Inspection
S6RW0C1A04001
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
S6RW0C1A04002
A charging circuit wiring diagram for generator connection is shown in “Generator Description”. To avoid damage,
always follow these precautions:
CAUTION
!
• Do not mistake polarities of “IG” terminal and “L” terminal.
• Do not create a short circuit between “IG” and “L” terminals. Always connect these terminals
through a light.
• 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 charge indicator light operation.
2) An undercharged battery as evidenced by slow cranking or indicator clear with dark on light yellow dot.
3) An overcharged battery as evidenced by excessive spewing of electrolyte from vents.
Condition Possible cause Correction / Reference Item
Noisy generator Loose drive belt Adjust or replace drive belt.
Loose drive belt pulley Check generator.
Loose mounting bolts Check mounting condition.
Worn or dirty bearings Check generator.
Defective diode or stator Check generator.
Charge indicator light
does not light with
ignition ON and engine off Fuse blown Check fuse.
Indicator light (LED) faulty Check BCM, combination meter and/or CAN
communication line.
Wiring connection loose Tighten loose connection.
IC regulator faulty Check generator.
Poor contact between brush and slip
ring Repair or replace.
Charge indicator light
does not go out with
engine running
Battery requires frequent
recharging Drive belt loose or worn Adjust or replace drive belt.
IC regulator or generator faulty Check charging system.
Wiring faulty Repair wiring.