3
Knorr-Bremse Group
PD-203-530
ES1220
Doc. No. Y250907 (EN - Rev. 001)
September 2016
The information contained herein is subject to alteration without notice and therefore may not be the latest release. Please check our website www.knorr-bremseCVS.com for the latest update or contact your local Knorr-Bremse representative.
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Note: If service work is carried out on a vehicle based on information provided herein, it is the responsibility of the workshop to ensure the vehicle is fully tested and in full
functional order before the vehicle is returned into service. Knorr-Bremse accepts no liability for problems caused as a result of appropriate tests not being carried out.
Copyright © Knorr-Bremse AG - all rights reserved, including industrial property rights applications. Knorr-Bremse AG retains any power of disposal, such as for copying and transferring.
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KB4TA D ABS ECU
C o m m e r c i a l V e h i c l e S y s t e m s
Electrical connections
The Knorr-Bremse KB4TA D ECU connectors use a 12-pin Deutsch DT series connector (Code A) for ISO 7638
power supply, diagnostics and auxiliary I/Os such as ISO 1185 stop lamp power supply, additional third modulator
and one additional Input/Output. Also a Code B connector for the connections to the ABS Relay Modulators.
The ECU also utilizes either two or four wheel speed sensor inputs:
• SL & SR are used for 2S/2M applications.
• SAL and SAR are additional connections for 4S/2M and 4S/3M applications, note: these sensors may be installed
on lift axles in certain system applications.
For ECUs K068353 and K146282:
Pin
Signal
Connection
X1-1
AUXI01
Auxiliary Input/Output
(4S/3M: Valve 3rd Modulator)
X1-2
AUXRET3
Return Line for AUXI03
(Diagnostics Ground)
X1-3
TI_CANL
5V-CAN Low for Diagnostics
X1-4
GND_M
System Ground
(ISO 7638 - ABS connector - Pin 4)
X1-5
TI_CANH
5V-CAN High for Diagnostics
X1-6
BAT
Valve Supply Voltage
(ISO 7638 - ABS connector - Pin 1)
Pin
Signal
Connection
X1-7
GND_H
Warning Lamp Ground
(ISO 7638 - ABS connector - Pin 3)
X1-8
WL
Warning Lamp
(ISO 7638 - ABS connector - Pin 5)
X1-9
IGN
ECU Supply Voltage
(ISO 7638 - ABS connector - Pin 2)
X1-10
AUXI03 (DIA)
Auxiliary Input/Output
(Diagnostics Supply Voltage)
X1-11
GND
Stop Lamp Ground
X1-12
BL
Stop Lamp Supply
SL − Left Sensor
SAL − Additional Left Sensor for
4S/2M and 4S/3M configurations
SR − Right Sensor
SAR − Additional Right Sensor for
4S/2M and 4S/3M configurations
X1 Connector
Pin
Signal
Connection
X2-3
MV1 (SL side)
24V Modulator 1 (pin 6.3)
X2-4
MV2 (SR side)
24V Modulator 2 (pin 6.3)
Pin
Signal
Connection
X2-9
LSS1
GND Modulator 1 and 2 (pin 6.2) *
X2-10
LSS1
AUXIORET1
(4S/3M: Valve 3rd Modulator Ground)
*
X2 Connector
X2
4
X1 - Code A
(grey connector)
X2 - Code B
(black connector)
* Connections on X2-9 and X2-10 are interchangeable.
Y026787: 006: EN: Released: Fri Nov 11 11:18:50 CET 2016:
