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Part 2




Seats

Pinpoint Tests

Pinpoint Test A: The Power Seat Is Inoperative/Does Not Operate Correctly - Driver

Refer to Wiring Diagram Set 123, Memory Seats for schematic and connector information. Diagrams By Number

Normal Operation

The seat control switch supplies voltage and ground to the applicable Driver Seat Module (DSM) inputs. The DSM then supplies voltage and ground the appropriate seat track motor or seat recliner motor to move the seat in the desired direction. There are 3 seat track motors that combine to move the seat horizontally (forward/rearward) and vertically (front up/down and rear up/down). The seat recliner mechanism uses a single motor to pivot the seat backrest forward and rearward.

The following pinpoint test diagnoses a memory seat that does not operate in one or more directions when using the seat control switch. If the memory seat moves in all directions using the seat control switch, but does not operate using the memory SET switch, GO to Pinpoint Test D. Pinpoint Test D: The Memory Seat Does Not Operate Correctly - Motor(s) Operate In One Second Intervals Or Memory Seat Recall No





This pinpoint test is intended to diagnose the following:
- Fuse
- Wiring, terminals or connectors
- Seat control switch
- Missing status information (Controller Area Network (CAN) communication bus messages):
- ignition key status
- gear selector position

- Seat track motor (seat track)
- Seat recliner motor
- DSM



PINPOINT TEST A: THE POWER SEAT IS INOPERATIVE/DOES NOT OPERATE CORRECTLY - DRIVER

NOTE: The air bag warning indicator illuminates when the correct Restraints Control Module (RCM) fuse is removed and the ignition is ON.

NOTE: The Supplemental Restraint System (SRS) must be fully operational and free of faults before releasing the vehicle to the customer.

NOTE: Verify good battery condition before diagnosing the memory seat system. Poor battery condition may interfere with memory seat operation, even if vehicle starting is possible.

NOTE: Refer to Description and Operation, Intelligent Access with Push Button Start in Antitheft and Alarm Systems to review the procedures for achieving the various ignition states (ignition OFF, ignition in ACCESSORY, ignition ON, ignition START) on vehicles with this feature.

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A17 CHECK THE HORIZONTAL MOTOR CIRCUITS FOR A SHORT TO GROUND


- Disconnect: Horizontal Motor C362.
- Measure the resistance between:
- DSM C341B-9, circuit CPS06 (GN/WH), harness side and ground.
- DSM C341B-12, circuit CPS01 (GN/BU), harness side and ground.




- Are the resistances greater than 10,000 ohms?

Yes
INSTALL a new driver seat track assembly. REFER to Seat Track - Front Seat Track - Front. CLEAR the DTCs. REPEAT the self-test.

DISCONNECT the battery ground cable.

CONNECT driver seat safety belt buckle pretensioner C3065.

CONNECT driver seat side air bag module C3378.

REPOWER the SRS. REFER to Restraint Systems.

No
REPAIR the circuit(s). CLEAR the DTCs. REPEAT the self-test.

DISCONNECT the battery ground cable.

CONNECT driver seat safety belt buckle pretensioner C3065.

CONNECT driver seat side air bag module C3378.

REPOWER the SRS. REFER to Restraint Systems.

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A18 CHECK THE RECLINER MOTOR CIRCUITS FOR A SHORT TO GROUND


- Measure the resistance between:
- DSM C341B-13, circuit CPS07 (GY/BN), harness side and ground.
- DSM C341B-21, circuit CPS08 (VT/OG), harness side and ground.




- Are the resistances greater than 10,000 ohms?

Yes
INSTALL a new DSM. REFER to Body Control Systems. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.

DISCONNECT the battery ground cable.

CONNECT driver seat safety belt buckle pretensioner C3065.

CONNECT driver seat side air bag module C3378.

REPOWER the SRS. REFER to Restraint Systems.

No
GO to A19.

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A19 CHECK THE RECLINER MOTOR CIRCUITS FOR A SHORT TO GROUND


- Disconnect: Recliner Motor C3187.
- Measure the resistance between:
- DSM 341B-13, circuit CPS07 (GY/BN), harness side and ground.
- DSM C341B-21, circuit CPS08 (VT/OG), harness side and ground.




- Are the resistances greater than 10,000 ohms?

