Golf GL L4-2.0L (AEG) (2001)
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Set multimeter to "Voltage measurement" range.
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Connect multimeter using aux. cables from VW1594 to measure voltage at terminals -1- and -2- (harness connector to Engine Control Module
(ECM).
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Start engine and run at idle.
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Measure voltage supply and observe display group 41, display field 2.
Display: Htg.bC.ON
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Specified value: 11.0-14.5 V
Display: Htg.bC.ON/Htg.bC.OFF (alternating)
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Specified value: Between 0.0-12.0 V fluctuating
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Turn off ignition.
If no voltage is present:
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Remove wiper arms and plenum chamber cover.
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Connect VAG1598/22 test box to control module wiring harness.
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Check wiring between test box and 4-pin harness connector for open circuit according to wiring diagram.
Terminal -2- + socket 27
Wire resistance: max. 1.5 ohms
If the specified value is obtained:
