Pinpoint Test G: The Power Seat Does Not Move Horizontally/Vertically/Recline - Driver
Seats
Pinpoint Tests
Pinpoint Test G: The Power Seat Does Not Move Horizontally/Vertically/Recline - Driver
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 GD126 (BK/WH). When pressed, the seat control switch supplies voltage and ground to the appropriate power seat track or recliner motor to move the seat or backrest.
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 recliner mechanism to pivot the seat backrest forward and rearward.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Seat control switch
- Seat track
- Seat recliner motor
PINPOINT TEST G: THE POWER SEAT DOES NOT MOVE HORIZONTALLY/VERTICALLY/RECLINE - DRIVER
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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G1 CHECK THE HORIZONTAL MOTOR FOR CORRECT OPERATION
- Operate the driver power seat forward and rearward.
- Does the seat move horizontally?
Yes
GO to G2.
No
GO to G3.
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G2 CHECK THE RECLINER MOTOR FOR CORRECT OPERATION
- Recline the driver backrest forward and rearward.
- Does the seat backrest recline forward and rearward?
Yes
GO to G6.
No
GO to G13.
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G3 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 portion of Air Bag Systems.
- Disconnect: Driver Seat Side Air Bag C327.
- Disconnect: Driver Seat Motor C357.
- 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 voltage between driver seat motor C357-6, circuit CPS28 (GN), harness side and C357-3, circuit CPS23 (GN/VT), harness side, while operating the seat control switch horizontal adjust forward and rearward.
- 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 Seat Track. TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327. REPOWER the SRS. REFER to Air Bag Systems.
No
GO to G4.
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G4 CHECK CIRCUIT CPS28 (GN) FOR AN OPEN AND SHORT TO GROUND
- Disconnect: Driver Seat Control Switch C360.
- Measure resistance between:
- driver seat control switch C360-9, circuit CPS28 (GN), harness side and driver seat motor C357-6, circuit CPS28 (GN), harness side.
- driver seat control switch C360-9, circuit CPS28 (GN), harness side and ground.
- Is resistance less than 5 ohms between the driver seat motor and the driver seat control switch; and greater than 10,000 ohms between the driver seat control switch and ground?
Yes
GO to G5.
No
REPAIR the circuit. TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327. REPOWER the SRS. REFER to Air Bag Systems.
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G5 CHECK CIRCUIT CPS23 (GN/VT) FOR AN OPEN AND SHORT TO GROUND
- Measure resistance between:
- driver seat control switch C360-4, circuit CPS23 (GN/VT), harness side and driver seat motor C357-3, circuit CPS23 (GN/VT), harness side.
- driver seat control switch C360-4, circuit CPS23 (GN/VT), harness side and ground.
- Is resistance less than 5 ohms between the driver seat motor and the driver seat control switch; 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 Seat Control Switch. TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT driver 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 driver seat side air bag module C327. REPOWER the SRS. REFER to Air Bag Systems.
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G6 DETERMINE THE SEAT HEIGHT ADJUST FAILURE
- Operate the front and rear seat height adjustments.
- Does the seat front and rear height adjust up and down?
Yes
If only front height adjust operates, GO to G7.
If only rear height adjust operates, GO to G10.
No
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 C327. REPOWER the SRS. REFER to Air Bag Systems.
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G7 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 portion of Air Bag Systems.
- Disconnect: Driver Seat Side Air Bag C327.
- Disconnect: Driver Seat Motor C357.
- 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 voltage between driver seat motor C357-1, circuit CPS27 (BU/BN), harness side and C357-4, circuit CPS26 (YE/BU), harness side, 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 Seat Track. TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327. REPOWER the SRS. REFER to Air Bag Systems.
No
GO to G8.
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G8 CHECK CIRCUIT CPS27 (BU/BN) FOR AN OPEN AND SHORT TO GROUND
- Disconnect: Driver Seat Control Switch C360.
- Measure resistance between:
- driver seat control switch C360-1, circuit CPS27 (BU/BN), harness side and driver seat motor C357-1, circuit CPS27 (BU/BN), harness side.
- driver seat control switch C360-1, circuit CPS27 (BU/BN), harness side and ground.
- Is resistance less than 5 ohms between the driver seat motor and the driver seat control switch; and greater than 10,000 ohms between the driver seat control switch and ground?
Yes
GO to G9.
No
REPAIR the circuit. TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327. REPOWER the SRS. REFER to Air Bag Systems.
