Audi Workshop Service and Repair Manuals > A2 > Running gear self-diagnosis for ESP, steering | Self diagnosis, V.A.G Inspection Service | Electronic Stability Program Continental Teves Mark 20 IE

Running gear self-diagnosis for ESP, steering

Electronic Stability Program Continental Teves Mark 20 IE

Description of warning lamp functions

Indication of faults by way of warning lamps in dash panel insert

Attention:
Once ABS warning lamp -K47 and brake system warning lamp -K118 have come on, even slight braking may cause rear wheels to lock.

ABS warning lamp -K47

◆ → Possible causes of trouble if ABS warning lamp -K47 -2- does not go out after switching on ignition and on completion of test sequence:

-a- Power supply less than 10 V
-b- ABS fault
ABS fault -b- results in deactivation of anti-locking brake system. EBPD (electronic brake pressure distribution) function remains active, thus ensuring full operability of conventional brake system.
Interrogating fault memory
=>Page 01-155
-c- Sporadic speed sensor fault after last vehicle start
In the event of a sporadic speed sensor fault -c- the ABS warning lamp goes out automatically on exceeding a speed of 20 km/h after re-starting vehicle.

Brake system warning lamp -K118

◆ → Possible causes of trouble if brake system warning lamp -K118 -1- does not go out after switching on ignition and on completion of test sequence:

-a- Brake fluid level too low
-b- Open circuit in ASR/ESP warning lamp actuation wire
-c- Dash panel insert defective
-d- Open circuit in connection between dash panel insert and ABS with EDL control unit -J104

=> Current Flow Diagrams, Electrical Fault-finding and Fitting Locations binder

Traction control system/ESP warning lamp -K86

◆ Possible causes of trouble if traction control system/ESP warning lamp -K86 -4- does not go out after switching on ignition and on completion of test sequence:

-a- ASR/ESP system deactivated using button -E256
-b- Short to positive in ASR button
-c- Short to positive in actuation of ASR/ESP warning lamp
-d- Open circuit in ASR/ESP warning lamp actuation wire
-e- ABS with EDL control unit -J104 unplugged or no power supply/term. 15 for control unit

ASR or ESP is in control mode if traction control system warning lamp -K86 flashes whilst driving.

ABS warning lamp -K47, traction control system/ESP warning lamp -K86 and brake system warning lamp -K118

◆ Lighting of ABS warning lamp, traction control system/ESP warning lamp -2- and brake system warning lamp -1- indicates:

Attention:
Failure of electronic brake pressure distribution (EBPD) may cause rear wheels to lock even in the event of slight braking.

Handbrake warning lamp -K14

◆ The handbrake warning lamp -K14 lights with ignition on if handbrake is actuated.


Brake system warning lamp -K118	ABS warning lamp -K47	Traction control system/ESP warning lamp -K86	ASR button for ASR off	Possible reasons for lighting of warning lamps
off	off	off		- All warning lamps go out after self-test (after approx. 2 s ignition on); all systems OK
on	off	off		- Brake fluid level too low
off	on	off		- Sporadic speed sensor fault
off	off	flashes		- ASR/ESP in control mode; ASR/ESP warning lamp flashes approx. 3 times per second
off	off	on	Button pressed	- ASR deactivated by way of button - ABS and ESP remain active
off	flashes	on		- 00000 used to encode ABS with EDL control unit -J104
off	on	flashes		- Implementation of EOL test; lamps go out again on successful completion of test
on	on	on		- ESP failure, e.g. fault in steering angle sender, lateral acceleration sender, yaw rate sender, brake pressure senders or speed sensors - ABS/ESP failure - EBPD failure; deactivation of all systems

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