GASOLINE VEHICLE - TROUBLESHOOTING
AND ELECTRICAL SYSTEM
Test Procedures
18
3.
Disconnect the 5-pin connector from the top of the fuel pump module.
4.
Probe between pin (1) and pin (2) terminals in module
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 21-20.
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 11.
Leave the battery disconnected while checking continuity. Also, check the continuity of the black/white wire
from the fuel pump to the black/white wire of the black 18-pin ECU connector.
TEST PROCEDURE 21 – Fuel Level Sending Unit
See General Warnings on page 1-2.
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 18-10.
2.
Disconnect battery.
See Disconnecting the Battery- Gasoline Vehicles on page 1-3.
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
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
RESISTANCE READING
FUEL GAUGE READINGS
Lower position (tank empty)
250 ohms (±10)
Empty
Center position (tank half full)
141 ohms (±8)
Half full
Upper position (tank full)
33.3 ohms (±6)
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.
Fuel Pump Module Removal on page 21-20.
7.
If the readings are correct and the fuel gauge does not function correctly, check the continuity of the orange wire
from the fuel level sending unit to the orange wire on the fuel gauge/hour meter. Leave the battery disconnected
while checking continuity. Also check the continuity of the blue wire from the fuel gauge/hour meter to the blue
wire on the key switch, and the black ground wires at the fuel level sending unit and at the fuel gauge/hour meter.
8.
If the readings are correct according to the position of the float, but give an incorrect reading on the fuel gauge,
test the fuel gauge.
2019 Precedent Villager 2 Maintenance and Service Manual
Page 18-33
Содержание Precedent Villager 2
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Страница 20: ...Pagination Page 1 General Warnings SAFETY Page 1 6 2019 Precedent Villager 2 Maintenance and Service Manual...
Страница 46: ...Pagination Page 4 Rear Body BODY AND TRIM Page 4 16 2019 Precedent Villager 2 Maintenance and Service Manual...
Страница 328: ...Pagination Page 20 Snubber GASOLINE VEHICLE ENGINE Page 20 16 2019 Precedent Villager 2 Maintenance and Service Manual...
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