Pinpoint Test D: The Driver Seat Module (DSM) Does Not Respond To The Diagnostic Tool

Test Step 

D1 CHECK THE DSM C341c FOR DAMAGE 

• Key in OFF position.
• Inspect the DSM C341c for damage.
• Is the DSM C341c OK 

Result / Action to Take 

Yes 

GO to D2.

No 

REPAIR the DSM C341c. CARRY OUT the diagnostic tool data link test.

Test Step 

D2 CHECK CIRCUITS 914 (TN/OG) AND 915 (PK/LB) FOR AN OPEN BETWEEN THE DLC C251 AND THE DSM C341c 

• Measure the resistance between the DSM C341c pin 25, circuit 914 (TN/OG), harness side and the DLC C251 pin 2, circuit 914 (TN/OG), harness side.
  Fig 1: Checking Circuits 914 (TN/OG) For An Open Between DLC C251 And DSM C341c

  Courtesy of FORD MOTOR CO.
• Measure the resistance between the DSM C341c pin 26, circuit 915 (PK/LB), harness side and the DLC C251 pin 10, circuit 915 (PK/LB), harness side.
  Fig 2: Checking Circuits 915 (PK/LB) For An Open Between DLC C251 And DSM C341c

  Courtesy of FORD MOTOR CO.
• Are the resistances less than 5 ohms? 

Result / Action to Take 

Yes 

GO to D3.

No 

REPAIR the circuit in question. CARRY OUT the diagnostic tool data link test.

Test Step 

D3 CHECK FOR CORRECT DSM OPERATION 

• Disconnect all the DSM connectors.
• Check for:
  • corrosion
  • pushed-out pins
• Connect all the DSM connectors and make sure they seat correctly.
• Operate the system and verify the concern is still present.
• Is the concern still present? 

Result / Action to Take 

Yes 

INSTALL a new DSM. REFER to MULTIFUNCTION ELECTRONIC CONTROL MODULES . CARRY OUT the diagnostic tool data link test.

No 

The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test.