Pinpoint Test D: The Power Seat Does Not Move Horizontally/Vertically/Recline - Driver, With Power Recliner
Seats
Pinpoint Tests
Pinpoint Test D: The Power Seat Does Not Move Horizontally/Vertically/Recline - Driver, With 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 powered by battery voltage on driver circuit CBX05 (VT/RD) and is supplied ground on circuit GD904 (BK/BU). When pressed, the seat control switch supplies that voltage and ground to a power seat track motor or power recliner motor to move the seat or backrest. When pressed in the opposite direction, the seat control switch reverses the polarity to that same power seat track motor or power recliner motor, which moves the seat or backrest in the opposite direction. 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 power recliner mechanism to move the seat backrest forward and rearward. If a new motor needs to be installed, it is necessary to install an entire power seat track or power recliner mechanism.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Seat control switch
- Power seat motor (seat track)
- Power recliner mechanism
PINPOINT TEST D: THE POWER SEAT DOES NOT MOVE HORIZONTALLY/VERTICALLY/RECLINE - DRIVER, WITH 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.
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D1 CHECK HORIZONTAL MOTOR FOR CORRECT OPERATION
- Operate the driver power seat forward and rearward.
- Will the seat move horizontally?
Yes
GO to D2.
No
GO to D3.
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D2 CHECK RECLINER MOTOR FOR CORRECT OPERATION
- Recline the driver backrest forward and rearward.
- Will the seat backrest recline forward and rearward?
Yes
GO to D6.
No
GO to D13.
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D3 CHECK THE 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 C3138.
- 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 operated 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 C3138.
CONNECT driver seat safety belt buckle pretensioner C3065.
REPOWER the SRS. REFER to Air Bag Systems.
No
GO to D4.
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D4 CHECK HORIZONTAL MOTOR CIRCUIT CPS23 (GN/VT) FOR AN OPEN AND SHORT TO GROUND
- Disconnect: Driver Seat Control Switch C369.
- Measure the resistance between:
- driver seat control switch C369-4, circuit CPS23 (GN/VT), harness side and driver seat horizontal motor C362-1, circuit CPS23 (GN/VT), harness side.
- driver seat control switch C369-4, circuit CPS23 (GN/VT), harness side and ground.
- Is the resistance less than 5 ohms between the driver seat horizontal motor and the driver seat control switch, and greater than 10,000 ohms between the driver seat control switch and ground?
Yes
GO to D5.
No
REPAIR the circuit. TEST the system for normal operation.
DISCONNECT the battery ground cable.
CONNECT driver seat side air bag C3138.
CONNECT driver seat safety belt buckle pretensioner C3065.
REPOWER the SRS. REFER to Air Bag Systems.
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D5 CHECK HORIZONTAL MOTOR CIRCUIT CPS28 (GN) FOR AN OPEN AND SHORT TO GROUND
- Measure the resistance between:
- driver seat control switch C369-9, circuit CPS28 (GN), harness side and driver seat horizontal motor C362-2, circuit CPS28 (GN), harness side.
- driver seat control switch C369-9, circuit CPS28 (GN), harness side and ground.
- Is the resistance less than 5 ohms between the driver seat horizontal 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 - Front Seat Control Switch - Front. TEST the system for normal operation.
DISCONNECT the battery ground cable.
CONNECT driver seat side air bag C3138.
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 C3138.
CONNECT driver seat safety belt buckle pretensioner C3065.
REPOWER the SRS. REFER to Air Bag Systems.
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D6 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 adjustment operates, GO to D7.
If only rear height adjustment operates, GO to D10.
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 C3138.
CONNECT driver seat safety belt buckle pretensioner C3065.
REPOWER the SRS. REFER to Air Bag Systems.
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D7 CHECK THE 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 C3138.
- 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 C363-5, circuit CPS26 (YE/BU), harness side and C363-1, circuit CPS27 (BU/BN), harness side, while operating the seat control switch rear height adjust up and down.
- Is the voltage greater than 10 volts when the seat control switch is operated 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 C3138.
CONNECT driver seat safety belt buckle pretensioner C3065.
REPOWER the SRS. REFER to Air Bag Systems.
No
GO to D8.
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D8 CHECK REAR SEAT HEIGHT MOTOR CIRCUIT CPS27 (BU/BN) FOR AN OPEN AND SHORT TO GROUND
- Disconnect: Driver Seat Control Switch C369.
- Measure the resistance between:
- driver seat control switch C369-1, circuit CPS27 (BU/BN), harness side and driver seat rear height motor C363-1, circuit CPS27 (BU/BN), harness side.
- driver seat control switch C369-1, circuit CPS27 (BU/BN), harness side and ground.
- Is the resistance less than 5 ohms between the driver seat rear height motor and the driver seat control switch, and greater than 10,000 ohms between the driver seat control switch and ground?
Yes
GO to D9.
No
REPAIR the circuit. TEST the system for normal operation.
DISCONNECT the battery ground cable.
CONNECT driver seat side air bag C3138.
CONNECT driver seat safety belt buckle pretensioner C3065.
REPOWER the SRS. REFER to Air Bag Systems.