Yes
INSTALL a new seat recliner motor. REFER to Seat Recliner Motor - Front Seat Recliner Motor - Front. CLEAR the DTCs. REPEAT the self-test.

DISCONNECT the battery ground cable.

CONNECT driver seat safety belt buckle pretensioner C3065.

CONNECT driver seat side air bag module C3378.

REPOWER the SRS. REFER to Restraint Systems.

No
REPAIR the circuit(s). CLEAR the DTCs. REPEAT the self-test.

DISCONNECT the battery ground cable.

CONNECT driver seat safety belt buckle pretensioner C3065.

CONNECT driver seat side air bag module C3378.

REPOWER the SRS. REFER to Restraint Systems.

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A20 CHECK THE FRONT HEIGHT MOTOR FOR CORRECT OPERATION USING ACTIVE COMMANDS


- Ignition OFF.
- Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Restraint Systems.
- Disconnect: Driver Seat Side Air Bag Module C3378.
- Disconnect: Driver Seat Safety Belt Buckle Pretensioner C3065.
- Disconnect: 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. Refer to Battery.
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: DataLogger - DSM PIDs.
- Front Motor Up (FRONT_UP)
- Front Motor Down (FRONT_DWN)
- Measure the voltage between front height motor C382-2, circuit CPS03 (VT/GY) and C382-1, circuit CPS02 (GY/YE), harness side while using DSM active commands front motor up and front motor down, ON and OFF.




- Is the voltage greater than 10 volts when command ON in both directions and no voltage present when commanded OFF?

Yes
INSTALL a new driver seat track assembly. REFER to Seat Track - Front Seat Track - Front. CLEAR the DTCs. REPEAT the self-test.

DISCONNECT the battery ground cable.

CONNECT driver seat safety belt buckle pretensioner C3065.

CONNECT driver seat side air bag module C3378.

REPOWER the SRS. REFER to Restraint Systems.

No
GO to A21.

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A21 CHECK THE FRONT HEIGHT MOTOR CIRCUITS FOR A SHORT TO VOLTAGE


- Disconnect: DSM C341B.
- Ignition ON.
- Measure the voltage between:
- DSM C341B-23, circuit CPS03 (VT/GY), harness side and ground.
- DSM C341B-11, circuit CPS02 (GY/YE), harness side and ground.




- Is voltage present on either circuit?

Yes
REPAIR the circuit(s). CLEAR the DTCs. REPEAT the self-test.

DISCONNECT the battery ground cable.

CONNECT driver seat safety belt buckle pretensioner C3065.

CONNECT driver seat side air bag module C3378.

REPOWER the SRS. REFER to Restraint Systems.

No
GO to A22.

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A22 CHECK THE FRONT HEIGHT MOTOR CIRCUITS FOR AN OPEN


- Ignition OFF.
- Measure the resistance between:
- DSM C341B-23, circuit CPS03 (VT/GY), harness side and front height motor C382-2, circuit CPS03 (VT/GY), harness side.
- DSM C341B-11, circuit CPS02 (GY/YE), harness side and front height motor C382-1, circuit CPS02 (GY/YE), harness side.




- Are the resistances less than 5 ohms?

Yes
INSTALL a new DSM. REFER to Body Control Systems. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.

DISCONNECT the battery ground cable.

CONNECT driver seat safety belt buckle pretensioner C3065.

CONNECT driver seat side air bag module C3378.

REPOWER the SRS. REFER to Restraint Systems.

No
REPAIR the circuit(s). CLEAR the DTCs. REPEAT the self-test.

DISCONNECT the battery ground cable.

CONNECT driver seat safety belt buckle pretensioner C3065.

CONNECT driver seat side air bag module C3378.

REPOWER the SRS. REFER to Restraint Systems.

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A23 CHECK THE REAR HEIGHT MOTOR FOR CORRECT OPERATION USING ACTIVE COMMANDS


- Ignition OFF.
- Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Restraint Systems.
- Disconnect: Driver Seat Side Air Bag Module C3378.
- Disconnect: Driver Seat Safety Belt Buckle Pretensioner C3065.
- Disconnect: 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. Refer to Battery.
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: DataLogger - DSM PIDs.
- Rear Motor Up (REAR_UP)
- Rear Motor Down (REAR_DWN)
- Measure the voltage between rear height motor C363-1, circuit CPS05 (BU/WH), harness side and C363-5, circuit CPS04 (YE/OG), harness side while using active commands rear motor up and rear motor down, ON and OFF.




