Suzuki 2000 Grand Vitara SQ416, Service Manual

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YH4
GRAND
VITARA
[60 A type]
[70 A and 85 A types]
HEATSINK TEMPERATURE (
_
C)
REGULA
TED VOL
T
AGE (V)
Volt
Temperature
6H-10 CHARGING SYSTEM
Higher Voltage
If voltage is higher than standard value, check ground of brushes.
If brushes are not grounded, replace IC regulator.
Lower Voltage
[60 A type]
If voltage is below or in standard value, increase engine speed up
to 2000 – 2500 rpm soon after starting engine, and read maximum
value on ammeter immediately.
If current is less than 42 A, repair or replace generator.
[70 A and 85 A types]
If voltage is lower than standard value, proceed to following check.
2) Ground F terminal and start engine, then measure voltage at B
terminal as shown in left figure.
_
Voltage is higher than standard value
It is considered that generator itself is good but IC regulator
has been damaged, replace IC regulator.
_
Voltage is lower than standard value
Generator itself has problem, check the generator.
Load Check [70 A and 85 A types only]
1) Run engine at 2,000 rpm and turn on head light and heater mo-
tor.
2) Measure current and if it is less than 20 A (70A type) or 30 A (85
A type) repair or replace generator.
OVERCHARGED BATTERY
1) To determine battery condition, refer to BATTERY section.
2) If obvious overcharge condition exists as evidenced by exces-
sive spewing of electrolyte, measure generator B terminal volt-
age at engine 2000 rpm.
3) If measured voltage is higher than upper limit value, proceed to
disassembly section of generator service.
4) Check ground of brushes. If brushes are not grounded, replace
IC regulator. Then check field coil for grounds and shorts, refer-
ring to “INSPECTION” section.