Fault Code Inst 11011 - New Holland T8010 Manual

Fuel Level Sensor Signal Too Low
Cause:
Fuel level sensor signal voltage out of range low (The signal was below 0.125 volts for 1 second).
Possible failure mode:
1. Fuel level sensor failure.
2. Fuel level sensor wiring harness problems.
3. Instrument controller failure.
Solution:
Check the fuel sensor resistance and the wiring from the instrumentation controller to the fuel level sensor.
1. Test the resistance of the fuel level sensor: Locate the fuel level sensor on the top of the fuel tank.
Disconnect connector C066 from the fuel level sensor. Clean the connection. Clean the mating pin and
connector. Inspect pin A,B, and C in the connector.
Clean the connection. Clean the mating pin and the connector.
Validate that the sensor is getting 8 volts at its power supply input at pin A.
If there is 8 volts, go to step 2.
If not, then check for 8 volts out of the instrument controller pin 21 at connector CN-2.
If there is not 8 volts at the controller, pull pin 21 terminal out to determine if 8 volts is present on the controller
pin when pin wire 21 is not connected.
NOTE: Use the correct tool to remove pins from connectors.
If 8 volts is present, then go to step 4 and check for shorts to ground in the harness.
If there is not 8 volts, then replace the instrument controller.
2. Check the sensor ground.
Measure the continuity between pin C of connector C066 and the chassis ground. If there is good continuity
(less than 1 ohm), go to the next step.
If there is not good continuity, go to step 4.
3. Check the function of the fuel level sensor.
Validate that the sensor output voltage is greater that 0.125 volts at pin B of connector C066.
The power supply to the fuel sensor is 8VDC from connector CN-2 cavity 21 of the instrument controller. When
the fuel tank is empty, the fuel level signal from pin B should be around 0.25 V. When the fuel tank is full, the
fuel level signal from pin B should be around 4.50 V. A straightforward way of testing the fuel sender is to put
the sender into a tall oil container and watch the voltage change when the sender is at different depths.
If the signal is out of range, replace the fuel level sender.
If the signal is within range, validate that the voltage signal is present at the instrument controller input pin 22 at
connector CN-1.
If no voltage is present at the controller, locate and repair an open circuit in the wire harness signal line.
4. Check the wiring from the fuel level sensor connector C066 to both connectors CN-1 and CN-2 at the
instrument controller. There should be 8 VDC power at supply pin A of C066 when the tractor key is in the ON
position. There should be good continuity between pin C of C066 and the clean ground.
There should be good continuity between pin B of connector C066 and pin 22 of connector CN-1.
There should be good continuity between pin A of connector C066 and pin 21 of connector CN-2. If there is any
open circuit, check the continuity from connector C066 to C060 to CN-1 and CN-2 at controller to locate the
problem.
NOTE: Always inspect connector ends for damaged, bent or dislocated pins when troubleshooting.
NOTE: See schematic sections 24, 25 and 26 on the schematic poster.
Section 55 - Electrical System, Controller - Chapter 2

FAULT CODE INST 11011

55-2-12