- Is the voltage greater than 10 volts when command ON in both directions and no voltage present when commanded OFF?

Yes
INSTALL a new driver seat track assembly. REFER to Seat Track - Front Seat Track - Front. CLEAR the DTCs. REPEAT the self-test.

DISCONNECT the battery ground cable.

CONNECT driver seat safety belt buckle pretensioner C3065.

CONNECT driver seat side air bag module C3378.

REPOWER the SRS. REFER to Restraint Systems.

No
GO to A24.

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A24 CHECK THE REAR HEIGHT MOTOR CIRCUITS FOR A SHORT TO VOLTAGE


- Disconnect: DSM C341B.
- Ignition ON.
- Measure the voltage between:
- DSM C341B-22, circuit CPS05 (BU/WH), harness side and ground.
- DSM C341B-10, circuit CPS04 (YE/OG), harness side and ground.




- Is voltage present on either circuit?

Yes
REPAIR the circuit(s). CLEAR the DTCs. REPEAT the self-test.

DISCONNECT the battery ground cable.

CONNECT driver seat safety belt buckle pretensioner C3065.

CONNECT driver seat side air bag module C3378.

REPOWER the SRS. REFER to Restraint Systems.

No
GO to A25.

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A25 CHECK THE REAR HEIGHT MOTOR CIRCUITS FOR AN OPEN


- Ignition OFF.
- Measure the resistance between:
- DSM C341B-22, circuit CPS05 (BU/WH), harness side and rear height motor C363-1, circuit CPS05 (BU/WH), harness side.
- DSM C341B-10, circuit CPS04 (YE/OG), harness side and rear height motor C363-5, circuit CPS04 (YE/OG), harness side.




- Are the resistances less than 5 ohms?

Yes
INSTALL a new DSM. REFER to Body Control Systems. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.

DISCONNECT the battery ground cable.

CONNECT driver seat safety belt buckle pretensioner C3065.

CONNECT driver seat side air bag module C3378.

REPOWER the SRS. REFER to Restraint Systems.

No
REPAIR the circuit(s). CLEAR the DTCs. REPEAT the self-test.

DISCONNECT the battery ground cable.

CONNECT driver seat safety belt buckle pretensioner C3065.

CONNECT driver seat side air bag module C3378.

REPOWER the SRS. REFER to Restraint Systems.

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A26 CHECK THE HORIZONTAL MOTOR FOR CORRECT OPERATION USING ACTIVE COMMANDS


- Ignition OFF.
- Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Restraint Systems.
- Disconnect: Driver Seat Side Air Bag Module C3378.
- Disconnect: Driver Seat Safety Belt Buckle Pretensioner C3065.
- Disconnect: 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. Refer to Battery.
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: DataLogger - DSM PIDs.
- Horizontal Motor Forward (HORZ_FWD)
- Horizontal Motor Backward (HORZ_BWD)
- Measure the voltage between horizontal motor C362-1, circuit CPS01 (GN/BU) and C362-2, circuit CPS06 (GN/WH), harness side while using the scan tool to operate DSM active commands horizontal motor forward and horizontal motor backward, ON and OFF.




- Is the voltage greater than 10 volts when command ON in both directions and no voltage present when commanded OFF?

Yes
INSTALL a new driver seat track assembly. REFER to Seat Track - Front Seat Track - Front. CLEAR the DTCs. REPEAT the self-test.

DISCONNECT the battery ground cable.

CONNECT driver seat safety belt buckle pretensioner C3065.

CONNECT driver seat side air bag module C3378.

REPOWER the SRS. REFER to Restraint Systems.

No
GO to A27.

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A27 CHECK THE HORIZONTAL MOTOR CIRCUITS FOR A SHORT TO VOLTAGE


- Disconnect: DSM C341B.
- Ignition ON.
- Measure the voltage between:
- DSM C341B-9, circuit CPS06 (GN/WH), harness side and ground.
- DSM C341B-12, circuit CPS01 (GN/BU), harness side and ground.




- Is voltage present on either circuit?

Yes
REPAIR the circuit(s). CLEAR the DTCs. REPEAT the self-test.

DISCONNECT the battery ground cable.

CONNECT driver seat safety belt buckle pretensioner C3065.

CONNECT driver seat side air bag module C3378.

REPOWER the SRS. REFER to Restraint Systems.

