3 Diagnostics, Troubleshooting and Testing
32
Meritor WABCO Maintenance Manual MM-0112 (Revised 07-05)
Dynamometer Testing Vehicles with ATC
WARNING
The automatic traction control (ATC) function must be disabled
before any type of dynamometer testing is conducted on the
vehicle. If the ATC is not disabled, the vehicle ATC may actuate
and cause the vehicle to move forward without warning to the
operator. If the vehicle moves forward unexpectedly, the
vehicle may cause damage or injuries to individuals who are in
the path of the vehicle.
CAUTION
Do not cycle the vehicle ignition while the vehicle is on a
dynamometer. Cycling the vehicle ignition will enable the ATC.
Vehicles with ATC must have the ATC disabled to test the vehicle on
a dynamometer. To disable the ATC, use one of the following
methods:
1. Blink Code Switch
Press and hold the blink code switch for at least three seconds.
Refer to the blink code diagnostics information in this section
for a description of how the blink code display will appear.
앫 Once the system configuration code begins, ATC has been
disabled.
앫 The ATC lamp comes on and stays on while ATC is
disabled.
앫 ATC will remain disabled until the vehicle ignition is cycled.
앫 After testing, ATC will automatically reactivate the first time
the vehicle ignition is cycled.
2. Remove Power
Remove the ABS circuit breaker/fuse or remove the ECU power
connector to disable the ABS and ATC.
앫 After testing, re-install the circuit breaker/fuse and the ATC
will automatically reactivate the first time the vehicle power
is applied to the ECU.
3. TOOLBOX™ Software
At the ABS Main Menu, select the Disable ATC icon or use the
pull down menu to send the command to the ECU to disable
the ATC. Refer to the TOOLBOX™ Software Owner’s Manual
for complete instructions for using TOOLBOX™.
앫 ATC will remain disabled until the enable command is sent
or the vehicle ignition is cycled.
앫 After testing, ATC will automatically reactivate the first time
the vehicle ignition is cycled.
4. MPSI Pro-Link
®
Plus
Refer to the MPSI Pro-Link
®
Plus Owner’s Manual for
instructions.
앫 ATC will remain disabled until the enable command is sent
or the vehicle ignition is cycled.
앫 After testing, ATC will automatically reactivate the first time
the vehicle ignition is cycled.
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