New Holland WorkMaster 50 Service Manual page 752

From
X-9026 pin 2
X-9026 pin 3
A. If there is no continuity, there is an open circuit in the rail pressure sensor B-9004 engine harness (EN) wiring.
Locate and repair the broken conductor.
B. If there is continuity, leave connectors X-9026 and X-9001 disconnected and continue to Step 4.
4. Check the rail pressure sensor B-9004 engine harness (EN) wiring for a short to a voltage source.
With the key in the OFF position, use a multimeter to perform the following continuity check on the engine harness
(EN) side :
From
X-9026 pin 2
X-9001 pin A41
A. If there is continuity, there is a short circuit in the rail pressure sensor B-9004 engine harness (EN) wiring.
Locate and repair the shorted conductor.
B. If there is no continuity, leave connector X-9026 disconnected and continue to Step 5.
5. Replace the rail pressure sensor B-9004.
Use the Electronic Service Tool (EST) to check the status of this fault.
A. If the fault is no longer active, return the machine to service.
B. If the fault is still active, check the ECU A-9000 for the appropriate software and re-flash, if necessary.
6. 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
X-9001 pin A41
X-9001 pin A11
To
X-9026 pin 3
All pins in connector X-9001
47866583_ 02/12/2015
55.12 [55.DTC] / 31
Value
There should be continuity.
There should be continuity.
Value
There should be no continuity.
There should be no continuity.