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Hyundai Equus: Fuel Pump Repair procedures - Fuel Delivery System - Engine Control/Fuel System - Hyundai Equus VI 2009-2020 Service ManualHyundai Equus: Fuel Pump Repair procedures

Removal
1.
Release the residual pressure in fuel line.
(Refer to Fuel Delivery System - "Release Residual Pressure in Fuel Line")
2.
Folding the rear seat cushion.
3.
Remove the fuel pump service cover (A) after loosening the screws.

4.
Disconnect the fuel pump connector (A) and fuel pressure connector (B).

5.
Disconnect the fuel feed tube quick-connector (A) and the suction hose (B).
6.
Remove the fuel pump from the fuel tank after removing the installation bolts (C).

Installation
1.
Install in the reverse order of removal.

Fuel pump plate cover installation bolt :
2.0 ~ 2.9 N.m (0.2 ~ 0.3 kgf.m, 1.4 ~ 2.2 lbf.ft)

   
When installing the fuel pump module, be careful not to get the seal-ring entangled.
Inspection
[Fuel sender]
1.
Turn ignition switch OFF and disconnect the negative (-)battery cable.
2.
Remove the fuel pump assembly.
(Refer to Fuel Delivery System - "Fuel Pump")
3.
Using an ohmmeter, measure the resistance between terminals 5 and 6 of sender connector (A) at each float level.

Pin No.
Description
1
Fuel pump (U) phase control
2
Fuel pump (V) phase control
3
Fuel pump (W) phase control
4
Ground
5
Fuel sender signal
6
Fuel sender ground

4.
Check that the resistance is within the specification.
Position
Resistance (x)
Capacity (x)
L
88.9 ~ 90.9
6
 1/4
29.9 ~ 31.9
24
 1/2
3 ~ 5
40
H
3 ~ 5
74

   
Х
[Main fuel sender + sub fuel sender synthesis of resistance]
Position
Resistance (x)
Capacity (x)
L
190 ~ 202
6
 1/2
97 ~ 101
38
H
6 ~ 10
74

[Fuel pump three phase coil inspection]
1.
Turn ignition switch OFF and disconnect the negative (-)battery cable.
2.
Remove the fuel pump assembly.
(Refer to Fuel Delivery System - "Fuel Pump")
3.
Using an ohmmeter, measure the resistance between terminals U-V, V-W, W-U.
4.
Check that the resistance is within the specification.

Specification: 0.09 ~ 0.13 x

Pin No.
Discription
1
Fuel pump (U) phase control
2
Fuel pump (V) phase control
3
Fuel pump (W) phase control
4
Ground
5
Fuel sender signal
6
Fuel sender ground

[Fuel Pump]
1.
Turn ignition switch OFF and disconnect the negative (-)battery cable.
2.
Remove the fuel pump assembly.
(Refer to Fuel Delivery System - "Fuel Pump")
3.
Connect the fuel pump connector (A) and fuel pressure sensor connector (B).

4.
Reconnect the negative (-) battery cable.
5.
Turn ignition switch ON or cracking at the no-load state.
6.
Operate the fuel pump.
   
Х
Cranking the Max. 3sec.
7.
Check the normal state of the fuel pump.
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