New Holland WorkMaster 50 Service Manual page 953

B. If there is no continuity, leave connectors X-9011 and X-9001 disconnected and continue to Step 4.
4. Check the throttle valve actuator Z-9001 engine harness (EN) wiring for a short circuit condition.
With the key in the OFF position, use a multimeter to perform the following continuity check for a short circuit on
the engine harness (EN) side :
From
X-9011 pin 6
X-9011 pin 6
X-9011 pin 2
A. If there is continuity, there is a short circuit in the throttle valve actuator Z-9001 engine harness (EN) h-bridge
circuit. Locate and repair the shorted conductor.
B. If there is no continuity, leave connectors X-9011 and X-9001 disconnected and continue to Step 5.
5. Check the throttle valve actuator Z-9001 vehicle harness (VE) h-bridge circuit for a short to high source condition.
With the key in the OFF position, use a multimeter to perform the following continuity check on the vehicle harness
(VE) side :
From
X-9001 pin A49
X-9001 pin A34
A. If there is continuity, there is a short circuit in the throttle valve actuator Z-9001 engine harness (EN) h-bridge
circuit. Use the appropriate service manual, if necessary, to locate and repair the shorted conductor.
B. If there is no continuity, leave connector X-9011 disconnected and continue to Step 6.
6. Replace the throttle valve actuator Z-9001.
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A. If the fault is no longer active, return the machine to service.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 service manual 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 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-9011 pin 2
X-9011 pin 1
X-9011 pin 1
To
All pins in connector X-9001
All pins in connector X-9001
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55.12 [55.DTC] / 232
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.