Volkswagen Golf 1999 Service Manual page 422

On Board Diagnostic (OBD)
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Functional check:
- Switch on ignition:
Malfunction Indicator Light (MIL) must light-up.
If the Malfunction Indicator Light (MIL) does not
light-up with ignition switched on:
- Check instrument cluster and Electronic Power
Control (EPC) Warning Light -K132-:
Repair Manual, Electrical Equipment On
Board Diagnostic (OBD),Repair Group 01
If the Malfunction Indicator Light (MIL) lights-up
with ignition switched on:
- Start engine and run at idle:
Malfunction Indicator Light (MIL) must go out
after several seconds.
If the Malfunction Indicator Light (MIL) does not
go out:
- Check DTC memory, repair Diagnostic Trouble
Codes (DTCs) if necessary and then erase DTC
memory Page 01-23
and erasing.
- Read off readiness code
DTC memory has been erased or the Motronic
Engine Control Module (ECM) -J220- was
disconnected from battery (B+) positive, the
readiness code must be generated again
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, DTC memory, checking
Page 01-146 . If the
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