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Part 1




Seats

Pinpoint Tests

Pinpoint Test L: The Memory Seat is Inoperative/Does Not Operate Correctly - Does Not Operate Horizontally/Vertically/Recline

Refer to Wiring Diagram Set 123 (Fusion/Milan/MKZ, Fusion Hybrid/Milan Hybrid), Memory Seats for schematic and connector information. Diagrams By Number

Normal Operation

The driver seat control switch is supplied battery voltage on circuit SBP12 (GN/RD) and ground on circuit GD126 (BK/WH). When pressed, the seat control switch supplies voltage and ground to the applicable Driver Seat Module (DSM) inputs. The DSM then supplies voltage and ground to the appropriate power seat track motor or power recliner motor based on the inputs received from the seat control switch. There are 3 power seat track motors that combine to move the seat horizontally (forward/rearward) and vertically (front up/down and rear up/down). The recliner mechanism uses a single motor to pivot the seat backrest forward and rearward.

Battery voltage is also supplied to the DSM on circuits SBP12 (GN/RD) and SBB32 (VT/RD). Ground is supplied on circuit GD126 (BK/WH).

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 M. Pinpoint Test M: The Memory Seat Does Not Operate Correctly - Does Not Operate Using The Memory SET Switch

B1342-B1731:





This pinpoint test is intended to diagnose the following:
- Fuse
- Wiring, terminals or connectors
- Seat control switch
- Seat track
- Seat recliner motor
- DSM



PINPOINT TEST L: THE MEMORY SEAT IS INOPERATIVE/DOES NOT OPERATE CORRECTLY - DOES NOT OPERATE HORIZONTALLY/VERTICALLY/RECLINE

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.

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.

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L1 CHECK THE TCM TRANSMISSION RANGE (TR) PID


- Ignition ON.
- Enter the following diagnostic mode on the scan tool: DataLogger - TCM - PID: TR .
- NOTE: D6_PRK applies to both park and overdrive.
- Operate the transmission gear selector in all positions while monitoring the TCM PID TR states.
- Do the PID states agree with the selected positions?

Yes
GO to L2.

No
To diagnose a transmission gear selector (PRNDL) status concern, REFER to Automatic Transmission/Transaxle.

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L2 CHECK THE DSM IGNITION SWITCH STATUS (IGN_SW) PID


- Enter the following diagnostic mode on the scan tool: DataLogger - DSM - PID: IGN_SW .
- Cycle the ignition in all positions while monitoring the DSM PID states.
- Do the PID states agree with the selected positions?

Yes
GO to L3.

No
To diagnose an ignition status concern, REFER to Steering Column.

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L3 RETRIEVE THE DSM DTCs


- Operate the memory seat and memory exterior mirrors in all directions through the full range of travel.
- Place the memory seat and memory exterior mirrors in central travel positions.
- Enter the following diagnostic mode on the scan tool: Self Test - DSM .
- Are any DTCs retrieved?

Yes
If DTCs B1663, B1664, B1665 and B1666 are all retrieved, GO to L12.

If DTC B1663, GO to L22.

If DTC B1664, GO to L25.

If DTC B1665, GO to L28.

If DTC B1666, GO to L31.

If DTC B1703, GO to L5.

If DTC B1707, GO to L5.

If DTC B1711, GO to L5.

If DTC B1715, GO to L5.

If DTC B1719, GO to L5.

If DTC B1723, GO to L5.

If DTC B1727, GO to L5.

If DTC B1731, GO to L5.

If DTC B1342, INSTALL a new DSM. REFER to Body Control Systems. REPEAT the self-test. CLEAR the DTCs.

For any other DSM DTCs, REFER to the Driver Seat Module (DSM) DTC Chart. Driver Seat Module (DSM) DTC Chart

No
GO to L4.

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L4 CHECK THE DSM SEAT CONTROL SWITCH PIDs


- Enter the following diagnostic mode on the scan tool: DataLogger - DSM - PIDs .
- Driver Power Seat Front Up/Down Switch (SFNT_SW)
- Driver Power Seat Forward/Backward Switch (SFWD_SW)
- Driver Power Seat Rear Up/Down Switch (SREARSW)
- Driver Power Seat Recline Switch Status (SRCL_SW)
- Operate the seat control switch in all positions and monitor the DSM seat control switch PIDs.
- Do the PID states agree with the switch positions?

Yes
GO to L11.

No
VERIFY Smart Junction Box (SJB) fuse 12 (7.5A) is OK.

If SJB fuse 12 (7.5A) fails while operating the seat control switch, DISCONNECT the seat control switch C3297 and GO to L9.

If SJB fuse 12 (7.5A) is OK, GO to L5.

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L5 CHECK THE SEAT CONTROL SWITCH


- Remove the seat control switch. Refer to Seat Control Switch Seat Control Switch.
- Check the seat control switch.

- Is the seat control switch OK?

Yes
GO to L6.

No
INSTALL a new seat control switch. REFER to Seat Control Switch Seat Control Switch. REPEAT the self-test. CLEAR the DTCs.

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L6 CHECK FOR VOLTAGE TO THE SEAT CONTROL SWITCH


- 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 C327 .
- 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 the voltage between seat control switch C3297-5, circuit SBP12 (GN/RD), harness side and ground.




- Is the voltage greater than 10 volts?

Yes
GO to L7.

No
VERIFY SJB fuse 12 (7.5A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the Wiring Diagrams to identify the possible causes of the circuit short Diagrams By Number. REPEAT the self-test. CLEAR the DTCs.

