Pinpoint Test C : The Power Seat Does Not Move Horizontally/Vertically - Driver
Seats
Pinpoint Test C : The Power Seat Does Not Move Horizontally/Vertically - Driver
Refer to Wiring Diagram Set 120, Seating for schematic and connector information [1][2]Diagrams By Number.
Normal Operation
The seat control switch supplies battery voltage and ground to 1 of 3 power seat track motors through horizontal motor circuits CPS23 (GN/VT) and CPS28 (GN), front height motor circuits CPS24 (GY) and CPS25 (WH/VT) or rear height motor circuits CPS26 (YE/BU) and CPS27 (BU/BN) to move the seat in the desired direction.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Seat control switch
- Seat track motor
PINPOINT TEST C : THE POWER SEAT DOES NOT MOVE HORIZONTALLY/VERTICALLY - DRIVER
C1 CHECK THE HORIZONTAL MOTOR FOR CORRECT OPERATION
- Operate the seat control switch forward and rearward.
Does the seat move horizontally?
Yes
If only the front height adjust operates, GO to C2.
If only the rear height adjust operates, GO to C5.
No
GO to C8.
C2 CHECK THE VOLTAGE TO THE REAR HEIGHT MOTOR
- Ignition OFF.
- Depower the SRS (Supplemental Restraint System). Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Restraints and Safety Systems &/or Air Bag Systems.
- Disconnect: Driver Seat Side Air Bag C367.
- Disconnect: Driver Power Seat Motor Assembly C353.
- 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 power seat motor assembly C353-8, circuit CPS26 (YE/BU) and C353-2, circuit CPS27 (BU/BN), harness side, while operating the seat control switch rear height up and down.
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 power seat track. REFER to Seat Track - Power . TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C367. REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
No
GO to C3.
C3 CHECK THE REAR HEIGHT MOTOR CIRCUIT FOR AN OPEN
- Disconnect: Driver Seat Control Switch C360.
- Measure the resistance between driver seat control switch C360-5, circuit CPS26 (YE/BU), harness side and driver power seat motor assembly C353-8, circuit CPS26 (YE/BU), harness side.
Is the resistance less than 5 ohms?
Yes
GO to C4.
No
REPAIR the circuit. TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C367. REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
C4 CHECK THE REAR HEIGHT MOTOR CIRCUIT FOR AN OPEN
- Measure the resistance between driver seat control switch C360-7, circuit CPS27 (BU/BN), harness side and driver power seat motor assembly C353-2, circuit CPS27 (BU/BN), harness side.
Is the resistance less than 5 ohms?
Yes
INSTALL a new driver seat control switch. REFER to Seat Control Switch . TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C367. 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 driver seat side air bag module C367. REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
C5 CHECK FOR VOLTAGE TO THE FRONT HEIGHT MOTOR
- Ignition OFF.
- Depower the SRS (Supplemental Restraint System). Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Restraints and Safety Systems &/or Air Bag Systems.
- Disconnect: Driver Seat Side Air Bag C367.
- Disconnect: Driver Power Seat Motor Assembly C353.
- 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 power seat motor assembly C353-1, circuit CPS24 (GY) and C353-7, circuit CPS25 (WH/VT), harness side while operating the driver seat control switch front height up and down.
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 power seat track. REFER to Seat Track - Power . TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C367. REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
No
GO to C6.
C6 CHECK THE FRONT HEIGHT MOTOR CIRCUIT FOR AN OPEN
- Disconnect: Driver Seat Control Switch C360.
- Measure the resistance between driver seat control switch C360-1, circuit CPS24 (GY), harness side and driver power seat motor assembly C353-1, circuit CPS24 (GY), harness side.
Is the resistance less than 5 ohms?
Yes
GO to C7.
No
REPAIR the circuit. TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C367. REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
C7 CHECK THE FRONT HEIGHT MOTOR CIRCUIT FOR AN OPEN
- Measure the resistance between driver seat control switch C360-8, circuit CPS25 (WH/VT), harness side and driver power seat motor assembly C353-7, circuit CPS25 (WH/VT), harness side.
Is the resistance less than 5 ohms?
Yes
INSTALL a new driver seat control switch. REFER to Seat Control Switch . TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C367. 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 driver seat side air bag module C367. REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
C8 CHECK FOR VOLTAGE TO THE HORIZONTAL MOTOR
- Ignition OFF.
- Depower the SRS (Supplemental Restraint System). Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Restraints and Safety Systems &/or Air Bag Systems.
- Disconnect: Driver Seat Side Air Bag C367.
- Disconnect: Driver Power Seat Motor Assembly C353.
- 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 power seat motor assembly C353-3, circuit CPS23 (GN/VT) and C353-5, circuit CPS28 (GN), harness side while operating the 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 power seat track. REFER to Seat Track - Power . TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C367. REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
No
GO to C9.
C9 CHECK THE HORIZONTAL MOTOR CIRCUIT FOR AN OPEN
- Disconnect: Driver Seat Control Switch C360.
- Measure the resistance between driver seat control switch C360-6, circuit CPS23 (GN/VT), harness side and driver power seat motor assembly C353-3, circuit CPS23 (GN/VT), harness side.
Is the resistance less than 5 ohms?
Yes
GO to C10.
No
REPAIR the circuit. TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C367. REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
C10 CHECK THE HORIZONTAL MOTOR CIRCUIT FOR AN OPEN
- Measure the resistance between driver seat control switch C360-3, circuit CPS28 (GN), harness side and driver power seat motor assembly C353-5, circuit CPS28 (GN), harness side.
Is the resistance less than 5 ohms?
Yes
INSTALL a new driver seat control switch. REFER to Seat Control Switch . TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C367. 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 driver seat side air bag module C367. REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.