Pinpoint Test B: The Power Seat Is Inoperative - Driver, Without Power Recline

Seats

Pinpoint Tests

Pinpoint Test B: The Power Seat is Inoperative - Driver, Without Power Recline

Refer to Wiring Diagram Set 120 (Fusion/Milan/MKZ, Fusion Hybrid/Milan Hybrid), Power Seats for schematic and connector information. Diagrams By Number

Normal Operation

The driver seat control switch is supplied battery voltage on circuit SBB32 (VT/RD) and ground on circuit GD126 (BK/WH). The seat control switch then supplies voltage and ground to the appropriate circuits to operate the seat motors.

This pinpoint test is intended to diagnose the following:
- Fuse
- Wiring, terminals or connectors
- Seat control switch



PINPOINT TEST B: THE POWER SEAT IS INOPERATIVE - DRIVER, WITHOUT POWER RECLINE

NOTE: The air bag warning indicator illuminates when the correct Restraints Control Module (RCM) fuse is removed and the ignition switch is ON.

NOTE: The Supplemental Restraint System (SRS) must be fully operational and free of faults before releasing the vehicle to the customer.

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B1 CHECK FOR VOLTAGE TO THE SEAT CONTROL SWITCH


- Ignition OFF.
- Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the
General Procedures portion of Restraint Systems.
- Disconnect: Driver Seat Side Air Bag C327 .
- Disconnect: Driver Seat Control Switch C369 .
- WARNING: Make sure no one is in the vehicle and there is nothing blocking or placed in front of any air bag module when the battery is connected. Failure to follow these instructions may result in serious personal injury in the event of an accidental deployment.
- Connect the battery ground cable. Refer to Battery.
- Measure the voltage between driver seat control switch C369-4, circuit SBB32 (VT/RD), harness side and ground.




- Is the voltage greater than 10 volts?

Yes
GO to B2.

No
VERIFY Battery Junction Box (BJB) fuse 32 (30A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the Wiring Diagrams to identify the possible causes of the circuit short Diagrams By Number. TEST the system for normal operation.

DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327. REPOWER the SRS. REFER to Restraint Systems.

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B2 CHECK FOR GROUND TO THE SEAT CONTROL SWITCH


- Measure the resistance between driver seat control switch C369-2, circuit GD126 (BK/WH), harness side and ground.




- Is the resistance less than 5 ohms?

Yes
INSTALL a new driver seat control switch. REFER to Seat Control Switch Seat Control Switch. TEST the system for normal operation.

DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327. REPOWER the SRS. REFER to Restraint Systems.

No
REPAIR the circuit. TEST the system for normal operation.

DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327. REPOWER the SRS. REFER to Restraint Systems.

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