139
Herein, the length of lamp connection with storage battery minus determines information
display mode (if the lap is connected with battery minus 3-6.3 sec, systematic mode is activated).
After pushing ABS test button during the time specified,
“Tractor ABS” indicator is on for about 0.5 sec to confirm that the ground was registered and re-
ceived by the electronic control unit.
Herein, if the electronic unit registers new error appeared during reading, or if the warn-
ing lamp is connected to battery minus for over 6.3 sec, the system will exit test mode. If “Tractor
ABS” indicator was connected to the battery minus for over 15 sec, it is registered that “Tractor
ABS” indicator is broken.
If when ignition is switched on, any active error is registered, at test mode activation the
control unit will display only this error, if several active errors are registered, active mistake regis-
tered last will be displayed at test mode.
To exit test mode switch on/off the ignition, or the truck should be moving (signal
from speed sensor from several axles).
If no active error is registered when the ignition is switched on, passive mistake (not pre-
sent in the system at the moment) will be displayed in an order reverse to their appearance (the
last goes first, the first goes last). Herein, error number does not show error appearance sequence.
Passive errors stop to be displayed, when the last passive error registered in the control unit
memory is displayed.
List of error codes for Wabco and troubleshooting are given in Tables 15 and 16.
If the warning lamp does not fade out after the failure is eliminated, apply to the service
centre.
When repairing and eliminating failures, stop the engine and switch off the system. The
system is switched off when the key is turned in the ignition, the devices are in “SWITCHED
OFF” position and “ground” is off.
When welding is performed at the truck, disconnect plugs from the electronic con-
trol unit.
Table 15 - Errors Described by Blink Codes for Wabco
First code series of error message
Second code series of error message
1
No errors
1
No errors
2
Modulator
1
Front right
3
Sensor (large backlash between the sensor
and the toothed rotor)
2
Front left
4
Sensor (closing or breakage)
3
Rear right
5
Sensor (intermittent signal)
4
Rear left
6
Toothed rotor
5
Third axle right
6
Third axle left
8
Electronic control unit
1
Low source voltage
2
High source voltage
3
Internal error
4
Configuration error
5
Connection to the storage battery minus
Summary of Contents for 4320M
Page 1: ...URAL 4320М TRUCK and its Modifications ...
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Page 177: ...Figure 140 Installation of left and right side safety devices 171 ...
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