Suzuki XL7 2007 Service Manual page 923

Step
1. Turn OFF all accessories.
2. Turn OFF the ignition.
WARNING
!
Make sure that the load is completely turned
off before connecting or disconnecting a
carbon pile load tester to the battery.
Otherwise, sparking could ignite battery
gasses which are extremely flammable and
may explode violently.
3. Connect a carbon pile tester to the vehicle.
NOTE
5
When measuring generator output current,
be sure the inductive probe encircles the
generator output wire.
4. Connect an inductive ammeter probe to the output
circuit of the generator.
5. Start the engine.
6. With a scan tool, command the GEN-L Terminal
ON.
7. Increase engine speed to 2,500 RPM.
8. Adjust the carbon pile as necessary in order to
obtain the maximum current output.
Is the generator output greater than or equal to the load
test value as specified in "Generator Usage"?
6 Is the voltage measured greater than 15.5 volts?
1. Leave the vehicle accessories ON or maintain load
test value.
2. Maintain engine speed at 2,500 RPM.
3. Measure the voltage of the battery.
7
4. Measure the voltage between the generator output
terminal and the generator metal housing.
Is the voltage measured of the generator within 0.2 volts
of the battery voltage?
1. Turn the engine OFF. disconnect the generator
harness connector
2. Start the engine.
3. Measure the voltage between the generator turn on
8
signal circuit and ground.
4. With a scan tool, command the GEN-L Terminal ON
and OFF.
Does the voltage measure greater than the first value
ON and near the second value OFF?
1. Maintain the engine speed at 2,500 RPM and
continue to operate the generator at the load test
value.
9
2. Measure the voltage drop from the battery negative
terminal to the metal housing of the generator. Refer
to "Circuit Testing: " and "Wiring Repairs: ".
Is the voltage measured less than the specified value?
Action
Charging System:
Value(s) Yes
— Generator OK
— Go to Step 12
— Go to Step 14
4.7 V
Go to Step 14
0 V
0.5 V Go to Step 10
1J-30
No
Go to Step 7
Go to Step 7
Go to Step 9
Go to Step 11
Go to Step 15