Opel Frontera UBS. Manual - part 423
CHARGING SYSTEM 6D3 – 9
IC REGULATOR
Measureing instruments is necessary.
Take the following measurements with the
instruments connected as shown in the illustration.
•
V1 Voltage at BAT1
•
V2 Voltage across F–E
•
Take measurement with ‘S’ terminal disconnected.
•
V3 Measure the voltage at BAT1 – BAT2.
•
Measurement the voltage across the E–F while
varying resistance gradually from zero using variable
resistor.
Then check that voltage increases from 2V to 10 – 13.
If increase in voltage is interrupted at any point,
replace the regulator.
•
V4 Measure the voltage across the intermediate tap
on variable resistor and ‘E’ terminal without actuating
the variable resistor.
If measured value deviates from the standard, replace the
regualator.
Check the following with the instrument connected as
illustrated.
Measure the voltage across the teminals B and E by
gradually increasing voltage with variable resistor RV.
Check to see if voltage increases from lower than 2V to
range from 10 to 13 volts.
If the voltage does not vary, the regulator is defective and
should be replaced.
Check the voltage across the intermediate tap of the
variable resistor and terminal E without actuating the
variable resistor.
If measured voltage deviates from the standard value,
replace the regulator.
Standard
10 – 13
V
Standard
Limit
2 or less
2 or more
V
Standard
20 – 26
V
Standard voltage at 20°C (68°F)
14.0 – 14.6
V
Standard voltage at 20°C (68°F)
14.5 – 16.6
V