LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lincoln >> 2000 >> LS 3.9 A >> Repair and Diagnosis >> External Pages >> Different car >> Section 669 (Module Communications Network) >> Diagnosis And Testing >> Communications Network >> Pinpoint Test I: The Driver Seat Module (DSM) Does Not Respond To The Diagnostic Tool >> Normal Operation
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Normal Operation

WARNING: This page is about a different car, the 2005 Lincoln LS. However, it is still accessible from the selected car via links, so may be relevant.

The DSM communicates with the diagnostic tool through the standard corporate protocol (SCP) communications network circuits 4-AH80 (GY/WH) and 5-AH80 (BU/OG). If circuit 4-AH80 (GY/WH) or 5-AH80 (BU/OG) becomes open or shorted to ground, communications to that module is not possible. Check circuits 4-AH80 (GY/WH) and 5-AH80 (BU/OG) between the DSM C341c and the data link connector (DLC) C251. The total resistance values must not be more than 5 ohms. If the resistance is more than 5 ohms, there is either an open in circuit 4-AH80 (GY/WH) or 5-AH80 (BU/OG), damage to the DLC C251, damage to the DSM C341c, or a problem with the interior auxiliary junction box (AJB) C283c, interior AJB C283d or joint connector No. 4 C223.

scientia non olet · About LEMON Manuals