Turn ignition switch OFF and disconnect the negative (-)battery cable.
Remove the fuel pump assembly.
Check motor operation by fuel pump connector (A) connecting power (No.2) and ground (No.4).

| Pin No. | discription | 
| 1 | Fuel sender signal | 
| 2 | Fuel pump (+) | 
| 3 | Fuel sender ground | 
| 4 | Fuel pump (-) | 
Using an ohmmeter, measure the resistance between terminals 1 and 3 of sender connector (A) at each float level.

| Pin No. | discription | 
| 1 | Fuel sender signal | 
| 2 | Fuel pump (+) | 
| 3 | Fuel sender ground | 
| 4 | Fuel pump (-) | 
Also check that the resistance changes smoothly when the float is moved from "E" to "F".
| Position | Resistance (Ω) | Capacity (ℓ) | 
| E | 197 ~ 203 | 2.8 | 
| 1/2 | 64.2 ~ 68.2 | 22.3 | 
| F | 6 ~ 10 | 41.8 |