Pinpoint Test D: The Instrument Cluster Does Not Respond To The Diagnostic Tool

WARNING: This page is about a different car, the 2004 Mercury Monterey and 2004 Ford Freestar. However, it is still accessible from the selected car via links, so may be relevant.

D1 CHECK FOR AN OPEN BETWEEN THE DLC C251 AND THE INSTRUMENT CLUSTER C220a
- Key in OFF position.
- Disconnect: Instrument Cluster C220a.
- Measure the resistance between the instrument cluster C220a-10, circuit 914 (TN/OG), harness side and the DLC C251-2, circuit 914 (TN/OG), harness side.
  
  Fig 1: Measuring Resistance Between The Instrument Cluster C220A-10, Circuit 914 (TN/OG), Harness Side And The DLC C251-2, Circuit 914 (TN/OG), Harness Side
  Courtesy of FORD MOTOR CO.
- Measure the resistance between the instrument cluster C220a-9, circuit 915 (PK/LB), harness side and the DLC C251-10, circuit 915 (PK/LB), harness side.
  
  Fig 2: Measuring Resistance Between The Instrument Cluster C220A-9, Circuit 915 (PK/LB), Harness Side And The DLC C251-10, Circuit 915 (PK/LB), Harness Side
  Courtesy of FORD MOTOR CO.
- Are the resistances less than 5 ohms?
Yes

GO to D2

No

REPAIR the circuit in question. CLEAR the DTCs. REPEAT the self-test. CARRY OUT the data link diagnostics test.
D2 CHECK FOR CORRECT INSTRUMENT CLUSTER OPERATION
- Disconnect all the instrument cluster connectors.
- Check for:
  - Corrosion
  - push-out pins
- Connect all the instrument cluster 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 instrument cluster. Refer to INFORMATION, GAUGES & WARNING DEVICES . CLEAR the DTCs. REPEAT the self-test. CARRY OUT the data link diagnostics test.

No

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. CARRY OUT the data link diagnostics test.