Volkswagen Golf 1999 Service Manual page 649

Measured value (data) blocks
Evaluating display group 4, display zone 2 - control module voltage supply
Appears on
display
Less than
Alternator faulty, battery charge
specified
state low
Battery heavily loaded shortly after
starting due to high charging current
and accessories
Transfer resistance in current supply
or the Motronic Engine Control
Module (ECM) -J220- Ground (GND)
connection
Current draw when ignition is off
Greater than
Voltage control on alternator faulty
specified
Excess voltage due to slave starting
or quick charging unit
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Possible cause
Página 13 de 86
Corrective action
- Check alternator and
battery voltage, charge
battery:
Repair Manual, Electrical
Equipment; Repair Group 27
- Increase revs slightly for a
few minutes and switch off
accessories
- Check Motronic Engine
Control Module (ECM) -J220-
voltage supply Page 24-
163
- Eliminate current draw
- Check voltage control,
replace if necessary:
Repair Manual, Electrical
Equipment; Repair Group 27
- Check DTC memory
Page 01-23 , DTC memory,
checking and erasing
01-194
12/2/2005