Pinpoint Test C: The Power Seat Is Inoperative - Passenger, Without Power Recline
Seats
Pinpoint Tests
Pinpoint Test C: The Power Seat is Inoperative - Passenger, Without Power Recline
Refer to Wiring Diagram Set 120, Power Seats for schematic and connector information. Diagrams By Number
Normal Operation
The passenger seat control switch is powered by battery voltage on circuit SBB61 (GY/RD) and is supplied ground on circuit GD145 (BK/BU). When pressed, the seat control switch supplies that voltage and ground to a power seat track motor to move the seat. When pressed in the opposite direction, the seat control switch reverses the polarity to that same power seat track motor, which moves the seat in the opposite direction. There are 3 power seat track motors that combine to move the seat cushion horizontally (forward/rearward) and vertically (front up/down and rear up/down). If a new seat track motor needs to be installed, it is necessary to install an entire power seat track. The power recline motor is serviced separately.
This pinpoint test is intended to diagnose the following:
- Fuse
- Wiring, terminals or connectors
- Seat control switch
PINPOINT TEST C: THE POWER SEAT IS INOPERATIVE - PASSENGER, WITHOUT POWER RECLINE
NOTE: The air bag warning indicator illuminates when the correct Restraints Control Module (RCM) fuse is removed and the ignition 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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C1 CHECK CIRCUIT SBB61 (GY/RD) FOR VOLTAGE
- Ignition OFF.
- Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Air Bag Systems.
- Disconnect: Passenger Seat Side Air Bag C327.
- Disconnect: Passenger Seat Control Switch C355.
- 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 C355-4, circuit SBB61 (GY/RD), harness side and ground.
- Is the voltage greater than 10 volts?
Yes
GO to C2.
No
VERIFY Battery Junction Box (BJB) fuse 61 (30A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the Wiring Diagrams to identify possible causes of the circuit short. TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C327.
REPOWER the SRS. REFER to Air Bag Systems.
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C2 CHECK CIRCUIT GD145 (BK/BU) FOR AN OPEN
- Measure the resistance between passenger seat control switch C355-2, circuit GD145 (BK/BU), harness side and ground.
- Is the resistance less than 5 ohms?
Yes
INSTALL a new seat control switch. REFER to Seat Control Switch - Front Seat Control Switch - Front. TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT passenger seat side air bag module C327.
REPOWER the SRS. REFER to 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 C327.
REPOWER the SRS. REFER to Air Bag Systems.
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