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
26/72
Capitel
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Trouble shooting program EDC
Needle Motion Sensor r B026 (Test 11)
Failure Code (Fendt):
1.2.1A
Text-module
Failure location (MAN):
1A
Text-module
Failure display :
Message on Dashpanel
Text-module
Failure Path:
Needle Motion Sensor (B026)
- Signal Amplitude to low
- Insufficient pulses
- To many Impulses
- Internal Resistance not OK
Text-module
Consequences:
System switches from Control Mode to Start of Injection Control.
If failure diappears, System will switch automatically back to Control Mode.
Text-module
Possible Origin:
Wiring Disruption, Short Circuit, Needle Motion sensor Failure
Failures in pulses from Primary speed Sensor (XXXX) ( even without Failure Code)
Disturbance Pulses between (XXXX) Control Module and Needle Motion Sensor (e.g. by switching a
Relay)
Disturbance pulses on Needle motion Sensor due to Mecanical Failures (e. g. Valve control, Pistons)
Stuck Injector Needle
Leaks or Air within System
Fuel Lifting Pump failure
Contaminated Fuel Filter
Clogged fuel lines
Empty fuel Tank
Injection Pump Failure
Text-module
Test Conditions:
Adaptor box with adapting connectors connected
Text-module
Use wiring diagrams wich are corresponding to the tractor
Fendt Component identification:
B026 (Needle Motion Sensor)
Fendt Connector Identification:
X173 (Needle Motion Sensor), 1: Signal, 2: Earth
Test
Measurement
Trouble shooting
Internal resistance
Check Resistance with adaptor box with
adaptor Connectors between Pin A29
and Pin A15 on Control Module A021,
Connector X047
- Record Failure and ambient Para-
meters with FENDIAS
- Delete Failure Code Memory with
FENDIAS
Requested value: 65 - 160 Ohm
- Check again witth FENDIAS
Failure Conditions: No indications
- Check wiring
- Check Connectors
- Replace Needle Motion Sensor