Volkswagen Golf 1999 Service Manual page 786

Components, checking
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Checking voltage supply
- Connect multimeter to measure
voltage at terminals 3 and 4
(connector to Motronic Engine
Control Module (ECM) -J220-)
using adapter cables from VAG
1594.
- Start engine and run at idle
speed.
- Measure voltage supply and
observe display group 41, display
zone 2.
Display Htg.bC.ON: Specification:
11.0 to 14.5 V
Display Htg.bC.ON / Htg.bC.OFF
(alternating): Specification:
Between 0.0 to 12.0 V fluctuating
- Switch off ignition.
If no voltage is present:
- Remove wiper arms and cowl
panel:
Repair Manual, Electrical
Equipment; Repair Group 92
- Connect VAG 1598/31 test box to
control module wiring harness.
Engine Control Module (ECM) -
J220- remains disconnected.
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