Haldex L31296A Manual

Kit Overview
The Haldex Intelligent Trailer Control Module (ITCM) ECU provides 2S/1M, 4S/2M, or 4S/3M ABS
applications. It may be used as a replacement for Select 1M, Select 2M and Select 2M Plus ECUs.
Installation
Mount the ITCM ECU on the ABS Air Valve in place of the existing Select ECU. For 1M Select
replacement, the mounting bracket must be changed accordingly.
Changing the ECU on 1M and 2M applications does not require a replumbing of the ABS Air Valves.
However, the S3A and S3B Speed Sensors are renamed to S1A and S1B, respectively. Also the Speed
Sensor locations in the wheel ends and on the ITCM ECU have been changed. Refer to the
Configuration Section for Speed Sensor location on the wheel ends and the following figure for
locating the Sensor to the ECU Connectors.
- Continued on Reverse Side -
Electrical Connections
Instruction
Guide
L31296A Rev. 3/20
Service Replacement Intelligent
Trailer Control Module (ITCM)
ABS ECU
ITCM ECU
(Electronic Control Unit)
Modulator Valve
Solenoid Cable
(23 Channel, 3M)
Modulator Valve
Solenoid Cable
(22 Channel, 2M/3M)
Modulator Valve
Solenoid Cable
(21 Channel, 1M/2M/3M)
ABS Power Cable
CAN Network Cable
S1B
S2B
S1A
S2A

Instruction
Guide
L31296A Rev. 3/20
Service Replacement Intelligent
Trailer Control Module (ITCM)
ABS ECU
Configuration
The Haldex ITCM ECU will auto-configure based on the number of speed sensors and valves plugged
into the ECU. Note that the Air Valves are renamed to 21, 22 and 23. Refer to the Electrical Connection
diagram for Modulator connection information.
2S/1M 4S/2M Side-by-Side
4S/2M Axle-by-Axle
S1BS1A
Tri-Axle
Curb
----- 2S/1M -----
(Air or Spring Suspension)
Road
S1BS1A21
Tandem Axle
Curb
(Air Suspension)
Road
----- 2S/1M -----
S1B
S1A
21
Tandem Axle
Curb
(Spring Suspension)
Road
----- 2S/1M -----
21
Road Curb
----- 2S/1M -----
S1B
S1A 21
Single Axle
(Air or Spring Suspension) CurbRoad
----- 4S/2M -----
Tri-Axle
(Air or Spring Suspension) (Air Suspension)
21 22
S1BS1A
S2BS2A
Quad-Axle
CurbRoad
----- 4S/2M -----
S1BS1A
S2B
S2A
21 22
(Spring Suspension)
Quad-Axle
CurbRoad
----- 4S/2M -----
S1BS1A
S2B
S2A
21 22
CurbRoad
----- 4S/2M -----
Tandem Axle
(Air or Spring Suspension)
S1BS1A
21 22
S2BS2A
CurbRoad
Tri-Axle
(Air or Spring Suspension)
----- 4S/2M -----
Tandem Axle
Curb
(Air or Spring Suspension)
Road
----- 4S/2M -----
22
21
S2B
S1B
S2A
S1A
2121
22
S2A
S1A
S2B
S1B
Quad-Axle
Curb
(Spring Suspension)
Road
----- 4S/2M -----
S2B
S1B
22
S2A
S1A
21
Full Trailer
Curb
(Air or Spring Suspension)
Road
----- 4S/2M -----
22
21
S2B
S1B
S2A
S1A
Quad-Axle
Curb
(Air Suspension)
Road
----- 4S/2M -----
S2B
S1B
22
S2A
S1A
21
L31296A US Rev. 3/20 Art Only
Additional Information Installation and Troubleshooting Guides available on the Haldex website.
Intelligent Trailer Control Module (ITCM) Installation/Service Manual (L31286W)
DIAG+ Diagnostic Software Users Guide (L31287W)
Technical Support Department Please call [phone] and Press #2 to reach a
Haldex Technical Specialist.