Pinpoint Test F: The Power Seat Does Not Move Horizontally/Vertically - Driver, Without Power Recliner
Seats
Pinpoint Tests
Pinpoint Test F: The Power Seat Does Not Move Horizontally/Vertically - Driver, Without 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 SBB32 (VT/RD) and ground on circuit GD147 (BK/VT). When pressed, the seat control switch supplies that voltage and ground to a power seat track motor to move the seat. 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 motor needs to be installed, it is necessary to install an entire power seat track.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Seat control switch
- Power seat motor (seat track)
PINPOINT TEST F: THE POWER SEAT DOES NOT MOVE HORIZONTALLY/VERTICALLY - DRIVER, WITHOUT 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.
NOTE: The memory seat track motor electrical connectors will connect to a seat track without the memory option. When installing a new seat track, make sure the correct memory or non-memory seat track is being installed.
-------------------------------------------------
F1 CHECK THE HORIZONTAL MOTOR FOR CORRECT OPERATION
- Operate the driver power seat forward and rearward.
- Will the seat move horizontally?
Yes
GO to F5.
No
GO to F2.
-------------------------------------------------
F2 CHECK VOLTAGE TO THE DRIVER SEAT HORIZONTAL MOTOR
- Ignition OFF.
- Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures of Air Bag Systems.
- Disconnect: Driver Seat Side Air Bag C3226.
- Disconnect: Driver Safety Belt Buckle Pretensioner C3065.
- Disconnect: Driver Seat Horizontal Motor C362.
- 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 driver seat horizontal motor C362-1, circuit CPS23 (GN/VT), harness side and C362-2, circuit CPS28 (GN), harness side, while pushing the driver seat control switch forward and rearward.
- Is the voltage greater than 10 volts when the seat control switch is toggled in both directions and 0 volt in the rest position?
Yes
INSTALL a new driver seat track assembly. REFER to Seat Track - Front Seat Track - Front. TEST the system for normal operation.
DISCONNECT the battery ground cable.
CONNECT driver seat side air bag C3226.
CONNECT driver seat safety belt buckle pretensioner C3065.
REPOWER the SRS. REFER to Air Bag Systems.
No
GO to F3.
-------------------------------------------------
F3 CHECK THE HORIZONTAL MOTOR CIRCUIT FOR AN OPEN AND A SHORT TO GROUND
- Disconnect: Driver Seat Control Switch C360.
- Measure the resistance between:
- driver seat control switch C360-3, circuit CPS23 (GN/VT), harness side and driver seat horizontal motor C362-1, circuit CPS23 (GN/VT), harness side.
- driver seat control switch C360-3, circuit CPS23 (GN/VT), harness side and ground.
- Is the resistance less than 5 ohms between C360-3 and 362-1 and greater than 10,000 ohms between 360-3 and ground?
Yes
GO to F4.
No
REPAIR the circuit. TEST the system for normal operation.
DISCONNECT the battery ground cable.
CONNECT driver seat side air bag C3226.
CONNECT driver seat safety belt buckle pretensioner C3065.
REPOWER the SRS. REFER to Air Bag Systems.
-------------------------------------------------
F4 CHECK THE HORIZONTAL MOTOR CIRCUIT FOR AN OPEN AND A SHORT TO GROUND
- Measure the resistance between:
- driver seat control switch C360-6, circuit CPS28 (GN), harness side and driver seat horizontal motor C362-2, circuit CPS28 (GN), harness side.
- driver seat control switch C360-6, circuit CPS28 (GN), harness side and ground.
- Is the resistance less than 5 ohms between C360-6 and C362-2 and greater than 10,000 ohms between the driver seat control switch and ground?
Yes
INSTALL a new driver 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 driver seat side air bag C3226.
CONNECT driver seat safety belt buckle pretensioner C3065.
REPOWER the SRS. REFER to Air Bag Systems.
No
REPAIR the circuit. TEST the system for normal operation.
DISCONNECT the battery ground cable.
CONNECT driver seat side air bag C3226.
CONNECT driver seat safety belt buckle pretensioner C3065.
REPOWER the SRS. REFER to Air Bag Systems.
-------------------------------------------------
F5 DETERMINE THE SEAT HEIGHT ADJUST FAILURE
- Adjust both front and rear seat height up and down to determine the failure.
- Does the seat front or rear height adjust up and down?
Yes
If only front height adjust operates, GO to F6.
If only rear height adjust operates, GO to F9.
No
INSTALL a new driver 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 driver seat side air bag C3226.
CONNECT driver seat safety belt buckle pretensioner C3065.
REPOWER the SRS. REFER to Air Bag Systems.
-------------------------------------------------
F6 CHECK VOLTAGE TO THE DRIVER SEAT REAR HEIGHT MOTOR
- Ignition OFF.
- Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures of Air Bag Systems.
- Disconnect: Driver Seat Side Air Bag C3226.
- Disconnect: Driver Safety Belt Buckle Pretensioner C3065.
- Disconnect: Driver Seat Rear Height Motor C363.
- 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 driver seat rear height motor C363-1, circuit CPS26 (YE/BU), harness side and C363-2, circuit CPS27 (BU/BN), harness side, while operating the seat control switch rear height adjust up and down.
- Is voltage greater than +10 volts when the rear height adjust is pressed down, greater than -10 volts when the rear height adjust is pressed up and 0 volt when the switch is in the rest position?
