Generator Symptom Diagnosis; Generator Test (Undercharged Battery Check) - Suzuki Grand Vitara 2011 Manual

1J-4 Charging System: For Petrol Engine Model

Generator Symptom Diagnosis

A charging circuit wiring diagram for generator connection is shown in "Generator Description: For Petrol Engine
Model". 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 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: For Petrol Engine Model".
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
Noisy generator
Charge indicator light
does not light with
ignition ON and engine off
Charge indicator light
does not go out with
engine running
Battery requires frequent
recharging

Generator Test (Undercharged Battery Check)

This condition, as evidenced by slow cranking or
indicator clear with dark or light yellow dot can be
caused by one or more of the following conditions even
though indicator lamp may be operating normal.
The following procedure also applies to cars with
voltmeter and ammeter.
1) Make sure that undercharged condition has not been
caused by accessories left on for extended period of
time.
2) Check drive belt for proper tension.
3) If battery defect is suspected, refer to "Battery
Description: For Petrol Engine Model".
4) Inspect wiring for defects. Check all connections for
tightness and cleanliness, battery cable connections
at battery, starting motor, ignition ground cable and
no "C" terminal circuit at ground.
5) Connect switch (6), load (5), battery (4), voltmeter
(3) and ammeter (2) to generator (1) as shown in
figure.
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 faulty
Poor contact between brush and slip
ring
Drive belt loose or worn
IC regulator or generator faulty
Wiring faulty
S6JB0A1A14003
Correction / Reference Item
Adjust or replace drive belt.
Check generator.
Check mounting condition.
Check generator.
Check generator.
Check fuse.
Check BCM, combination meter and/or CAN
communication line.
Tighten loose connection.
Check generator.
Repair or replace.
Adjust or replace drive belt.
Check charging system.
Repair wiring.
Voltmeter: Set between generator "B" terminal
and ground.
Ammeter: Set between generator "B" terminal
and battery (+) terminal.
NOTE
Use fully charged battery.
6) Measure current and voltage.
S6JB0A1A14002
IYSQ011A0007-01