Operation CHARM: Car repair manuals for everyone.
Home >> Ford Truck >> 2012 >> F 150 4WD V8-5.0L >> Repair and Diagnosis >> Body and Frame >> Seats >> Testing and Inspection >> Pinpoint Tests >> Pinpoint Test E: The Power Seat Does Not Move Horizontally/Vertically/Recline - Driver, With Memory >> E12-E22

E12-E22




Seats

Pinpoint Test E: The Power Seat Does Not Move Horizontally/Vertically/Recline - Driver, With Memory

Normal Operation

The seat control switch supplies voltage and ground to the applicable Driver Seat Module (DSM) inputs. The DSM (Driver Seat Module) then supplies voltage and ground to 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/backward) and vertically (front up/down and rear up/down). The seat recliner mechanism uses a single motor to pivot the seat backrest forward and backward.

The following pinpoint test diagnoses a power seat with memory that does not operate or does not operate correctly. If the seat does not operate using the memory SET switch or operates in one second intervals, GO to Pinpoint Test F. Pinpoint Test F: Memory Seat Does Not Operate Correctly - Operates In One Second Intervals/Memory Seat Recall Not functioning





This pinpoint test is intended to diagnose the following:

- Fuse

- Wiring, terminals or connectors

- Seat control switch

- Power seat motor

- Seat track

- DSM (Driver Seat Module)

PINPOINT TEST E : THE POWER SEAT DOES NOT MOVE HORIZONTALLY/VERTICALLY/RECLINE - DRIVER, WITH MEMORY

NOTE:
If a seat equipped with a seat mounted side air bag is being repaired, the Supplemental Restraint System (SRS) must be depowered. Refer to Restraints and Safety Systems &/or Air Bag Systems.
NOTE:
The air bag warning lamp illuminates when the Restraints Control Module (RCM) fuse is removed and the ignition switch is ON. This is normal operation and does not indicate an SRS (Supplemental Restraint System) fault.
NOTE:
The SRS (Supplemental Restraint System) must be fully operational and free of faults before releasing the vehicle to the customer.
NOTE:
If a new DSM (Driver Seat Module) has been installed, all seat soft stops must be reset. If a new seat track or recline motor has been installed, only reset the soft stops for that component being installed new. To reset the soft stops, refer to Principles of Operation. Principles of Operation
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.


E12 CHECK THE FRONT HEIGHT MOTOR CIRCUITS FOR A SHORT TO VOLTAGE

- Ignition OFF.

- Disconnect: DSM (Driver Seat Module) C341B.

- Ignition ON.

- Measure the voltage between:
- DSM (Driver Seat Module) C341B-23, circuit CPS03 (VT/GY), harness side and ground.

- DSM (Driver Seat Module) C341B-11, circuit CPS02 (GY/YE), harness side and ground.







Is any 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 side air bag module C3051.

REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
No
GO to E13.

E13 CHECK FRONT HEIGHT MOTOR CIRCUITS FOR AN OPEN

- Ignition OFF.

- Measure the resistance between:
- DSM (Driver Seat Module) C341B-23, circuit CPS03 (VT/GY), harness side and front height motor C382-2, circuit CPS03 (VT/GY), harness side.

- DSM (Driver Seat Module) 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 (Driver Seat Module). REFER to Driver Seat Module (DSM) . CLEAR the DTCs. REPEAT the self-test.

DISCONNECT the battery ground cable.

CONNECT driver seat side air bag module C3051.

REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
No
REPAIR the circuit(s). CLEAR the DTCs. REPEAT the self-test.

DISCONNECT the battery ground cable.

CONNECT driver seat side air bag module C3051.

REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.

E14 CHECK THE REAR HEIGHT MOTOR FOR CORRECT OPERATION USING ACTIVE COMMANDS

- Ignition OFF.

- Depower the SRS (Supplemental Restraint System). Refer to Restraints and Safety Systems &/or Air Bag Systems.

- Disconnect: Driver Seat Side Air Bag Module C3051.

- 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.

- Ignition ON.

- Enter the following diagnostic mode on the scan tool: DataLogger- DSM (Driver Seat Module).
- 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 the scan tool to operate DSM (Driver Seat Module) 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 seat track assembly. REFER to Seat Track . CLEAR the DTCs. REPEAT the self-test.

DISCONNECT the battery ground cable.

CONNECT driver seat side air bag module C3051.

REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
No
GO to E15.

E15 CHECK THE REAR HEIGHT MOTOR CIRCUITS FOR A SHORT TO VOLTAGE

- Ignition OFF.

- Disconnect: DSM (Driver Seat Module) C341B.

- Ignition ON.

- Measure the voltage between:
- DSM (Driver Seat Module) C341B-22, circuit CPS05 (BU/WH), harness side and ground.

- DSM (Driver Seat Module) C341B-10, circuit CPS04 (YE/OG), harness side and ground.







Is any 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 side air bag module C3051.

REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
No
GO to E16.

E16 CHECK REAR HEIGHT MOTOR CIRCUITS FOR AN OPEN

- Ignition OFF.

