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

WARNING: This page is about a different car, the 2004 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.

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.

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.

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.

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.