Pinpoint Test K: The Air Suspension Control Module Does Not Respond To The Diagnostic Tool

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

K1 CHECK THE AIR SUSPENSION CONTROL MODULE C2324B (EXPEDITION) OR C2131B (NAVIGATOR) FOR DAMAGE
- Key in OFF position.
- Disconnect: Air Suspension Control Module C2324b (Expedition).
- Disconnect: Air Suspension Control Module C2131b (Navigator).
- Inspect the air suspension control module C2324b (Expedition) or C2131b (Navigator) for damage.
- Is the air suspension control module C2324b (Expedition) or C2131b (Navigator) OK?
- Yes : GO to K2.
- No : REPAIR the air suspension control module C2324b (Expedition) or C2131b (Navigator). CARRY OUT the data link diagnostics test.
K2 CHECK CIRCUITS 2180 (WH/BK) AND 2181 (BK/YE) BETWEEN THE AIR SUSPENSION CONTROL MODULE C2324B (EXPEDITION) OR C2131B (NAVIGATOR) AND THE DATA LINK CONNECTOR (DLC) C251 FOR AN OPEN
- Measure the resistance between the air suspension control module C2324b pin 10 (Expedition) or C2131b pin 11 (Navigator), circuit 2180 (WH/BK), harness side and the DLC C251 pin 3, circuit 2180 (WH/BK), harness side.
  
  Fig 1: Measuring Resistance Between Air Suspension Control Module C2324B Pin 10 (Expedition) Or C2131B Pin 11 (Navigator), Circuit 2180 (WH/BK) And DLC C251 Pin 3, Circuit 2180 (WH/BK)
  Courtesy of FORD MOTOR CO.
- Measure the resistance between the air suspension control module C2324b pin 11 (Expedition) or C2131b pin 12 (Navigator), circuit 2181 (BK/YE), harness side and the DLC C251 pin 11, circuit 2181 (BK/YE), harness side.
  
  Fig 2: Measuring Resistance Between Air Suspension Control Module C2324B Pin 11 (Expedition) Or C2131B Pin 12 (Navigator), Circuit 2181 (BK/YE) And DLC C251 Pin 11, Circuit 2181 (BK/YE)
  Courtesy of FORD MOTOR CO.
- Are the resistances less than 5 ohms?
- Yes : GO to K3.
- No : REPAIR the circuit in question. CARRY OUT the data link diagnostics test.
K3 CHECK FOR CORRECT AIR SUSPENSION CONTROL MODULE OPERATION
- Disconnect all the air suspension control module connectors.
- Check for:
  - corrosion
  - pushed-out pins
- Connect all the air suspension control module 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 air suspension control module. REFER to VEHICLE DYNAMIC SUSPENSION . CLEAR the diagnostic trouble codes (DTCs). REPEAT the self-test. CARRY OUT the data link diagnostics 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 data link diagnostics test.