Pinpoint Test A: The Power Seat Is Inoperative - Driver, With Manual Recliner
Seats
Pinpoint Tests
Pinpoint Test A: The Power Seat is Inoperative - Driver, With Manual 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 voltage on circuit CBX05 (VT/RD) and ground on circuit GD904 (BK/BU). When pressed, the seat control switch supplies voltage and ground to a seat track 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). If a new motor on the seat track 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 A: THE POWER SEAT IS INOPERATIVE - DRIVER, WITH MANUAL RECLINER
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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A1 CHECK THE DRIVER SEAT CONTROL SWITCH 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 Side Air Bag Module C3051.
- Disconnect: Driver Seat Control Switch C360.
- 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 C360-4, circuit CBX05 (VT/RD), harness side and ground.
- Is the voltage greater than 10 volts?
Yes
GO to A2.
No
VERIFY Battery Junction Box (BJB) fuse 74 (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. Diagrams By Number
DISCONNECT the battery ground cable.
CONNECT driver seat side air bag module C3051.
REPOWER the SRS. REFER to Restraint Systems.
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A2 CHECK THE DRIVER SEAT CONTROL SWITCH GROUND CIRCUIT FOR AN OPEN
- Measure the resistance between driver seat control switch C360-2, circuit GD904 (BK/BU), 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 C3051.
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 C3051.
REPOWER the SRS. REFER to Restraint Systems.
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