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D9 CHECK REAR SEAT HEIGHT MOTOR CIRCUIT CPS26 (YE/BU) FOR AN OPEN AND SHORT TO GROUND
- Measure the resistance between:
- driver seat control switch C369-12, circuit CPS26 (YE/BU), harness side and driver seat rear height motor C363-5, circuit CPS26 (YE/BU), harness side.
- driver seat control switch C369-12, circuit CPS26 (YE/BU), harness side and ground.
- Is the resistance less than 5 ohms between the driver seat rear height 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 - Front Seat Control Switch - Front. TEST the system for normal operation.
DISCONNECT the battery ground cable.
CONNECT driver seat side air bag C3138.
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 C3138.
CONNECT driver seat safety belt buckle pretensioner C3065.
REPOWER the SRS. REFER to Air Bag Systems.
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D10 CHECK THE 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 C3138.
- 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 pushing the seat control switch front height adjust up and down.
- Is the voltage greater than 10 volts when the seat control switch is operated 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 C3138.
CONNECT driver seat safety belt buckle pretensioner C3065.
REPOWER the SRS. REFER to Air Bag Systems.
No
GO to D11.
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D11 CHECK DRIVER SEAT FRONT HEIGHT MOTOR CIRCUIT CPS25 (WH/VT) FOR AN OPEN AND SHORT TO GROUND
- Disconnect: Driver Seat Control Switch C369.
- Measure the resistance between:
- driver seat control switch C369-2, circuit CPS25 (WH/VT), harness side and driver seat front height motor C382-2, circuit CPS25 (WH/VT), harness side.
- driver seat control switch C369-2, circuit CPS25 (WH/VT), harness side and ground.
- Is the resistance less than 5 ohms between the driver seat front height motor and the driver seat control switch, and greater than 10,000 ohms between the driver seat control switch and ground?
Yes
GO to D12.
No
REPAIR the circuit. TEST the system for normal operation.
DISCONNECT the battery ground cable.
CONNECT driver seat side air bag C3138.
CONNECT driver seat safety belt buckle pretensioner C3065.
REPOWER the SRS. REFER to Air Bag Systems.
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D12 CHECK DRIVER SEAT FRONT HEIGHT MOTOR CIRCUIT CPS24 (GY) FOR AN OPEN AND A SHORT TO GROUND
- Measure the resistance between:
- driver seat control switch C369-6, circuit CPS24 (GY) harness side, and driver seat front height motor C382-1, circuit CPS24 (GY), harness side.
- driver seat control switch C369-6, circuit CPS24 (GY), harness side and ground.
- Is the resistance less than 5 ohms between the driver seat front height 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 - Front Seat Control Switch - Front. TEST the system for normal operation.
DISCONNECT the battery ground cable.
CONNECT driver seat side air bag C3138.
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 C3138.
CONNECT driver seat safety belt buckle pretensioner C3065.
REPOWER the SRS. REFER to Air Bag Systems.
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D13 CHECK THE 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 of Air Bag Systems.
- Disconnect: Driver Seat Side Air Bag C3138.
- Disconnect: Driver Safety Belt Buckle Pretensioner C3065.
- 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.
- Measure the voltage between driver seat recliner motor C3187-3, circuit CPS08 (VT/OG), harness side and C3187-1, circuit CPS07 (GY/BN), while pushing the recline switch forward and rearward.
- Is the voltage greater than 10 volts when the seat control switch is operated in both directions and 0 volt in the rest position?
Yes
INSTALL a new driver seat recliner motor. REFER to Seat Recliner Motor - Front Seat Recliner Motor - Front. TEST the system for normal operation.
DISCONNECT the battery ground cable.
CONNECT driver seat side air bag C3138.
CONNECT driver seat safety belt buckle pretensioner C3065.
REPOWER the SRS. REFER to Air Bag Systems.
No
GO to D14.
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D14 CHECK DRIVER SEAT RECLINER MOTOR CIRCUIT FOR AN OPEN AND SHORT TO GROUND
- Disconnect: Driver Seat Control Switch C369.
- Measure the resistance between:
- driver seat control switch C369-8, circuit CPS30 (VT/BN), harness side and driver seat recliner motor C3187-3, circuit CPS08 (VT/OG), harness side.
- driver seat control switch C369-8, circuit CPS30 (VT/BN), harness side and ground.
- Is the 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 D15.
No
REPAIR the circuit. TEST the system for normal operation.
DISCONNECT the battery ground cable.
CONNECT driver seat side air bag C3138.
CONNECT driver seat safety belt buckle pretensioner C3065.
REPOWER the SRS. REFER to Air Bag Systems.
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D15 CHECK DRIVER SEAT RECLINER MOTOR CIRCUIT FOR AN OPEN AND A SHORT TO GROUND
- Measure the resistance between:
- driver seat control switch C369-11, circuit CPS29 (WH/BN) harness side, and driver seat recliner motor C3187-1, circuit CPS07 (GY/BN), harness side;
- driver seat control switch C369-11, circuit CPS29 (WH/BN), harness side and ground.
- Is the 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 - Front Seat Control Switch - Front. TEST the system for normal operation.
DISCONNECT the battery ground cable.
CONNECT driver seat side air bag C3138.
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 C3138.
CONNECT driver seat safety belt buckle pretensioner C3065.
REPOWER the SRS. REFER to Air Bag Systems.
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