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Home >> Jeep >> 2008 >> Compass Limited, AWD, Standard >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Communication Devices >> Electronic Control Modules - Electrical Diagnostics >> Electronic Control Modules - Electrical Diagnostics >> DTC Troubleshooting >> U0126-Lost Communication With Steering Angle Sensor (SAS) >> Diagnostic Test
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Diagnostic Test

  1. VERIFY DTC IS ACTIVE 
    NOTE: Ensure the IOD fuse is installed and battery voltage is between 10 and 16 volts before proceeding.
    NOTE: Check for any TSB(s) related to the condition. If a TSB applies, perform the procedure outlined in the TSB before continuing.

    Turn the ignition on.

    With the scan tool, read active DTC's.

    Is this DTC active? 

    Yes 

    1. Go To  2.

    No 

    1. Perform the *STORED LOST COMMUNICATION DTCS  test procedure.
  2. CHECK FOR ANY OF THE FOLLOWING ACTIVE DTC'S 

    With the scan tool, read all active DTC's from all CAN C Bus modules.

    NOTE: Check for CAN C hardware electrical, VIN Missing/Mismatch, battery or ignition related DTC's.

    Does the scan tool display any active DTC's to the conditions listed above? 

    Yes 

    1. Diagnose and repair the DTC. Refer to the DIAGNOSTIC CODE INDEX  for a complete list of the symptoms.

    No 

    1. Go To  3.
  3. VERIFY THAT THE SAS IS ACTIVE ON THE BUS 

    With the scan tool, select ECU View.

    Verify that the SAS is active on the bus.

    Is the SAS active on the bus? 

    Yes 

    1. Go To  4.

    No 

    1. Perform the appropriate NO RESPONSE diagnostic procedure. See DIAGNOSIS AND TESTING .
  4. CHECK FOR ADDITIONAL COMMUNICATION RELATED DTC'S 

    With the scan tool, select Network View and select Advanced.

    Is there more than one module with active DTC's "Logged Against" the SAS? 

    Yes 

    1. Replace/update the Steering Angle Sensor (internal to the clockspring) in accordance with the service information.
    2. Perform BODY VERIFICATION TEST - VER 1 .

    No 

    1. Replace/update the module that set this DTC in accordance with the service information
    2. Perform BODY VERIFICATION TEST - VER 1 .