Kia Optima: Inspection - Fuel Pump. Repair procedures - Fuel Delivery System - Engine Control/Fuel System - Kia Optima TF 2011-2026 Service ManualKia Optima: Inspection

[Fuel pump]

1. Turn the ignition switch OFF, and then remove battery (-) cable.
2. Remove the fuel pump assembly.
3. Check motor operation by fuel pump connector (A) connecting power (No.4) and ground (No.5).

Pin No.
Description
1
Fuel sender ground
2
 -
3
Fuel sender signal
4
Fuel pump motor (+)
5
Fuel pump motor ground

[Fuel sender]
1. Turn the ignition switch OFF, and then remove battery (-) cable.
2. Remove the fuel pump assembly.
3. Using an ohmmeter, measure the resistance between terminals 1 and 3 of sender connector (A) at each float level.

Pin No.
Description
1
Fuel sender ground
2
 -
3
Fuel sender signal
4
Fuel pump motor (+)
5
Fuel pump motor ground

4. Also check that the resistance changes smoothly when the float is moved from "E" to "F".

Position
Resistance(Ω)
Capacity (ℓ)
E
198~205
5
Warning lamp
168~172
8.5
 1/2
65~67
37.5
Sender (F)
7~9
68


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...

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