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Fav 900
Engine / Systems
Trouble shooting program EDC
B
Faults
Fav 900 chassis number 23/3001 and up
16.11.2000
2000
000001
B
b
15/72
Capitel
Docu-No.
Index
Date
Version
Page
Trouble shooting program EDC
Speed sensor EDC B025 (Test 3)
Failure Code (Fendt):
1.2.84
Text-module
Failure location (MAN):
84
Text-module
Failure display :
Message on Dashpanel
Text-module
Failure path:
Speed Sensor
- Statically not plausible
- Dynamically not plausible
Text-module
Consequences:
Full power flow reduced by 25-40%
Reduced maximal speed 1800 Rpm.
System switches from injection start Control to predefined injection start caracteristic.
In case of error of correspondance of pump speed sensors, engine will stop
Text-module
Possible Origin:
Wire disruption, short circuit, Speed sensor failure. Wrong signal through metallic chips , e.g.nxt to the
installatin Place; Distance to fly wheel not OK? EDC Control module is not OK,
Text-module
Test Conditions:
Adaptor Box with Adaptor Connectors , connected
Diagnostic Program
Text-module
Use wiring diagrams wich are corresponding to the tractor
Fendt Component Identification:
B025 (Speed Sensor)
Fendt Connector Identification:
X172 (Speed Sensor), 1: Earth, 2: Signal
Text-module
Remark:
Occurs simultaneously with FC 1.2.B7
Test
Measurement
Trouble shooting
Resistance
Check Resistance with Adaptor Box and
adptor Cable between Pin A1 (+) and Pin
A13 (-) to EDC Control Module A021,
Connector X047
- Record Failure and ambient
Parameters with FENDIAS
- Delete Failure Code Memory with
FENDIAS
Requested Value: 770 - 1000 Ohm
- Check again with FENDIAS
- Check Wiring
- Check Connectors
- if no Failure can be identified,
replace Speed Sensor
Speed Signal
Check Signal with Adaptor Box and ad-
aptor Connectors between Pin A1 (+)
and Pin A13 (-) to EDC Control Module
A021, Connector X047 with Oscillo-
graph . Number of holes in the Flywheel:
6
- Record Failure and ambient
Parameters with FENDIAS
- Delete Failure Code Memory with
FENDIAS
- Check again with FENDIAS
Requested Value:
- Check Wires
Speed 1200 Rpm; Frequency = 120Hz
- Check Connectors