Pinpoint Test C: The Driver Door Module (DDM) Does Not Respond To The Diagnostic Tool
WARNING: This page is about a different car, the 2005 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.
- C1 CHECK THE DDM C501A FOR DAMAGE
- Key in OFF position.
- Disconnect: DDM C501a.
- Inspect the DDM C501a for damage.
- Is the DDM C501a OK?
- Yes : GO to C2.
- No : REPAIR the DDM C501a as necessary. CARRY OUT the diagnostic tool data link test.
- C2 CHECK CIRCUITS 914 (TN/OG) AND 915 (PK/LB) FOR AN OPEN BETWEEN THE DATA LINK CONNECTOR (DLC) C251 AND THE DDM C501A
- Key in OFF position.
- Measure the resistance between the DDM C501a pin 15, circuit 914 (TN/OG), harness side and the DLC C251 pin 2, circuit 914 (TN/OG), harness side.
- Measure the resistance between the DDM C501a pin 14, circuit 915 (PK/LB), harness side and the DLC C251 pin 10, circuit 915 (PK/LB), harness side.
- Are the resistances less than 5 ohms?
- Yes : GO to C3.
- No : REPAIR the circuit in question. CARRY OUT the diagnostic tool data link test.
- C3 CHECK FOR CORRECT DDM OPERATION
- Disconnect all the DDM connectors.
- Check for:
- corrosion
- pushed-out pins
- Connect all the DDM connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
- Yes : INSTALL a new DDM. Refer to MULTIFUNCTION ELECTRONIC MODULES . CARRY OUT the diagnostic tool data link test.
- No : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test. CARRY OUT the diagnostic tool data link test.