UDRF01.04GB
Maintenance manual DRF 400–450
8 Control system – 8.4 Diagnostics
15
8.4
Diagnostics
page
–
Diagnostic test, general
The machine has built-in functions for troubleshooting called diag-
nostic test. The diagnostic test consists of several menus that are
shown on the display. The menus are grouped for faster access.
The following pages contain compilations of diagnostic menus. In
the Workshop manual there are more detailed descriptions of each
diagnostic menu.
The diagnostic test is divided into the following groups:
•
CAN/POWER, menu overview page 18
•
•
•
CLIMATE, menu overview page 21
•
•
•
•
•
•
•
EXTRA
–
–
SLIDING-CAB, menu overview page 28
–
SUPPORT-JACKS, menu overview page 29
–
EL-STEERING, menu overview page 30
•
HIST (not used)
page
–
Diagnostic menu, description
1. DIAG = Diagnostic menus
2. Menu group (CAB = cab functions)
3. Menu number
4. Total number of menus in loop
5. Signal value
6. Variable
7. Menu heading
The diagnostic tests are built up of menus. The menus are grouped
according to logical areas. With the diagnostic menus it is possible
to read how a control unit interprets input signals as well as what
output signals it sends.
Signal values (position 5) in the menu indicate measured values for
the control unit in question. Control units have internal voltmeters
and ammeters that measure the signal on the connections out to
components or in from components.
Output signals are triggering of solenoid valves, lights, relays, etc.
Input signals are sensor values, signals from controls and switches,
feedback control signals, etc.
The figure shows an example of a menu, here for diagnosis of wind-
shield wiper. The table below indicates what can be read out from
the menu figure.
DIAGNOSIS
CAN/POWER
LIGHTS CAB
CLIMATE HYD ENGINE
TRANSM BOOM ATTACH
OP EXTRA HIST
000084
FRONT WIPER
SWITCH (1-3)
OUTPUT
FEEDBACK
2
11
0
DIAG CAB 2(10)
1
7
5
6
004856
2
3
4
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