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Pinpoint Test F: The Satellite Digital Audio Receiver System (SDARS) Module Does Not Respond To The Scan Tool

WARNING: This page is about a different car, the 2009 Ford Mustang. 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. F1 CHECK THE SDARS MODULE VOLTAGE SUPPLY CIRCUIT FOR AN OPEN 
    • Key in OFF position.
    • Disconnect: SDARS Module C4344
      • Fig 1: Checking SDARS Module Voltage Supply Circuit For An Open
      GF0018311Courtesy of FORD MOTOR CO.
    • Measure the voltage between the SDARS module C4344-9, circuit 729 (RD/WH), harness side and ground.
    • Is the voltage greater than 10 volts? 
    1. YES  : Go to  F2.
    2. NO  : VERIFY the bussed electrical center (BEC) fuse 56 (20A) is OK. If OK, REPAIR the circuit in question. If not OK, REFER to the appropriate SYSTEM WIRING DIAGRAMS to IDENTIFY the possible causes of the short circuit. CLEAR the DTCs. REPEAT the network test with the scan tool.
  2. F2 CHECK THE SDARS MODULE GROUND CIRCUIT FOR AN OPEN 
      Fig 2: Checking SDARS Module Ground Circuit For An Open
      GF0018312Courtesy of FORD MOTOR CO.
    • Measure the resistance between the SDARS module C4344-3, circuit 1204 (BK/OG), harness side and ground.
    • Is the resistance less than 5 ohms? 
    1. YES  : Go to  F3.
    2. NO  : REPAIR the circuit. CLEAR the DTCs. REPEAT the network test with the scan tool.
  3. F3 CHECK THE MS-CAN CIRCUITS BETWEEN THE SDARS MODULE AND THE DATA LINK CONNECTOR (DLC) FOR AN OPEN 
      Fig 3: Measuring Resistance Between SDARS Module C4344-1, Circuit 1847 (WH/OG), Harness Side & DLC C251-3
      GF0018313Courtesy of FORD MOTOR CO.
    • Measure the resistance between the SDARS module C4344-1, circuit 1847 (WH/OG), harness side and the DLC C251-3, circuit 1847 (WH/OG), harness side.
      • Fig 4: Measuring Resistance Between SDARS Module C4344-7, Circuit 1848 (PK/OG), Harness Side & DLC C251-11
      GF0018314Courtesy of FORD MOTOR CO.
    • Measure the resistance between the SDARS module C4344-7, circuit 1848 (PK/OG), harness side and the DLC C251-11, circuit 1848 (PK/OG), harness side.
    • Are the resistances less than 5 ohms? 
    1. YES  : Go to  F4.
    2. NO  : REPAIR the circuit. CLEAR the DTCs. REPEAT the network test with the scan tool.
  4. F4 CHECK FOR CORRECT SDARS MODULE OPERATION 
    • Disconnect the SDARS module connector.
    • Check for:
      • corrosion
      • damaged pins
      • pushed-out pins
    • Connect the SDARS module connector and make sure it seats correctly.
    • Repeat the network test.
    • Does the module still fail to communicate to the scan tool? 
    1. YES  : INSTALL a new SDARS module. REFER to INFORMATION AND ENTERTAINMENT SYSTEMS . 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.
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