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G9 CHECK CIRCUIT CPS26 (YE/BU) FOR AN OPEN AND SHORT TO GROUND
- Measure resistance between:
- driver seat control switch C360-12, circuit CPS26 (YE/BU), harness side and driver seat motor C357-4, circuit CPS26 (YE/BU), harness side.
- driver seat control switch C360-12, circuit CPS26 (YE/BU), harness side and ground.
- Is resistance less than 5 ohms between the driver seat motor and the driver seat control switch; 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 Seat Control Switch. TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT driver 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 driver seat side air bag module C327. REPOWER the SRS. REFER to Air Bag Systems.
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G10 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 portion of Air Bag Systems.
- Disconnect: Driver Seat Side Air Bag C327.
- Disconnect: Driver Seat Motor C357.
- 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 voltage between driver seat motor C357-2, circuit CPS25 (WH/VT), harness side and C357-5, circuit CPS24 (GY), harness side, while operating the seat control switch front 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 Seat Track. TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327. REPOWER the SRS. REFER to Air Bag Systems.
No
GO to G11.
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G11 CHECK CIRCUIT CPS25 (WH/VT) FOR AN OPEN AND SHORT TO GROUND
- Disconnect: Driver Seat Control Switch C360.
- Measure resistance between:
- driver seat control switch C360-2, circuit CPS25 (WH/VT), harness side and driver seat motor C357-2, circuit CPS25 (WH/VT), harness side.
- driver seat control switch C360-2, circuit CPS25 (WH/VT), harness side and ground.
- Is resistance less than 5 ohms between the driver seat motor and the driver seat control switch; and greater than 10,000 ohms between the driver seat control switch and ground?
Yes
GO to G12.
No
REPAIR the circuit. TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327. REPOWER the SRS. REFER to Air Bag Systems.
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G12 CHECK CIRCUIT CPS24 (GY) FOR AN OPEN AND A SHORT TO GROUND
- Measure resistance between:
- driver seat control switch C360-6, circuit CPS24 (GY) harness side, and driver seat motor C357-5, circuit CPS24 (GY), harness side.
- driver seat control switch C360-6, circuit CPS24 (GY), harness side and ground.
- Is resistance less than 5 ohms between the driver seat motor and the driver seat control switch; 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 Seat Control Switch. TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT driver 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 driver seat side air bag module C327. REPOWER the SRS. REFER to Air Bag Systems.
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G13 CHECK VOLTAGE TO THE DRIVER SEAT RECLINER MOTOR
- Ignition OFF.
- Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Air Bag Systems.
- Disconnect: Driver Seat Side Air Bag C327.
- Disconnect: Driver Seat Recliner Motor C3187.
- 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 voltage between driver seat recliner motor C3187-1, circuit CPS29 (WH/BN), harness side and C3187-5, circuit CPS30 (VT/BN), harness side, while operating the seat control switch recline adjust forward and rearward.
- 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 recliner motor. REFER to Seat Recliner Motor Seat Recliner Motor. TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327. REPOWER the SRS. REFER to Air Bag Systems.
No
GO to G14.
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G14 CHECK CIRCUIT CPS29 (WH/BN) FOR AN OPEN AND SHORT TO GROUND
- Disconnect: Driver Seat Control Switch C360.
- Measure resistance between:
- driver seat control switch C360-11, circuit CPS29 (WH/BN), harness side and driver seat recliner motor C3187-1, circuit CPS29 (WH/BN), harness side.
- driver seat control switch C360-11, circuit CPS29 (WH/BN), harness side and ground.
- Is resistance less than 5 ohms between the driver seat recliner motor and the driver seat control switch; and greater than 10,000 ohms between the driver seat control switch and ground?
Yes
GO to G15.
No
REPAIR the circuit. TEST the system for normal operation.
DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327. REPOWER the SRS. REFER to Air Bag Systems.
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G15 CHECK CIRCUIT CPS30 (VT/BN) FOR AN OPEN AND SHORT TO GROUND
- Measure resistance between:
- driver seat control switch C360-8, circuit CPS30 (VT/BN) harness side, and driver seat recliner motor C3187-5, circuit CPS30 (VT/BN), harness side.
- driver seat control switch C360-8, circuit CPS30 (VT/BN), harness side and ground.
- Is resistance less than 5 ohms between the driver seat recliner motor and the driver seat control switch; and greater than 10,000 ohms between the seat control switch and ground?
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 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 driver seat side air bag module C327. REPOWER the SRS. REFER to Air Bag Systems.
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