- Measure the resistance between:
- DSM (Driver Seat Module) C341B-22, circuit CPS05 (BU/WH), harness side and rear height motor C363-1, circuit CPS05 (BU/WH), harness side.

- DSM (Driver Seat Module) 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 (Driver Seat Module). REFER to Driver Seat Module (DSM) . CLEAR the DTCs. REPEAT the self-test.

DISCONNECT the battery ground cable.

CONNECT driver seat side air bag module C3051.

REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
No
REPAIR the circuit(s). CLEAR the DTCs. REPEAT the self-test.

DISCONNECT the battery ground cable.

CONNECT driver seat side air bag module C3051.

REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.

E17 CHECK THE HORIZONTAL MOTOR FOR CORRECT OPERATION USING ACTIVE COMMANDS

- Ignition OFF.

- Depower the SRS (Supplemental Restraint System). Refer to Restraints and Safety Systems &/or Air Bag Systems.

- Disconnect: Driver Seat Side Air Bag Module C3051.

- 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.

- Ignition ON.

- Enter the following diagnostic mode on the scan tool: DataLogger- DSM (Driver Seat Module).
- 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 (Driver Seat Module) 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 seat track assembly. REFER to Seat Track . CLEAR the DTCs. REPEAT the self-test.

DISCONNECT the battery ground cable.

CONNECT driver seat side air bag module C3051.

REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
No
GO to E18.

E18 CHECK THE HORIZONTAL MOTOR CIRCUITS FOR A SHORT TO VOLTAGE

- Disconnect: DSM (Driver Seat Module) C341B.

- Ignition ON.

- Measure the voltage between:
- DSM (Driver Seat Module) C341B-9, circuit CPS06 (GN/WH), harness side and ground.

- DSM (Driver Seat Module) C341B-12, circuit CPS01 (GN/BU), harness side and ground.







Is any 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 side air bag module C3051.

REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
No
GO to E19.

E19 CHECK THE HORIZONTAL MOTOR CIRCUITS FOR AN OPEN

- Ignition OFF.

- Measure the resistance between:
- DSM (Driver Seat Module) C341B-12, circuit CPS01 (GN/BU), harness side and horizontal motor C362-1, circuit CPS01 (GN/BU), harness side.

- DSM (Driver Seat Module) C341B-9, circuit CPS06 (GN/WH), harness side and horizontal motor C362-2, circuit CPS06 (GN/WH), harness side.







Are the resistances less than 5 ohms?

Yes
INSTALL a new DSM (Driver Seat Module). REFER to Driver Seat Module (DSM) . CLEAR the DTCs. REPEAT the self-test.

DISCONNECT the battery ground cable.

CONNECT driver seat side air bag module C3051.

REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
No
REPAIR the circuit(s). CLEAR the DTCs. REPEAT the self-test.

DISCONNECT the battery ground cable.

CONNECT driver seat side air bag module C3051.

REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.

E20 CHECK THE RECLINER MOTOR FOR CORRECT OPERATION USING ACTIVE COMMANDS

- Ignition OFF.

- Depower the SRS (Supplemental Restraint System). Refer to Restraints and Safety Systems &/or Air Bag Systems.

- Disconnect: Driver Seat Side Air Bag Module C3051.

- Disconnect: 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.

- Ignition ON.

- Enter the following diagnostic mode on the scan tool: DataLogger- DSM (Driver Seat Module).
- Recline Motor Forward (RECL_FWD)
- Recline Motor Backward (RECL_BWD)


- Measure the voltage between seat 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 (Driver Seat Module) 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 seat recliner motor. REFER to Seat Recliner Motor . CLEAR the DTCs. REPEAT the self-test.

DISCONNECT the battery ground cable.

CONNECT driver seat side air bag module C3051.

REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
No
GO to E21.

E21 CHECK THE RECLINER MOTOR CIRCUITS FOR A SHORT TO VOLTAGE

- Ignition OFF.

- Disconnect: DSM (Driver Seat Module) C341B.

- Ignition ON.

- Measure the voltage between:
- DSM (Driver Seat Module) C341B-13, circuit CPS07 (GY/BN), harness side and ground.

- DSM (Driver Seat Module) C341B-21, circuit CPS08 (VT/OG), harness side and ground.







Is any 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 side air bag module C3051.

REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
No
GO to E22.

E22 CHECK THE RECLINER MOTOR CIRCUITS FOR AN OPEN

- Ignition OFF.

- Measure the resistance between:
- DSM (Driver Seat Module) C341B-13, circuit CPS07 (GY/BN), harness side and recliner motor C3187-1, circuit CPS07 (GY/BN), harness side.

- DSM (Driver Seat Module) 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 (Driver Seat Module). REFER to Driver Seat Module (DSM) . CLEAR the DTCs. REPEAT the self-test.

DISCONNECT the battery ground cable.

CONNECT driver seat side air bag module C3051.

REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
No
REPAIR the circuit(s). CLEAR the DTCs. REPEAT the self-test.

DISCONNECT the battery ground cable.

CONNECT driver seat side air bag module C3051.

REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.

pro multis · About Operation CHARM