Initial Inspection and Diagnostic Overview

Malfunction indication via indicator lamps for level control system





Warning lamps





Brake Pad Wear Indicator Lamp K32
^ If Brake Pad Wear Indicator Lamp K32 - 2 - does not switch off 3 seconds after the ignition is switched on or if it lights up when vehicle is driven, it could be caused by the following malfunctions:

- a - Brake pads may be worn.

Check front and rear axle brake pads/linings. Replace worn brake pads/linings.

- b - There is a wiring malfunction. Electrical Wiring Diagrams, Troubleshooting and Component Locations

ABS Warning Lamp K47
^ If ABS Warning Lamp K47 - 3 - does not go out after the ignition is switched on and the test sequence is complete, it could be caused by the following errors:

- a - Voltage supply is under 10 volts.

- b - There is an ABS malfunction.

CAUTION: The ABS system remains switched off during an ABS malfunction - b -, but the traditional brake system remains fully functional.

- c - There was a periodic wheel speed sensor malfunction since the last vehicle start.

In this case the ABS Warning Lamp K47 will go out after the engine is restarted and vehicle speed exceeds 20 km/h.

- d - The connection from instrument cluster to ABS Control Module J104 is interrupted.

- e - The instrument cluster is faulty.

ABS Warning Lamp K47 and Brake System Warning Lamp K118
^ If ABS Warning Lamp K47 - 3 - goes out but Brake System Warning Lamp K118 - 4 - lights up, the malfunctions causes may be:

- a - Parking brake is engaged.

- b - Brake fluid level is too low (warning lamp blinks).

Three warning tones are audible after switching on the ignition.

- c - There is a malfunction in the wiring to Brake System Warning Lamp K118.

If ABS Warning Lamp K47 - 3 - and Brake System Warning Lamp K118 - 4 - lights up, ABS system is malfunctioning. A change in braking behavior should be checked.

CAUTION: After ABS Warning Lamp K47 and Brake System Warning Lamp K118 light up, rear wheels may lock prematurely when braking.

ASR/ESP Control Lamp K155
^ If ASR/ESP Control Lamp K155 - 1 - does not turn off after the ignition is switched on and the test sequence is completed, the malfunction may be:

There is a malfunction present which only affects the ASR/ESP. The ABS/EDL and EBD safety systems are still completely functional.

- a - Short circuit to B+ in ASR/ESP Button E256.

- b - A malfunction in the actuation of ASR/ESP Control Lamp K155.

- c - ASR/ESP system was switched off by ASR/ESP Button E256

If ASR/ESP Control Lamp K155 flashes while driving, the ASR or ESP systems are regulating the system.

^ If the ASR/ESP Control Lamp K155 - 1 - did not light up during self-test, the following malfunction is present:

- a - The ASR/ESP Control Lamp K155 is defective.