New Holland WorkMaster 50 Service Manual page 748

From
X-9005 pin 1
A. If the specified values are measured, leave connector X-9005 disconnected and continue to Step 4.
B. If the specified values are not measured, there is a short to battery or switched battery in the fuel temperature
sensor B-9002 wiring. Use the appropriate service manual, if necessary, to locate and repair the failed con-
ductor.
4. Check the fuel temperature sensor B-9002 engine harness (EN) wiring for an open circuit condition.
Disconnect the engine harness (EN) from the ECU A-9000 at connector X-9001.
With the key in the OFF position, use the a multimeter to perform the following continuity check on the engine
harness (EN) side :
From
X-9005 pin 1
X-9005 pin 2
A. If there is continuity, leave connectors X-9005 and X-9001 disconnected and continue to Step 5.
B. If there is no continuity, there is an open circuit in the fuel temperature sensor B-9002 wiring in the engine
harness (EN). Locate and repair the broken conductor.
5. Check the fuel temperature sensor B-9002 engine harness (EN) wiring for a short circuit condition.
With the key in the OFF position, use the a multimeter to perform the following continuity check on the engine
harness (EN) side :
From
X-9001 pin A38
A. If there is continuity, there is a short circuit in the fuel temperature sensor B-9002 wiring in the engine harness
(EN). 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.
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
Chassis ground
To
X-9001 pin A38
X-9001 pin A23
To
All pins in connector X-9001
47866583_ 02/12/2015
55.12 [55.DTC] / 27
Value
There should be less than 5.5 V.
Value
There should be continuity.
There should be continuity.
Value
There should be no continuity.