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Home >> Volkswagen >> 2004 >> Passat Sedan (3B3) L4-1.8L Turbo (AWM) >> Repair and Diagnosis >> Powertrain Management >> Computers and Control Systems >> Testing and Inspection >> Initial Inspection and Diagnostic Overview >> Electronic Power Control (EPC) Warning Light >> EPC Warning Lamp Functional Check
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EPC Warning Lamp Functional Check




EPC, Function Check

Function test:
- Switch on ignition.

EPC warning lamp must light up.

If EPC indicator lamp does not light up when ignition is switched on:
- Check instrument cluster and EPC warning lamp as follows.

If EPC warning lamp does not light up when ignition is switched on, continue test as follows:
- Start engine and let run at idle:

EPC warning lamp must go out after one second.

If EPC warning lamp does not go out:
- Check DTC memory, repair any malfunctions and then erase DTC memory.