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Hyundai Equus: Air Lumber Support Switch Repair procedures - Seat Electrical - Body Electrical System - Hyundai Equus VI 2009-2026 Service ManualHyundai Equus: Air Lumber Support Switch Repair procedures

Second generation VI (2009–2026) / Hyundai Equus VI 2009-2026 Service Manual / Body Electrical System / Seat Electrical / Air Lumber Support Switch Repair procedures

Inspection
1.
Disconnect the negative(-) battery terminal.
2.
Remove the shield outer cover.
(Refer to Body - "Front Seat Shield Outer Cover")

3.
Disconnect the power seat air lumber support switch connector (A).

4.
With the power seat air lumber support switch in each position, make sure that continuity exists between the terminal below.
If continuity is not as specified, replace the switch.

Position &
Switch Name
Inflate Cell
Deflate Cell
1
Upper
Upper & middle
Lower
2
Middle
Upper & middle & lower
-
3
Lower
Middle & lower
Upper
4
Deflate
-
Upper & middle & lower

Air Lumber Support
1.
Disconnect the negative(-) battery terminal.
2.
Remove the seat back cover.
(Refer to Body - "Front Seat Back Cover")
3.
Disconnect the air lumber tripple valve unit connector.

Connector
Pin No.
Pin Name
Remarks
Pump motor
1
Pump motor power +
Unit output pin
2
Pump motor GND -
Unit GND pin
Unit
1
Power (B+)
x
2
IGN2
x
3
-
x
4
Deflate switch
x
5
Upper switch
x
6
Middle switch
x
7
Lower switch
x
8
GND
x

4.
With supplying the voltage to the air pump in each position, check that the air lumber support is operated properly.

A.
Upper air pack
B.
Middle air pack
C.
Lower air pack

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