Passat Sedan L4-1781cc 1.8L Turbo (AEB) (1999)
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Measure resistance.
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Specification: 0.0 to 19.9 Ohms
If specification obtained
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Set Multimeter to "Voltage measurement" range.
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Connect Multimeter using aux. cables from VW 1594 to measure Voltage at terminals 1 + 2 (connector to Engine Control Module).
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Start engine and let idle.
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Measure the Voltage supply:
When Display group 41, Display zone 4 shows
Display, Htg.aC.ON:
Specification: 11.0 to 14.5 Volts