No
GO to A28.

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A28 CHECK THE HORIZONTAL MOTOR CIRCUITS FOR AN OPEN


- Ignition OFF.
- Measure the resistance between:
- DSM C341B-9, circuit CPS06 (GN/WH), harness side and horizontal motor C362-2, circuit CPS06 (GN/WH), harness side.
- DSM C341B-12, circuit CPS01 (GN/BU), harness side and horizontal motor C362-1, circuit CPS01 (GN/BU), harness side.




- Are the resistances less than 5 ohms?

Yes
INSTALL a new DSM. REFER to Body Control Systems. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.

DISCONNECT the battery ground cable.

CONNECT driver seat safety belt buckle pretensioner C3065.

CONNECT driver seat side air bag module C3378.

REPOWER the SRS. REFER to Restraint Systems.

No
REPAIR the circuit(s). CLEAR the DTCs. REPEAT the self-test.

DISCONNECT the battery ground cable.

CONNECT driver seat safety belt buckle pretensioner C3065.

CONNECT driver seat side air bag module C3378.

REPOWER the SRS. REFER to Restraint Systems.

-------------------------------------------------
A29 CHECK THE RECLINER MOTOR FOR CORRECT OPERATION USING ACTIVE COMMANDS


- Ignition OFF.
- Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Restraint Systems.
- Disconnect: Driver Seat Side Air Bag Module C3378.
- Disconnect: Driver Seat Safety Belt Buckle Pretensioner C3065.
- Disconnect: 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.
- Ignition ON.
- Enter the following diagnostic mode on the scan tool: DataLogger - DSM PIDs.
- Recline Motor Forward (RECL_FWD)
- Recline Motor Backward (RECL_BWD)
- Measure the voltage between recliner motor C3187-1, circuit CPS07 (GY/BN) and C3187-3, circuit CPS08 (VT/OG), harness side while using the scan tool to operate the DSM active commands recline motor forward and recline motor backward, ON and OFF.




- Is the voltage greater than 10 volts when command ON in both directions and no voltage present when commanded OFF?

Yes
INSTALL a new driver seat recliner motor. REFER to Seat Recliner Motor - Front Seat Recliner Motor - Front. CLEAR the DTCs. REPEAT the self-test.

DISCONNECT the battery ground cable.

CONNECT driver seat safety belt buckle pretensioner C3065.

CONNECT driver seat side air bag module C3378.

REPOWER the SRS. REFER to Restraint Systems.

No
GO to A30.

-------------------------------------------------
A30 CHECK THE RECLINER MOTOR CIRCUITS FOR A SHORT TO VOLTAGE


- Disconnect: DSM C341B.
- Ignition ON.
- Measure the voltage between:
- DSM C341B-13, circuit CPS07 (GY/BN), harness side and ground.
- DSM C341B-21, circuit CPS08 (VT/OG), harness side and ground.




- Is voltage present on either circuit?

Yes
REPAIR the circuit(s). CLEAR the DTCs. REPEAT the self-test.

DISCONNECT the battery ground cable.

CONNECT driver seat safety belt buckle pretensioner C3065.

CONNECT driver seat side air bag module C3378.

REPOWER the SRS. REFER to Restraint Systems.

No
GO to A31.

-------------------------------------------------
A31 CHECK THE RECLINER MOTOR CIRCUITS FOR AN OPEN


- Ignition OFF.
- Measure the resistance between:
- DSM C341B-13, circuit CPS07 (GY/BN), harness side and recliner motor C3187-1, circuit CPS07 (GY/BN), harness side.
- DSM C341B-21, circuit CPS08 (VT/OG), harness side and recliner motor C3187-3, circuit CPS08 (VT/OG), harness side.




- Are the resistances less than 5 ohms?

Yes
INSTALL a new DSM. REFER to Body Control Systems. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.

DISCONNECT the battery ground cable.

CONNECT driver seat safety belt buckle pretensioner C3065.

CONNECT driver seat side air bag module C3378.

REPOWER the SRS. REFER to Restraint Systems.

No
REPAIR the circuit(s). CLEAR the DTCs. REPEAT the self-test.

DISCONNECT the battery ground cable.

CONNECT driver seat safety belt buckle pretensioner C3065.

CONNECT driver seat side air bag module C3378.

REPOWER the SRS. REFER to Restraint Systems.

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