![background image](http://html1.mh-extra.com/html/fendt/favorit-900/favorit-900_workshop-manual_40018701144.webp)
Fav 700
Fav 900
Hydraulics / Valve assemblies
Control valves SB 23 LS - EHS / Emergency mode
A
General
Fav 900 chassis number 23/3001 and up
10/1999
9620
000002
A
b
3/6
Capitel
Docu-No.
Index
Date
Version
Page
Control valves SB 23 LS - EHS / Emergency mode
PM-Picturemodule
Text-module
Text-module
The spool valves have four connecting leads:
Bullet-List
●
Pin 1 +Ub (connected via relay K 011 up to 714/716..../21/2000).
●
Pin 2: Can -
●
Pin 3: Can +
●
Pin 4: earth
Text-module
The valve supply and also the hydr. pilot pressure (pst.) of 22 bar (connected via pressure-reducing
valve Y032 in the end plate EP) are only connected with the engine running.
When the engine is switched off, therefore, a valve can only be actuated via mechanical emergency
control directly at the valve.
As far as valve diagnostics is concerned, this means that the power supply and the CAN-bus can only
be tested (Fendias notebook) with the engine running.
Self-testing of the valves is transmitted to the ECU (e-box) solely via the CAN and then forwarded to
the instrument panel (fault code).
Valve operation can be monitored visually using the LED on the valve connector. In the event of a fault,
flashing codes are emitted in accordance with the Bosch coding system (see table).
Verification is possible by supplying Ub 12 V directly to the valve.
Bullet-List
●
Pin 1 = Ub
●
Pin 4 = earth
If flashing code [1 pause 1] - only with direct power supply - appears, this means that the valve's
electronics system is basically OK.
Text-module
"Flashing code" fault code table
PMTAB_Picture
A
Pressure governor
E
Diagnostics: optical display; fault signal
B
Shutoff valve
F
Inductive position sensor
C
Control pressure 22 bar
G
CAN setpoint
D
Pilot valve