Pinpoint Test J:THE DRIVER DOOR MODULE (DDM) DOES NOT RESPOND TO THE DIAGNOSTIC TOOL

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.

J1 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 J2.
- No : REPAIR the DDM C501a as necessary. TEST the system for normal operation.
J2 CHECK FOR AN OPEN BETWEEN THE DATA LINK CONNECTOR (DLC) C251 AND THE DDM C501A
- Measure the resistance between the DDM C501a-3, circuit 4-EG13 (GY/OG), harness side and the DLC C251-2, circuit 4-EG7 (GY/RD), harness side.
  
  Fig 1: Measuring The Resistance Between The DDM C501a-3, Circuit 4-EG13 (GY/OG), Harness Side And The DLC C251-2, Circuit 4-EG7 (GY/RD)
  Courtesy of FORD MOTOR CO.
- Measure the resistance between the DDM C501a-4, circuit 5-EG13 (BU/BK), harness side and the DLC C251-10, circuit 5-EG7 (BU/RD), harness side.
  
  Fig 2: Measuring The Resistance Between The DDM C501a-4, Circuit 5-EG13 (BU/BK), Harness Side And The DLC C251-10, Circuit 5-EG7 (BU/RD)
  Courtesy of FORD MOTOR CO.
- Are the resistances less than 5 ohms?
- Yes : GO to J7.
- No : GO to J3.
J3 CHECK FOR AN OPEN BETWEEN THE INTERIOR AUXILIARY JUNCTION BOX (AJB) C283A AND THE DDM C501A
- Disconnect: Interior AJB C283a.
- Measure the resistance between the DDM C501a-3, circuit 4-EG13 (GY/OG), harness side and the interior AJB C283a-8, circuit 4-EG13 (GY/OG), harness side.
  
  Fig 3: Measuring The Resistance Between The DDM C501a-3, Circuit 4-EG13 (GY/OG), Harness Side And The Interior AJB C283a-8, Circuit 4-EG13 (GY/OG), Harness Side
  Courtesy of FORD MOTOR CO.
- Measure the resistance between the DDM C501a-4, circuit 5-EG13 (BU/BK), harness side and the interior AJB C283a-4, circuit 5-EG13 (BU/BK), harness side.
  
  Fig 4: Measuring The Resistance Between The DDM C501a-4, Circuit 5-EG13 (BU/BK), Harness Side And The Interior AJB C283a-4, Circuit 5-EG13 (BU/BK)
  Courtesy of FORD MOTOR CO.
- Are the resistances less than 5 ohms?
- Yes : GO to J4.
- No : REPAIR the circuit in question. TEST the system for normal operation.
J4 CHECK FOR AN OPEN BETWEEN THE INTERIOR AJB C283A AND THE INTERIOR AJB C283D
- Disconnect: Interior AJB C283d.
- Measure the resistance between the interior AJB C283d-16, component side and the interior AJB C283a-8, component side.
  
  Fig 5: Measuring The Resistance Between The Interior AJB C283d-16, Component Side And The Interior AJB C283a-8, Component Side
  Courtesy of FORD MOTOR CO.
- Measure the resistance between the interior AJB C283d-12, component side and the interior AJB C283a-4, component side.
  
  Fig 6: Measuring The Resistance Between The Interior AJB C283d-12, Component Side And The Interior AJB C283a-4, Component Side
  Courtesy of FORD MOTOR CO.
- Are the resistances less than 5 ohms?
- Yes : GO to J5.
- No : INSTALL a new interior AJB. TEST the system for normal operation.
J5 CHECK FOR AN OPEN BETWEEN THE INTERIOR AJB C283D AND JOINT CONNECTOR NO. 4 C223
- Disconnect: Joint Connector No. 4 C223.
- Measure the resistance between the interior AJB C283d-16, circuit 4-EG1 (GY/RD), harness side and joint connector No. 4 C223-12, circuit 4-EG1 (GY/RD), harness side.
  
  Fig 7: Measuring Resistance Between Interior AJB C283d-16, Circuit 4-EG1 (GY/RD), Harness Side And Joint Connector No. 4 C223-12, Circuit 4-EG1 (GY/RD), Harness Side
  Courtesy of FORD MOTOR CO.
- Measure the resistance between the interior AJB C283d-12, circuit 5-EG1 (BU/RD), harness side and joint connector No. 4 C223-11, circuit 5-EG1 (BU/RD), harness side.
  
  Fig 8: Measuring Resistance Between Interior AJB C283d-12, Circuit 5-EG1 (BU/RD), Harness Side And Joint Connector No. 4 C223-11, Circuit 5-EG1 (BU/RD), Harness Side
  Courtesy of FORD MOTOR CO.
- Are the resistances less than 5 ohms?
- Yes : GO to J6.
- No : REPAIR the circuit in question. TEST the system for normal operation.
J6 CHECK JOINT CONNECTOR NO. 4 FOR AN OPEN
- Measure the resistance between joint connector No. 4 C223-12, component side and joint connector No. 4 C223-14, component side.
  
  Fig 9: Measuring The Resistance Between Joint Connector No. 4 C223-12, Component Side And Joint Connector No. 4 C223-14, Component Side
  Courtesy of FORD MOTOR CO.
- Measure the resistance between joint connector No. 4 C223-9, component side and joint connector No. 4 C223-11, component side.
  
  Fig 10: Measuring The Resistance Between Joint Connector No. 4 C223-9, Component Side And Joint Connector No. 4 C223-11, Component Side
  Courtesy of FORD MOTOR CO.
- Are the resistances less than 5 ohms?
- Yes : REPAIR the circuit in question between the DLC C251 and joint connector No. 4 C223. CARRY OUT the diagnostic tool data link test.
- No : REPAIR joint connector No. 4 C223. TEST the system for normal operation.
J7 CHECK FOR CORRECT DDM OPERATION
- Disconnect all the DDM connectors.
- Check for:
- corrosion
- push-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 . TEST the system for normal operation. 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.