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Home >> Jeep >> 2016 >> Compass Sport SE, 2.0L Eng VIN A >> Repair and Diagnosis >> Brakes >> Traction Control >> (Antilock Brake System (Abs) - Electrical Diagnostics) >> DTC Troubleshooting >> DTC U0126: -Lost Communication With Steering Angle Sensor >> Diagnostic Test

Diagnostic Test

  1. VERIFY DTC IS ACTIVE 
    NOTE:

    Make sure the IOD fuse is installed and battery voltage is between 10 and 16 volts before proceeding.

    1. Turn the ignition on.
    2. With the scan tool, read and record the ABS DTCs.
    3. With the scan tool, read and record Environmental Data to help identify the conditions in which the DTC was set.
    4. With the scan tool, erase the ABS DTCs.
    5. Cycle the ignition switch.
    6. With the scan tool, read the ABS DTCs.

      Does this DTC reset?

      Yes 

      • Go To  2

      No 

      • The condition that caused the symptom is currently not present. Inspect the related wiring for a possible intermittent condition. Look for any chafed, pierced, pinched, or partially broken wires.
      • Perform the ABS INTERMITTENT CONDITION TEST. Refer to ABS-INTERMITTENT CONDITION .
  2. CHECK FOR ANY OF THE FOLLOWING ACTIVE DTCs 
    1. With the scan tool, read all active DTCs from all CAN C Bus modules.
      NOTE:

      Check for CAN C hardware electrical, VIN Missing/Mismatch, battery or ignition related DTCs.

      Does the scan tool display any active DTCs related to the conditions listed above?

      Yes 

      No 

      • Go To  3
  3. CHECK THE VOLTAGE ON THE (F202) IGNITION SWITCH OUTPUT CIRCUIT 
    Fig 1: Measuring Voltage Of Fused B(+) Circuit In Clockspring C3 Harness Connector
    GC0099400Courtesy of CHRYSLER GROUP, LLC
    1. Turn the ignition off.
    2. Disconnect the Steering Angle Sensor harness connector.
    3. Turn the ignition on.
    4. Measure the voltage of the (F202) Ignition Switch Output circuit.

      Is the voltage above 10 volts?

      Yes 

      • Go To  4

      No 

      • Repair the (F202) Ignition Switch Output circuit for an open.
      • Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
  4. CHECK THE RESISTANCE OF THE (Z937) GROUND CIRCUIT 
    Fig 2: Measuring Resistance Between Ground & Ground Circuit In Clockspring C3 Harness Connector
    GC0099401Courtesy of CHRYSLER GROUP, LLC
    1. Turn the ignition off.
    2. Measure the resistance between the (Z937) Ground circuit and ground.

      Is the resistance below 5.0 Ohms?

      Yes 

      • Go To  5

      No 

      • Repair the (Z937) Ground circuit for an open.
      • Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
  5. VERIFY THAT THE STEERING ANGLE SENSOR IS ACTIVE ON THE BUS 
    1. With the scan tool, select ECU View.
    2. Verify that the Steering Angle Sensor is active on the bus.

      Is the Steering Angle Sensor active on the bus?

      Yes 

      • Replace the Steering Angle Sensor in accordance with the service information.
      • Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .

      No