Knorr-Bremse KB3-TA ECU Blink Code List

SITE CONTENT

ABS Troubleshooting for Trucks, Trailers, and Buses

STEP 4: Blink Codes for Knorr-Bremse KB3-TA System ECU

Use the table to identify ABS faults from the ECU Blink Codes recorded in STEP 3: Blink code identification and system response
Links to solutions for common ABS faults can also be found below
Please ensure all necessary Health and Safety precautions are implemented before commencing any repair work
A list of useful ABS Diagnostic Tools is available on this website
If you require further help or information, please contact us

Knorr-Bremse KB3-TA System ECU

Number of Flashes (Configuration and Level 1 Fault Code)	- - - - - Configuration GREEN	Faulty Component (Level 1 Fault Code) RED	Fault Type AMBER
	- - - - - Configuration GREEN	Faulty Component (Level 1 Fault Code) RED	Level 2 Flashes
1	not used	not used	1	Not used
2	2S/2M	SL1 (sensor left 1)	2	Interruption
3	4S/2M	SL1 (sensor left 2)	3	Short circuit
4		SR1 (sensor right 1)	4	Short circuit to Ubat
5	4S/3M	SR1 (sensor right 2)	5	Dynamic sensor fault
6		SAL (sensor axle left)
7		SAR (sensor axle right)
8		ML (modulator left)
9		MR (modulator right)
10		MA (modulator axle)
11		Power supply	2	Under voltage
			3	Over voltage
			4	Interruption of aux. ground
12		Retarder
13
14
15		Internal ECU fault	2	Incorrect configuration - can be reset by automatic configuration
			3	EEPROM-Config. faulty. Change ECU
			4	Implausible valve operation. Switch off/on
			5	Fault at safety check. Switch off/on
			6	Power relay cannot be switched. Change ECU
			7	Power relay short circuit or unconfigured valve short circuit to Ubat. Change ECU
			15	Internal ECU error. Change ECU

This website is owned and operated by: Drakefield Limited, Unit 60, Horndon Industrial Estate, Station Road, West Horndon, Essex, United Kingdom CM13 3XL Tel: +44 (0)1277 814060

Design: www.vibe-interactive.com