New Holland WorkMaster 50 Service Manual page 730

From
X-9125 pin 1
X-9125 pin 2
X-9125 pin 3
Then use the multimeter to perform the following tests, on the vehicle (VE) harness from :
From
X-9125 pin 1
X-9125 pin 1
X-9125 pin 2
Then use the multimeter to perform the following tests, on the vehicle (VE) harness from :
From
X-9125 pin 1
X-9125 pin 3
A. If the results are not as expected for any of the wiring tests listed above, there is an open, short or grounded
circuit condition in the vehicle harness (VE) wiring. Use the appropriate vehicle service manual and schematics
to diagnose and repair the wiring.
B. If the results are as expected in all of the wiring tests listed above, the wiring is ok. Leave connectors X-9102
and X-9125 disconnected and continue with Step 5.
5. Check for key switch voltage supply to water in fuel switch S-9102.
With the key switch in an ON position, use a multimeter to perform the following test, on the vehicle (VE) harness
side from :
From
X-9125 pin 3
X-9125 pin 1
A. If there is key switch voltage present in the first check and not present in the second check, continue with Step
6.
B. If key switch voltage is not present in the first check or present in the second check, use the appropriate vehicle
service manual and schematics to diagnose and repair the wiring.
6. Replace the water in fuel switch S-9102, then check to see if this fault has been resolved.
A. If the fault is resolved, return the machine to service.
B. If the fault is not resolved, check the ECU A-9000 for the appropriate software and re-flash, if necessary.
7. 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 readings, then repair the damage discovered
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 02 – Engine Control Unit (ECU) power and after treatment
system (engine schematics) (55.100.DP-C.20.E.02)
Electrical systems - FAULT CODES
To
X-9102 pin K88
Chassis ground
X-9102 pin K01
To
X-9125 pin 2
X-9125 pin 3
X-9125 pin 3
To
Chassis ground
Chassis ground
To
Chassis ground
Chassis ground
47866583_ 02/12/2015
55.12 [55.DTC] / 9
Value
There should be continuity.
There should be continuity.
There should be continuity.
Value
There should be no continuity
There should be no continuity
There should be no continuity
Value
There should be no continuity
There should be no continuity
Value
There should be key switch voltage.
There should be no key switch
voltage.