3 Diagnostics, Troubleshooting and Testing
27
Meritor WABCO Maintenance Manual MM-0112 (Revised 07-05)
Reset Memorized
Select Reset Memorized from the pull down menu to tell the ECU
to reset the memorized or “learned” components.
The ECU has the ability to learn the following components: ATC
valve, engine datalink and retarder relay. Once any of these have
been detected, the ECU expects to see them each time the ECU is
powered on. If they are not seen, the ECU records a fault.
Because there are times when an ECU is moved to another
vehicle — or during diagnostic testing — you may want the ECU to
disregard these learned components. Use the Reset Memorized
command for this purpose.
Pro-Link
®
Plus Display
With some ECUs, the Pro-Link
®
Plus will display system
information — components or options supported by the ECU.
Access these screens through System Setup (main ABS menu).
The following screens illustrate:
앫 A 4S/4M ABS/ATC system
앫 Where the ECU has not recognized a retarder relay
앫 Where the ECU has recognized a J1939 datalink
앫 The ECU is capable of supporting ABS and ATC switches.
NOTE: Yes indicates the ECU is capable of supporting these
options. These may or may not be installed on the vehicle.
Component Test Screens
These screens help you test ABS components. Select this function
from the Tractor ABS/ATC menu.
ABS VALVES
ATC
ABS INDICATOR LAMP
ATC INDICATOR LAMP
ABS/ATC SWITCHES
SENSORS
ENGINE DATALINK
RETARDER RELAY
RETARDER DATALINK
VEHICLE VOLTAGES
Select the appropriate function. Each screen has instructions to
guide you through the test. Refer to the Pro-Link
®
Plus Manual for
complete instructions.
Component Tests and Functions (Pro-Link
®
Plus)
These screens help you test ABS components. Select this function
from the Tractor ABS/ATC menu.
Select the appropriate function. Each screen has instructions to
guide you through the test. Refer to the Pro-Link
®
Plus Manual for
complete instructions.
TRACTOR ABS/ATC
SYSTEM INFORMATION
SENSORS
MODULATORS
4
4
ATC VALVE
RETARDER RELAY
J1939
ABS SWITCH
ATC SWITCH
YES
NO
YES
YES
YES
TRACTOR COMP TESTS
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↑ VEHICLE VOLTAGES ↓
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