B1723

Fuel level sensor,
shorted to ground(B1722)
open circuit (B1723)

Fault symptom
Fuel gauge shows zero.
The fuel warning lamp is lit.
The range arrow flashes.

Action
1 Unplug the tank unit connector and check the resistance between tank unit pins 3 and 4.

The resistance should be 25 - 370 Ohms.

If the resistance is incorrect, change the fuel level sensor.
2 If the resistance is correct, check the voltage on pin 3 in the connector to the tank unit. The instrument should show battery positive voltage. If the voltage is incorrect, check the cable assembly for open/short circuit to ground. Localize and remedy the fault.
3 Check that pin 4 in the connector to the tank unit is grounded by measuring between pin 4 in the connector to the tank unit and pin 26 on the Electronic Display Unit (EDU) control module connector. If the instrument shows a resistance, there is a break in the lead. Localize and remedy the fault.
4 If the fault remains, proceed to "Action Before Changing A Control Module".


WARNING
Make sure that the locking pin for the fuel connections to the pump is installed.
Otherwise, the fuel connections can become detached and gasoline spray out when the engine is started.