Initial Inspection and Diagnostic Overview

General Information

Various standard or optional radio systems are installed from 1998 model year.

Before troubleshooting or servicing, technicians must be familiar with the functions and operation specifics of the applicable standard or optional radio system.

Radio system "Premium III" installed from start of production, does NOT have OBD capability.

Radio systems "Premium IV" installed as a running change from 10.97 Up To 08.99 production, as well as standard radio system "Premium V" and optional "Monsoon" system installed from From 08.99 have microprocessor controlled OBD capabilities.

If malfunctions occur in monitored components, Diagnostic Trouble Codes (DTC) will be stored in memory together with an indication of malfunction type. A maximum of 4 DTCs can be stored simultaneously.

Sporadic malfunctions (indicated in the readout by "SP") are automatically cancelled if not repeated in the next 50 engine starts.

Before performing any troubleshooting or inspection, always begin by checking for DTCs using the On Board Diagnostic (OBD) program. DTCs stored in memory are retrieved/checked with VAG 1551/1552 Scan Tool (ST) or VAS 5051 Vehicle Diagnostic Tester.