LEMON Manuals: Even more car manuals for everyone
Home >> Mercury >> 2009 >> Sable Base, AWD >> Repair and Diagnosis (Single Page) >> External Pages >> Different car >> Section 1667 (Module Communications Network) >> Diagnostic Tests >> Communications Network >> Pinpoint Tests >> Pinpoint Test C: The Instrument Cluster (IC) Does Not Respond To The Scan Tool >> Pinpoint Test C: The Instrument Cluster (Ic) Does Not Respond To The Scan Tool

Pinpoint Test C: The Instrument Cluster (Ic) Does Not Respond To The Scan Tool

WARNING: This page is about a different car, the 2010 Lincoln Town Car. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
  1. C1 CHECK THE HS-CAN TERMINATION RESISTANCE 
    • Key in OFF position.
      • NOTE: Failure to disconnect the battery will result in false resistance readings.
    • Disconnect the battery ground cable.
    • Disconnect the scan tool cable from the data link connector (DLC).
    • Measure the resistance between the DLC C251-6, circuit 1827 (WH/LG), harness side and the DLC C251-14, circuit 1828 (PK/LG), harness side.
      • Fig 1: Measuring Resistance
      GF0004695Courtesy of FORD MOTOR CO.
    • Is the resistance between 54 and 66 ohms? 
    1. YES  : Go to  C2.
    2. NO  : Go to  C4.
  2. C2 CHECK THE IC VOLTAGE SUPPLY CIRCUITS FOR AN OPEN 
    • Disconnect: IC C220
    • Connect the battery ground cable.
    • Key in ON position.
    • Measure the voltage between the IC, harness side and ground as follows:
      Connector-Pin Circuit
      C220-1 1566 (RD/YE)
      C220-17 1003 (GY/YE)
      C220-19 640 (RD/YE)
    • Are the voltages greater than 10 volts? 
    1. YES  : Go to  C3.
    2. NO  : VERIFY the central junction box (CJB) fuses 8 (10A), 13 (10A) and 25 (10A) are OK. If OK, REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
  3. C3 CHECK THE IC GROUND CIRCUITS FOR AN OPEN 
    • Key in OFF position.
    • Measure the resistance between the IC, harness side and ground as follows:
      Connector-Pin Circuit
      C220-2 676 (PK/OG)
      C220-18 57 (BK)
    • Are the resistances less than 5 ohms? 
    1. YES  : Go to  C5.
    2. NO  : REPAIR the circuit in question. CLEAR the DTCs. REPEAT the network test with the scan tool.
  4. C4 CHECK THE CAN CIRCUITS BETWEEN THE IC AND THE DLC FOR AN OPEN 
    • Disconnect: IC C220
    • Measure the resistance between the IC C220-30, circuit 1827 (WH/LG), harness side and the DLC C251-6, circuit 1827 (WH/LG), harness side.
      • Fig 2: Checking Circuit For Open
      GF0014634Courtesy of FORD MOTOR CO.
    • Measure the resistance between the IC C220-31, circuit 1828 (PK/LG), harness side and the DLC C251-14, circuit 1828 (PK/LG), harness side.
      • Fig 3: Checking Circuit For Open
      GF0014635Courtesy of FORD MOTOR CO.
    • Are the resistances less than 5 ohms? 
    1. YES  : CONNECT the battery. Go to  C5.
    2. NO  : REPAIR the circuit in question. CONNECT the battery. CLEAR the DTCs. REPEAT the network test with the scan tool.
  5. C5 CHECK FOR CORRECT IC OPERATION 
    • Disconnect the IC connector.
    • Check for:
      • corrosion
      • damaged pins
      • pushed-out pins
    • Connect the IC connector and make sure it seats correctly.
    • Operate the system and verify the concern is still present.
    • Is the concern still present? 
    1. YES  : INSTALL a new IC. REFER to INSTRUMENTATION, MESSAGE CENTER, AND WARNING CHIMES article. CLEAR the DTCs. REPEAT the network test with the scan tool.
    2. 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 network test with the scan tool.
scientia non olet · About LEMON Manuals