Suzuki 2000 Grand Vitara SQ625 Service Manual page 703

6H-10 CHARGING SYSTEM
[60 A type]
Volt
[70 A and 85 A types]
HEATSINK TEMPERATURE (_C)
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
Load Check [70 A and 85 A types only]
1) Run engine at 2,000 rpm and turn on head light and heater mo-
2) Measure current and if it is less than 20 A (70A type) or 30 A (85
OVERCHARGED BATTERY
1) To determine battery condition, refer to BATTERY section.
2) If obvious overcharge condition exists as evidenced by exces-
3) If measured voltage is higher than upper limit value, proceed to
4) Check ground of brushes. If brushes are not grounded, replace
Temperature
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.
tor.
A type) repair or replace generator.
sive spewing of electrolyte, measure generator B terminal volt-
age at engine 2000 rpm.
disassembly section of generator service.
IC regulator. Then check field coil for grounds and shorts, refer-
ring to "INSPECTION" section.