Pinpoint Test H: The Power Seat Does Not Move Horizontally/Vertically - Driver
Seats
Pinpoint Tests
Pinpoint Test H: The Power Seat Does Not Move Horizontally/Vertically - 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 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).
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Seat control switch
- Seat track
PINPOINT TEST H: THE POWER SEAT DOES NOT MOVE HORIZONTALLY/VERTICALLY - 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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H1 CHECK THE HORIZONTAL MOTOR FOR CORRECT OPERATION
- Operate the driver power seat forward and rearward.
- Does the seat move horizontally?
Yes
GO to H5.
No
GO to H2.
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H2 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 CPS23 (GN/VT), harness side and C357-3, circuit CPS22 (BN), 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 H3.
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H3 CHECK CIRCUIT CPS22 (BN) FOR AN OPEN AND SHORT TO GROUND
- Disconnect: Driver Seat Control Switch C369.
- Measure resistance between:
- driver seat control switch C369-6, circuit CPS22 (BN), harness side and driver seat motor C357-3, circuit CPS22 (BN), harness side.
- driver seat control switch C369-6, circuit CPS22 (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 H4.
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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H4 CHECK CIRCUIT CPS23 (GN/VT) FOR AN OPEN AND SHORT TO GROUND
- Measure resistance between:
- driver seat control switch C369-3, circuit CPS23 (GN/VT), harness side and driver seat motor C357-6, circuit CPS23 (GN/VT), harness side.
- driver seat control switch C369-3, 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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H5 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 H6.
If only rear height adjust operates, GO to H9.
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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H6 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 H7.
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H7 CHECK CIRCUIT CPS27 (BU/BN) FOR AN OPEN AND SHORT TO GROUND
- Disconnect: Driver Seat Control Switch C369.
- Measure resistance between:
- driver seat control switch C369-8, circuit CPS27 (BU/BN), harness side and driver seat motor C357-1, circuit CPS27 (BU/BN), harness side.
- driver seat control switch C369-8, 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 H8.
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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H8 CHECK CIRCUIT CPS26 (YE/BU) FOR AN OPEN AND SHORT TO GROUND
- Measure resistance between:
- driver seat control switch C369-1, circuit CPS26 (YE/BU), harness side and driver seat motor C357-4, circuit CPS26 (YE/BU), harness side.
- driver seat control switch C369-1, 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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H9 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 H10.
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H10 CHECK CIRCUIT CPS25 (WH/VT) FOR AN OPEN AND SHORT TO GROUND
- Disconnect: Driver Seat Control Switch C369.
- Measure resistance between:
- driver seat control switch C369-7, circuit CPS25 (WH/VT), harness side and driver seat motor C357-2, circuit CPS25 (WH/VT), harness side.
- driver seat control switch C369-7, 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 H11.
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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H11 CHECK CIRCUIT CPS24 (GY) FOR AN OPEN AND SHORT TO GROUND
- Measure resistance between:
- driver seat control switch C369-5, circuit CPS24 (GY) harness side and driver seat motor C357-5, circuit CPS24 (GY), harness side.
- driver seat control switch C3069-5, 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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