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

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

F1 CHECK THE INSTRUMENT CLUSTER C220A FOR DAMAGE
- Key in OFF position.
- Depower the air bag system. Refer to SUPPLEMENTAL RESTRAINT SYSTEM .
- Disconnect: Instrument Cluster C220a.
- Inspect the instrument cluster C220a for damage.
- Is the instrument cluster C220a OK?
- Yes : GO to F2.
- No : REPAIR the instrument cluster C220a as necessary. CONNECT the instrument cluster C220a. REPOWER the air bag system. REFER to SUPPLEMENTAL RESTRAINT SYSTEM . CARRY OUT the data link diagnostics test.
F2 CHECK CIRCUITS 1827 (WH/LG) AND 1828 (PK/LG) FOR AN OPEN BETWEEN THE DATA LINK CONNECTOR (DLC) AND THE INSTRUMENT CLUSTER C220A
- Measure the resistance between the DLC C251-6, circuit 1827 (WH/LG), harness side and the instrument cluster C220a-31, circuit 1827 (WH/LG), harness side.
  
  Fig 1: Measuring Resistance Between DLC C251-6, Circuit 1827 (WH/LG), Harness Side And Instrument Cluster C220a-31, Circuit 1827 (WH/LG), Harness Side
  Courtesy of FORD MOTOR CO.
- Measure the resistance between the DLC C251-14, circuit 1828 (PK/LG), harness side and the instrument cluster C220a-32, circuit 1828 (PK/LG), harness side.
  
  Fig 2: Measuring Resistance Between DLC C251-14, Circuit 1828 (PK/LG), Harness Side And Instrument Cluster C220a-32, Circuit 1828 (PK/LG), Harness Side
  Courtesy of FORD MOTOR CO.
- Are the resistances less than 5 ohms?
- Yes : GO to F3.
- No : REPAIR the circuit in question. CONNECT the instrument cluster C220a. REPOWER the air bag system. REFER to SUPPLEMENTAL RESTRAINT SYSTEM . CARRY OUT the data link diagnostics test.
F3 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 INSTRUMENT CLUSTER . REPOWER the air bag system. REFER to SUPPLEMENTAL RESTRAINT SYSTEM . 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 diagnostic trouble codes (DTCs). REPEAT the self-test. CARRY OUT the data link diagnostics test.