CONNECT driver seat side air bag module C327. REPOWER the SRS. REFER to Restraint Systems.

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L7 CHECK FOR GROUND TO THE SEAT CONTROL SWITCH


- Measure the resistance between seat control switch C3297-3, circuit GD126 (BK/WH), harness side and ground.




- Is the resistance less than 5 ohms?

Yes
GO to L8.

No
REPAIR the circuit. REPEAT the self-test. CLEAR the DTCs.

DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327. REPOWER the SRS. REFER to Restraint Systems.

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L8 CHECK CIRCUITS BETWEEN THE SEAT CONTROL SWITCH AND DSM FOR A SHORT TO VOLTAGE


- Disconnect: DSM C3299b .
- Ignition ON.
- Measure the voltage between seat control switch C3297, harness side and ground using the following chart:









- Is voltage present on any circuits?

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

DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327. REPOWER the SRS. REFER to Restraint Systems.

No
GO to L9.

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L9 CHECK CIRCUITS BETWEEN THE SEAT CONTROL SWITCH AND DSM FOR A SHORT TO GROUND


- 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 C327 .
- Disconnect: DSM C3299b .
- Disconnect: Driver Seat Control Switch C3297 .
- 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 the resistance between seat control switch C3297 pins, harness side and ground using the following chart:









- Are the resistances greater than 10,000 ohms?

Yes
GO to L10.

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

DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327. REPOWER the SRS. REFER to Restraint Systems.

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L10 CHECK CIRCUITS BETWEEN THE SEAT CONTROL SWITCH AND DSM FOR AN OPEN


- Measure the resistance between seat control switch C3297, harness side and DSM C3299b pins, harness side using the following chart:









- Are the resistances less than 5 ohms?

Yes
INSTALL a new DSM. REFER to Body Control Systems. REPEAT the self-test. CLEAR the DTCs.

DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327. REPOWER the SRS. REFER to Restraint Systems.

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

DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327. REPOWER the SRS. REFER to Restraint Systems.

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L11 CHECK SEAT TRACK OPERATION USING DSM SEAT TRACK MOTOR PIDs


- Enter the following diagnostic mode on the scan tool: DataLogger - DSM - PIDs .
- Front Motor Up (FRONT_UP)
- Front Motor Down (FRONT_DWN)
- Rear Motor Up (REAR_UP)
- Rear Motor Down (REAR_DWN)
- Horizontal Motor Forward (HORZ_FWD)
- Horizontal Motor Backward (HORZ_BWD)
- Recline Motor Backward (RECL_BWD)
- Recline Motor Forward (RECL_FWD)
- Toggle the DSM active commands ON and OFF while monitoring the seat movement.
- Does the driver seat operate correctly?

Yes
The condition may be intermittent. CHECK for causes of an intermittent concern, particularly the pins and terminals of electrical connectors that were disconnected. Do not install any new components at this time. Components should only be installed when directed to do so in the pinpoint test. REPAIR any intermittent wiring, terminal or connector concerns found. REPEAT the self-test. CLEAR the DTCs.

DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327. REPOWER the SRS. REFER to Restraint Systems.

No
If no seat movement, GO to L12.

If no front vertical seat movement, GO to L22.

If no rear vertical seat movement, GO to L25.

If no horizontal seat movement, GO to L28.

If no recline seat movement, GO to L31.

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L12 CHECK FOR VOLTAGE TO THE DSM


- 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 C327 .
- Disconnect: DSM C3299a .
- 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 the voltage between DSM C3299a-1, circuit SBB32 (VT/RD), harness side and ground.




- Is the voltage greater than 10 volts?

Yes
GO to L13.

No
VERIFY Battery Junction Box (BJB) fuse 32 (30A) is OK. If OK, REPAIR the circuit. If not OK, REFER to the Wiring Diagrams to identify the possible causes of the circuit short Diagrams By Number. REPEAT the self-test. CLEAR the DTCs.

DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327. REPOWER the SRS. REFER to Restraint Systems.

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L13 CHECK FOR GROUND TO THE DSM


- Disconnect: DSM C3299b .
- Measure the resistance between:
- DSM C3299a-2, circuit GD126 (BK/WH), harness side and ground.
- DSM C3299b-24, circuit GD126 (BK/WH), harness side and ground.




- Is the resistance less than 5 ohms?

Yes
GO to L14.

No
REPAIR the circuit. REPEAT the self-test. CLEAR the DTCs.

DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327. REPOWER the SRS. REFER to Restraint Systems.

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L14 CHECK THE FRONT HEIGHT MOTOR CIRCUITS FOR A SHORT TO GROUND


- Disconnect: DSM C3299b .
- Measure the resistance between:
- DSM C3299b-23, circuit CPS25 (WH/VT), harness side and ground.
- DSM C3299b-11, circuit CPS24 (GY), harness side and ground.




- Are the resistances greater than 10,000 ohms?

Yes
GO to L16.

No
GO to L15.

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L15 CHECK THE FRONT HEIGHT MOTOR CIRCUITS FOR A SHORT TO GROUND


- Disconnect: Power Seat Motor C357 .
- Measure the resistance between:
- DSM C3299b-23, circuit CPS25 (WH/VT), harness side and ground.
- DSM C3299b-11, circuit CPS24 (GY), harness side and ground.




- Are the resistances greater than 10,000 ohms?

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

DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327. REPOWER the SRS. REFER to Restraint Systems.

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

DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C327. REPOWER the SRS. REFER to Restraint Systems.

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