Volkswagen Workshop Service and Repair Manuals

"EPC" is the abbreviation for Electronic Power Control.

→ Fitting location of EPC warning lamp

When the ignition is switched on the engine control unit checks all components which are important for the correct functioning of the electronic power control.

If no faults are detected in the electronic accelerator (EPC system), the engine control unit switches the EPC warning lamp off after the engine has started.

If faults are detected in electronic accelerator system when the engine is running, the engine control unit will switch on the EPC lamp (these faults are marked in the fault table). Simultaneously an entry is made in the engine control unit fault memory.

Functional check:

• ‒ Switch on ignition:
       the EPC warning lamp must light-up.

If the EPC warning lamp does not light-up with ignition switched on:

• ‒ Check combi-instrument and EPC warning lamp as follows:

=> Electrical system self-diagnosis; Repair group 01

If the EPC warning lamp lights-up with ignition switched on, continue check as follows:

• ‒ Start engine and run at idling speed:
       The EPC warning lamp must go out after
       one second.

If the EPC warning lamp does not go out:

• ‒ Interrogate fault memory, if necessary, repair any faults and then erase fault memory , interrogating and erasing fault memory.