Club Car Carryall 550 2015 Maintenance And Service Manual page 318

18
Test Procedures
4.1. The reading should be approximately 2 to 5 ohms. If the reading indicates no resistance, the fuel pump has
failed and the fuel pump module must be replaced. See Fuel Pump Module Removal on page 23-18.
4.2. If the reading is correct and the fuel pump does not function correctly, check the continuity of the red wire
from the fuel pump to the red wire of the black 18-pin ECU connector. This red wire contains sonic weld 7.
Leave the battery disconnected while checking continuity. Also, check the continuity of the brown wire
from the fuel pump to the brown wire of the black 18-pin ECU connector. See Fuel Gauge/Hour Meter
Removal on page 20-24.
TEST PROCEDURE 22 – Fuel Level Sending Unit
See General Warnings on page 1-1.
WARNING
• To avoid the possibility of fire or explosion, make sure the fuel tank cap is securely in place while
performing this test procedure.
NOTE: This is a resistance test.
1. If necessary, see Testing Basics on page 18-14.
2. Disconnect battery. See Disconnecting the Battery – Gasoline Vehicles, Section 1, Page 1-4.
3. Disconnect the 5-pin connector from the top of the fuel pump module.
4. Probe between pin (3) and pin (4) terminals in module (Figure 18-20, Page 18-37).
5. The following resistance readings (in ohms) should be obtained depending on the position of the float inside
the fuel tank. The resistance reading will vary according to the exact position of the float. The chart below may
be used as a guideline to determine if the fuel level sending unit is operating correctly. Make sure the float
is at the surface of the fuel in the tank.
FLOAT POSITION
Lower position (tank empty)
Center position (tank half full)
Upper position (tank full)
6. If the readings are within the specifications listed above, the fuel level sending unit is working properly. If the
readings are incorrect, the fuel level sending unit has failed and the fuel pump module must be replaced. See
Fuel Pump Module Removal on page 23-18.
7. If the readings are correct and the fuel gauge does not function correctly, check the continuity of the orange/black
wire from the fuel level sending unit to the purple wire on the fuel gauge/hour meter. Leave the battery
disconnected while checking continuity. Also check the continuity of the red/white wire from the fuel gauge/hour
meter to the brown/white wire on the key switch, and the black ground wires at the fuel level sending unit and at
the fuel gauge/hour meter. See Fuel Gauge/Hour Meter Removal on page 20-24.
8. If the readings are correct according to the position of the float, but give an incorrect reading on the fuel
gauge/hour meter, test the fuel gauge/hour meter. See Fuel Gauge on page 18-39.
Page 18-38 2015 Carryall 550 Maintenance and Service Manual
TROUBLESHOOTING AND ELECTRICAL SYSTEM:
RESISTANCE READING
250 ohms (±10)
141 ohms (±8)
33.3 ohms (±6)
PEDAL-START GAS VEHICLE
FUEL GAUGE READINGS
Empty
Half full
Full