WABCO TP0223 Operating and installation instructions

WABCO AIR MANIFOLD
DISTRIBUTION
MODULE ASSEMBLY
SERVICE INFORMATION
TP0223

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Table of Contents
Edition 1
10.2019
TP0223 1 (en)
This publication is not subject to any update service. Information contained in this publication
was in effect at the time the publication was approved for printing and is subject to change
without notice or liability. WABCO reserves the right to revise the information presented or to
discontinue the production of parts described at any time.
Table of Contents
1 General Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2 Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4 Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
5 Mounting Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
6 Air Lines. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
7 Air Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
8 Troubleshooting and Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
8.1 Voltage Check. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
8.2 Resistance Test. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
8.3 Air Leakage Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
8.4 Valve Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
9 Replacement Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
9.1 Solenoid Valve . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
9.2 Mounting Base/Assembly. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11

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General Information
1 General Information
Symbols used in this document
DANGER
Description of an immediate situation which will result in irreversible injury or death if the warning is
ignored.
WARNING
Description of a possible situation which may result in irreversible injury or death if the warning is
ignored.
CAUTION
Description of a possible situation which may result in irreversible injury if the warning is ignored.
NOTICE
Description of a possible situation which may result in material damage if the warning is ignored.
Important information, notes and/or tips
Reference to information on the internet
1. Action step
- Action step
Consequence of an action
List
•List
Note on the use of a tool/WABCO tool
How to Obtain Additional Maintenance, Service and Product Information
If you have any questions about the material covered in this publication, or for more information about the
WABCO product line, please contact the WABCO Customer Care Center at 855-228-3203, by email at
wnacustomercar[email protected], or visit our website: www.wabco-na.com.

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General Information
WABCO Academy
https://www.wabco-academy.com/home/
WABCO online product catalog
http://inform.wabco-auto.com/
Your direct contact to WABCO
WABCO North America
1220 Pacific Drive
Auburn Hills, MI 48326
Customer Care Center: [phone]
www.wabco-na.com

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Safety Information
2 Safety Information
Provisions for a safe work environment
Only trained and qualied technicians may carry out work on the vehicle.
Read this publication carefully.
Follow all warnings, notices and instructions to avoid personal injury and property damage.
Always abide by the vehicle manufacturer’s specications and instructions.
Observe all accident regulations of the respective company as well as regional and national
regulations.
The workplace should be dry, sufciently lit and ventilated.
Use personal protective equipment if required (safety shoes, protective goggles, respiratory
protection and ear protectors).
Read and observe all Danger, Warning and Caution hazard alert messages in this publication. They provide
information that can help prevent serious personal injury, damage to components, or both.
WARNING
To prevent serious eye injury, always wear safe eye protection when you perform vehicle
maintenance or service.
WARNING
Park the vehicle on a level surface. Block the wheels to prevent the vehicle from moving. Support
the vehicle with safety stands. Do not work under a vehicle supported only by jacks. Jacks can
slip and fall over. Serious personal injury and damage to components can result.
WARNING
When you work on an electrical system, the possibility of electrical shock exists, and sparks can
ignite ammable substances. You must always disconnect the battery ground cable before you
work on an electrical system to prevent serious personal injury and damage to components.
WARNING
Remove all pressure from the air system before you disconnect any component. Pressurized air
can cause serious personal injury.

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Mounting Specifications
3 Overview
The air manifold distribution module (AMDM) consists of a mounting base that can hold up to ve electri-
cally operated air solenoid valves that can be used to operate air system accessories.
The mounting base provides a common air supply and a common electrical connector to operate the
valves. With no electrical power applied, the individual solenoid valves are in a normally closed position
(the air supply is isolated and the delivery is vented to atmosphere). When power is applied, the exhaust is
closed and air pressure is delivered.
The air pressure may be delivered to a variety of accessories including the fan clutch, air horn, suspension
dump, 5th wheel slide and inter-axle differential lock. For applications where more than ve functions are
controlled, additional AMDMs may be installed.
4 Maintenance
AMDMs require no regularly scheduled maintenance. However, they must be kept clean and free of debris
or ice build-up.
5 Mounting Specifications
The mounting location will vary according to the vehicle manufacturer’s requirements. In general, the
AMDMs must be mounted with the electrical connector in the upper right-hand corner as illustrated in
Figure 1. The AMDM must be mounted in a location that is not directly exposed to road splash, debris or
direct spray from power washers.
Fig. 1
EXHAUST
PORTS
PNEUMATIC
DELIVERY
PORTS
MOUNTING
BASE SOLENOID
VALVE
EIGHT-PIN
ELECTRICAL
CONNECTOR
PNEUMATIC
SUPPLY PORT
SOLENOID
VALVE
MOUNTING
SCREWS
AMDM WITH FOUR SOLENOID VALVES
4016941a
For technical assistance, contact the WABCO Customer Care Center at [phone].

