Pinpoint Test B: The Power Seat is Inoperative - Passenger

Seats

Pinpoint Test B: The Power Seat is Inoperative - Passenger

Normal Operation

When the passenger seat control switch is activated, voltage and ground is supplied to the applicable seat track motor or seat recliner motor to move the seat to the desired position. There are 3 seat track motors that combine to move the seat cushion horizontally (forward/rearward) and vertically (front up/down and rear up/down). There is an additional motor in the seat recliner mechanism to move the seat backrest forward and rearward. If a new seat track motor needs to be installed, it is necessary to install an entire seat track assembly.

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 - PASSENGER

NOTE:
If a seat equipped with a seat mounted side air bag is being repaired, the Supplemental Restraint System (SRS) must be depowered. Refer to Restraints and Safety Systems &/or Air Bag Systems.
NOTE:
The air bag warning lamp illuminates when the Restraints Control Module (RCM) fuse is removed and the ignition switch is ON. This is normal operation and does not indicate an SRS (Supplemental Restraint System) fault.
NOTE:
The SRS (Supplemental Restraint System) must be fully operational and free of faults before releasing the vehicle to the customer.

B1 CHECK THE PASSENGER SEAT CONTROL SWITCH FOR VOLTAGE

- Ignition OFF.

- Depower the SRS (Supplemental Restraint System). Refer to Restraints and Safety Systems &/or Air Bag Systems.

- Disconnect: Passenger Seat Side Air Bag Module C339.

- Disconnect: Passenger Seat Control Switch C330.

- 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.

- Measure the voltage between passenger seat control switch C330-5, circuit CBX05 (VT/RD), harness side and ground.






Is the voltage greater than 10 volts?

Yes
GO to B2.
No
VERIFY Battery Junction Box (BJB) fuse 14 (30A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the Wiring Diagrams to identify possible causes of the circuit short [1][2]Diagrams By Number. TEST the system for normal operation.

DISCONNECT the battery ground cable.

CONNECT passenger seat side air bag module C339.

REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.

B2 CHECK THE PASSENGER SEAT CONTROL SWITCH GROUND CIRCUIT FOR AN OPEN

- Measure the resistance between passenger seat control switch C330-3, circuit GD903 (BK/WH), harness side and ground.






Is the resistance less than 5 ohms?

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

DISCONNECT the battery ground cable.

CONNECT passenger seat side air bag module C339.

REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
No
REPAIR the circuit. TEST the system for normal operation.

DISCONNECT the battery ground cable.

CONNECT passenger seat side air bag module C339.

REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.