Pinpoint Test A: The Power Seat Is Inoperative - Driver Seat With Power Recliner
Seats
Pinpoint Tests
Pinpoint Test A: The Power Seat is Inoperative - Driver Seat With Power Recliner
Refer to Wiring Diagram Set 120, Power Seats for schematic and connector information. Diagrams By Number
Normal Operation
The driver seat control switch is supplied battery voltage on circuit SBB14 (BN/RD) and ground on circuit GD133 (BK). When pressed, the seat control switch supplies that voltage and ground to a power seat track motor or power recline motor to move the seat or backrest to the desired position. 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). There is an additional motor in the power recline 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 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 A: THE POWER SEAT IS INOPERATIVE - DRIVER SEAT WITH POWER RECLINER
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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A1 CHECK CIRCUIT SBB14 (BN/RD) FOR VOLTAGE
- 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 Safety Belt Buckle Pretensioner C3201.
- Disconnect: Driver Seat Side Air Bag C3049.
- Disconnect: Driver Seat Control Switch C352.
- 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 C352-5, circuit SBB14 (BN/RD), harness side and ground.
- Is the voltage greater than 10 volts?
Yes
GO to A2.
No
VERIFY Battery Junction Box (BJB) fuse 14 (40A) 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. Diagrams By Number
DISCONNECT the battery ground cable.
CONNECT driver safety belt buckle and pretensioner C3201.
CONNECT driver seat side air bag module C3049.
REPOWER the SRS. REFER to Restraint Systems.
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A2 CHECK CIRCUIT GD133 (BK) FOR AN OPEN
- Measure the resistance between driver seat control switch C352-3, circuit GD133 (BK), 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 safety belt buckle and pretensioner C3201.
CONNECT driver seat side air bag module C3049.
REPOWER the SRS. REFER to Restraint Systems.
No
REPAIR the circuit. TEST the system for normal operation.
DISCONNECT the battery ground cable.
CONNECT driver safety belt buckle and pretensioner C3201.
CONNECT driver seat side air bag module C3049.
REPOWER the SRS. REFER to Restraint Systems.
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