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Troubleshooting and Testing
6 Air Lines
CAUTION
Identify the air lines before disassembly. If air lines are removed, they must be reinstalled in the
same location to avoid accidental activation of devices or activation of the wrong device.
CAUTION
Never apply voltage to the assembly except by means of the proper connector in the vehicle wire
harness.
All delivery ports are identied by number (refer to Figure 1) and delivery ttings may be identied with a
color-coded ring. Refer to the manufacturer’s service manual for color coding identication.
7 Air Supply
CAUTION
Air supply must be conrmed prior to attempting any repair or replacement of an AMDM. The air
supply is provided through a pressure protection valve. Air will not be available to the AMDM if the
supply pressure is less than the pressure protection valve setting.
Follow the standard shop procedures for your service area to conrm air supply.
8 Troubleshooting and Testing
CAUTION
When troubleshooting and testing the AMDM, do not damage the connector pins.
CAUTION
The mounting base contains diodes that are polarity sensitive and can be damaged if power is
incorrectly applied. To avoid damaging the diodes, apply power using the vehicle manufacturer’s
wire harness connector.

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Troubleshooting and Testing
8.1 Voltage Check
If one of the solenoid valves on the AMDM does not operate, test the vehicle to ensure proper voltage.
Measure the voltage on the vehicle harness connector at the vehicle connector pins, as illustrated in
Figure 2.
Voltage must be between 9.5 and 15.0 volts.
The ignition must be turned ON for this test.
Fig. 2
D C B A
H G F E
HARNESS
PIN
IDENTIFICATION
4016942a
8.2 Resistance Test
If the voltage is within the acceptable range of 9.5 to 15 volts but the valve still does not operate, test the
solenoid. Use a volt-ohm meter to check the resistance of both the valve and the module base as follows:
1. Remove the electrical connector from the module base. Select the appropriate pin numbers from
Table A and Figure 3.
Table A: Electrical Connector Pins
Station
Number
Positive
Connector Pin
Negative
Connector Pin Resistance
1EB
35-60 ohms
2FG
3DH
4CH
5AH
Fig. 3
A B C D
E F G H
AMDM PIN IDENTIFICATION
4016943a

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Troubleshooting and Testing
2. Connect the volt-ohm meter to the appropriate pins and measure the resistance. Coil resistance
must be between 35 and 60 ohms.
3. If the resistance is less than 35 ohms, the circuit may be shorted. Identify which station is causing
the short and remove the solenoid from that station. If that connector circuit remains shorted, the
base must be replaced.
If the base connector pins are no longer shorted, the solenoid valve is likely causing the short. Check
the resistance across its pins. If that check results in a resistance less than 35 ohms, the solenoid
valve must be replaced.
8.3 Air Leakage Test
If the voltage and resistance are within the acceptable ranges (9.5-15 volts/35-60 ohms resistance) but
the valve does not deliver air, inspect the air supply. A pressure-protected air circuit provides air to the
valve and the valve will not function unless the reservoir pressure exceeds the pressure protection setting,
typically 85 psi (585 kPa).
Excessive leakage may also be a reason for replacing the solenoid valve module. The source of a supply
line leak may not be readily apparent because all valves are vented through two common exhaust ports.
Check for air leakage from the assembly as follows:
1. Apply a soap and water leakage detection uid to all potential leakage sites on the front and sides of
the valve.
2. If no leakage is found on the front and sides of the valve, loosen the two mounting screws that attach
the assembly to the vehicle and inspect for leaks from the back side of the assembly. Figure 4.
Fig. 4
4016944a
3. Replace the leaking solenoid valve (refer to Replacement Procedures).
8.4 Valve Check
CAUTION
The mounting base contains diodes that are polarity sensitive and can be damaged if power is in-
correctly applied. To avoid damaging the diodes, apply power using the vehicle manufacturer’s wire
harness connector.
Solenoid valves mounted on the module base may be inspected individually as follows:
1. Drain the air from the system.
2. Disconnect the air supply and electrical connector.
3. Remove the two screws that hold the solenoid valve to the mounting base. Pull the solenoid valve
directly off the base. Be careful to locate the air supply and electrical connector O-rings.
4. Test the solenoid function by applying voltage to the two electrical pins on the valve. With voltage
(9.5-15 vdc) applied, listen for the solenoid actuation. Do not disassemble further.
5. If the solenoid valve does not function, replace the entire solenoid valve. Refer to Replacement
Procedures.