Yes
INSTALL a new driver seat track assembly. REFER to Seat Track - Front Seat Track - Front. TEST the system for normal operation.
DISCONNECT the battery ground cable.
CONNECT driver seat side air bag C3226.
CONNECT driver seat safety belt buckle pretensioner C3065.
REPOWER the SRS. REFER to Air Bag Systems.
No
GO to F7.
-------------------------------------------------
F7 CHECK THE REAR HEIGHT MOTOR CIRCUIT FOR AN OPEN AND A SHORT TO GROUND
- Disconnect: Driver Seat Control Switch C360.
- Measure the resistance between:
- driver seat control switch C360-5, circuit CPS27 (BU/BN), harness side and driver seat rear height motor C363-2, circuit CPS27 (BU/BN), harness side.
- driver seat control switch C360-5, circuit CPS27 (BU/BN), harness side and ground.
- Is the resistance less than 5 ohms between C360-5 and C363-2 and greater than 10,000 ohms between C360-5 and ground?
Yes
GO to F8.
No
REPAIR the circuit. TEST the system for normal operation.
DISCONNECT the battery ground cable.
CONNECT driver seat side air bag C3226.
CONNECT driver seat safety belt buckle pretensioner C3065.
REPOWER the SRS. REFER to Air Bag Systems.
-------------------------------------------------
F8 CHECK THE REAR HEIGHT MOTOR CIRCUIT FOR AN OPEN AND A SHORT TO GROUND
- Measure the resistance between:
- driver seat control switch C360-7, circuit CPS26 (YE/BU), harness side and driver seat rear height motor C363-1, circuit CPS26 (YE/BU), harness side;
- driver seat control switch C360-7, circuit CPS26 (YE/BU), harness side and ground.
- Is resistance less than 5 ohms between C360-7 and C363-1 and greater than 10,000 ohms between C360-7 and ground?
Yes
INSTALL a new driver 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 driver seat side air bag C3226.
CONNECT driver seat safety belt buckle pretensioner C3065.
REPOWER the SRS. REFER to Air Bag Systems.
No
REPAIR the circuit. TEST the system for normal operation.
DISCONNECT the battery ground cable.
CONNECT driver seat side air bag C3226.
CONNECT driver seat safety belt buckle pretensioner C3065.
REPOWER the SRS. REFER to Air Bag Systems.
-------------------------------------------------
F9 CHECK VOLTAGE TO THE DRIVER SEAT FRONT HEIGHT MOTOR
- Ignition OFF.
- Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures of Air Bag Systems.
- Disconnect: Driver Seat Side Air Bag C3226.
- Disconnect: Driver Safety Belt Buckle Pretensioner C3065.
- Disconnect: Driver Seat Front Height Motor C382.
- 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 driver seat front height motor C382-1, circuit CPS24 (GY), harness side and C382-2, circuit CPS25 (WH/VT), while operating the seat control switch rear height adjust up and down.
- Is voltage greater than 10 volts when the seat control switch is toggled in both directions and 0 volt in the rest position?
Yes
INSTALL a new driver seat track assembly. REFER to Seat Track - Front Seat Track - Front. TEST the system for normal operation.
DISCONNECT the battery ground cable.
CONNECT driver seat side air bag C3226.
CONNECT driver seat safety belt buckle pretensioner C3065.
REPOWER the SRS. REFER to Air Bag Systems.
No
GO to F10.
-------------------------------------------------
F10 CHECK THE FRONT HEIGHT MOTOR CIRCUIT FOR AN OPEN AND A SHORT TO GROUND
- Disconnect: Driver Seat Control Switch C360.
- Measure the resistance between:
- driver seat control switch C360-1, circuit CPS25 (WH/VT), harness side and driver seat front height motor C382-2, circuit CPS25 (WH/VT), harness side.
- driver seat control switch C360-1, circuit CPS25 (WH/VT), harness side and ground.
- Is resistance less than 5 ohms between the C360-1 and C382-2 and greater than 10,000 ohms between C360-1 and ground?
Yes
GO to F11.
No
REPAIR the circuit. TEST the system for normal operation.
DISCONNECT the battery ground cable.
CONNECT driver seat side air bag C3226.
CONNECT driver seat safety belt buckle pretensioner C3065.
REPOWER the SRS. REFER to Air Bag Systems.
-------------------------------------------------
F11 CHECK THE FRONT HEIGHT MOTOR CIRCUIT FOR AN OPEN AND A SHORT TO GROUND
- Measure the resistance between:
- driver seat control switch C360-8, circuit CPS24 (GY) harness side, and driver seat front height motor C382-1, circuit CPS24 (GY), harness side.
- driver seat control switch C360-8, circuit CPS24 (GY), harness side and ground.
- Is the resistance less than 5 ohms between C360-8 and 382-1 and greater than 10,000 ohms between C360-8 and ground?
Yes
INSTALL a new driver 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 driver seat side air bag C3226.
CONNECT driver seat safety belt buckle pretensioner C3065.
REPOWER the SRS. REFER to Air Bag Systems.
No
REPAIR the circuit. TEST the system for normal operation.
DISCONNECT the battery ground cable.
CONNECT driver seat side air bag C3226.
CONNECT driver seat safety belt buckle pretensioner C3065.
REPOWER the SRS. REFER to Air Bag Systems.
-------------------------------------------------