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Home >> Chrysler >> 2009 >> 300 Signature Series >> Repair and Diagnosis >> External Pages >> Different car >> Section 237 (Anti-Lock Brake System & Adjustable Pedals - Electrical Diagnostics) >> Electrical Diagnostics >> Abs >> DTC Troubleshooting >> U0125-Lost Communication With Dynamics Sensor >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2008 Dodge Magnum, 2008 Dodge Charger, and 2008 Chrysler 300. However, it is still accessible from the selected car via links, so may be relevant.
  1. VERIFY DTC IS ACTIVE 
    NOTE: If present, diagnose and repair DTC C2114-DYNAMICS SENSOR SUPPLY VOLTAGE LOW  or DTC C2115-DYNAMICS SENSOR SUPPLY VOLTAGE HIGH  before proceeding.

    Turn the ignition on.

    With the scan tool, read and record ABS DTCs.

    With the scan tool, read and record Environmental Data (EV Data).

    With the scan tool, erase ABS DTCs.

    Cycle the ignition switch.

    With the scan tool, read ABS DTCs.

    Does this DTC reset? 

    Yes 

    1. Go To  2.

    No 

    1. Refer to the ABS INTERMITTENT CONDITION  diagnostic procedure.
  2. INSPECT RELATED WIRING HARNESS, TERMINALS, & CONNECTORS 

    Visually inspect the related wiring harness. Look for any pinched, chafed, pierced, and partially broken wires.

    Visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, and corroded terminals.

    Were any problems found? 

    Yes 

    1. Repair as necessary.
    2. Perform ABS VERIFICATION TEST .

    No 

    1. Go To  3.
  3. CHECK THE VOLTAGE ON THE (G4) DYNAMICS SENSOR SUPPLY CIRCUIT 
    Fig 1: Checking Sensor Cluster Supply Circuit For Short To Voltage
    GC0026979Courtesy of CHRYSLER LLC

    Turn the ignition off.

    Disconnect the Dynamics Sensor harness connector.

    Turn the ignition on.

    Measure the voltage of the (G4) Dynamics Sensor Supply Circuit.

    Is the voltage above 10 volts? 

    Yes 

    1. Go To  7.

    No 

    1. Go To  4.
  4. (G4) DYNAMICS SENSOR SUPPLY CIRCUIT SHORT TO GROUND 
    Fig 2: Checking Sensor Cluster Supply Circuit
    GC0026980Courtesy of CHRYSLER LLC

    Turn the ignition off.

    Disconnect the Anti-Lock Brake Module harness connector.

    Measure the resistance between ground and the (G4) Dynamics Sensor Supply circuit.

    Is the resistance below 5.0 ohms? 

    Yes 

    1. Repair the (G4) Dynamics Sensor Supply circuit for a short to ground.
    2. Perform ABS VERIFICATION TEST .

    No 

    1. Go To  5.
  5. (G4) DYNAMICS SENSOR SUPPLY CIRCUIT SHORT TO VOLTAGE 
    Fig 3: Checking Sensor Cluster Supply Circuit For Short To Voltage
    GC0026979Courtesy of CHRYSLER LLC

    Turn the ignition on.

    Measure the voltage of the (G4) Dynamics Sensor Supply circuit.

    Is there any voltage present? 

    Yes 

    1. Repair the (G4) Dynamics Sensor Supply circuit for a short to voltage.
    2. Perform ABS VERIFICATION TEST .

    No 

    1. Go To  6.
  6. (G4) DYNAMICS SENSOR SUPPLY CIRCUIT OPEN 

    Turn the ignition off.

    Measure the resistance of the (G4) Dynamics Sensor Supply circuit.

    Is the resistance below 5.0 ohms? 

