New Holland WorkMaster 50 Service Manual page 886

B. If there is no voltage, leave connector X-9007 disconnected and continue to Step 4.
4. Check the fuel metering unit Y-9000 low side driver engine harness (EN) wiring for a short circuit condition.
Disconnect the engine harness (EN) from the ECU A-9000 at connector X-9001.
With the key in the OFF position, use a multimeter to perform the following continuity check from the engine har-
ness (EN) side :
From
X-9001 pin A60
A. If there is continuity, there is a short circuit condition in the fuel metering unit Y-9000 low side driver engine har-
ness (EN) wiring. Use the appropriate service manual, if necessary, to locate and repair the shorted conductor.
B. If there is no continuity, check the ECU A-9000 for the appropriate software and re-flash, if necessary.
5. Visually inspect the relevant harnesses and connectors for damage, bent or dislocated pins, corroded terminals,
or broken wires. Verify that the connectors are fully installed. Flex the harnesses involved to reveal intermittent
breaks or shorts in the wiring concerned. Operate the machine while you monitor the display.
A. If you find damage or the display indicates other than normal display readings, then repair the damage discov-
ered during the inspection or locate and repair the other than normal display condition and verify that the error
has been resolved.
B. If you do not find damage and the display indicates only normal readings, then erase the fault code and continue
operation.
Wiring harnesses - Electrical schematic sheet 03 – Engine sensors and fuel injection (engine schematics)
(55.100.DP-C.20.E.03)
Electrical systems - FAULT CODES
To
All pins in connector X-9001 pin A60 There should be no continuity.
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55.12 [55.DTC] / 165
Value