    Yes 

    1. Replace the Anti-Lock Brake Module in accordance with the Service Information.
    2. Perform ABS VERIFICATION TEST .

    No 

    1. Repair the (G4) Dynamics Sensor Supply circuit for an open.
    2. Perform ABS VERIFICATION TEST .
  7. CHECK THE RESISTANCE BETWEEN THE (G94) DYNAMICS SENSOR GROUND CIRCUIT AND GROUND 
    Fig 4: Measuring Resistance Between (G94) Dynamics Sensor Ground Circuit & Ground
    GC0044712Courtesy of CHRYSLER LLC

    Disconnect the Dynamics Sensor harness connector.

    Measure the resistance between the (G94) Dynamics Sensor Ground Circuit and Ground.

    Is the resistance below 5.0 ohm? 

    Yes 

    1. Go To  10.

    No 

    1. Go To  8.
  8. (G94) DYNAMICS SENSOR GROUND CIRCUIT SHORT TO VOLTAGE 
    Fig 5: Checking Sensor Cluster Ground Circuit
    GC0026983Courtesy of CHRYSLER LLC

    Turn the ignition off.

    Disconnect the Anti-Lock Brake Module harness connector.

    Turn the ignition on.

    Measure the voltage of the (G94) Dynamics Sensor Ground circuit.

    Is there any voltage present? 

    Yes 

    1. Repair the (G94) Dynamics Sensor Ground circuit for a short to voltage.
    2. Perform ABS VERIFICATION TEST .

    No 

    1. Go To  9.
  9. (G94) DYNAMICS SENSOR GROUND CIRCUIT OPEN 

    Turn the ignition off.

    Measure the resistance of the (G94) Dynamics Sensor Return circuit.

    Is the resistance below 5.0 ohms? 

    Yes 

    1. Replace the Anti-Lock Brake Module in accordance with the Service Information.
    2. Perform ABS VERIFICATION TEST .

    No 

    1. Repair the (G94) Dynamics Sensor Ground circuit for an open.
    2. Perform ABS VERIFICATION TEST .
  10. CHECK THE DYNAMICS SENSOR OUTPUT 
    CAUTION: All previously removed connectors must be connected before test driving the vehicle.
    CAUTION: Ensure brake capability is available before road testing.

    Have an assistant test drive the vehicle while monitoring the Dynamics Sensor operation.

    Was the Lateral Sensor output between 0.02 G to 0.16 G and the Yaw Sensor between 1.30° to 5.70° 

    Yes 

    1. Replace the Anti-Lock Brake Module in accordance with the Service Information.
    2. Perform ABS VERIFICATION TEST .

    No 

    1. Go To  11.
  11. CHECK THE (D52) DYNAMICS SENSOR HIGH DATA LINK CIRCUIT FOR A SHORT TO VOLTAGE 
    Fig 6: Checking Dynamics Sensor High Data Link Circuit For Short To Voltage
    GC0026985Courtesy of CHRYSLER LLC

    Disconnect the Anti-Lock Brakes Module harness connector.

    Disconnect the Dynamics Sensor harness connector.

    Turn the ignition on.

    Measure the voltage of the (D52) Dynamics Sensor High Data Link circuit.

    Is there any voltage present? 

    Yes 

    1. Repair the (D52) Dynamics Sensor High Data Link circuit for a short to voltage.
    2. Perform ABS VERIFICATION TEST .

    No 

    1. Go To  12.
  12. CHECK THE (D52) DYNAMICS SENSOR HIGH DATA LINK CIRCUIT FOR A SHORT TO GROUND 
    Fig 7: Checking Dynamics Sensor High Data Link Circuit For Short To Ground
    GC0026986Courtesy of CHRYSLER LLC

    Turn the ignition off.

    Measure the resistance of the (D52) Dynamics Sensor High Data Link circuit between ground and the Dynamics Sensor harness connector.

    Is the resistance below 5.0 ohms? 

    Yes 

    1. Repair the (D52) Dynamics Sensor High Data Link circuit for a short to ground.
    2. Perform ABS VERIFICATION TEST .

    No 

    1. Go To  13.
  13. CHECK THE (D52) DYNAMICS SENSOR HIGH DATA LINK CIRCUIT FOR AN OPEN 
    Fig 8: Checking Dynamics Sensor High Data Link Circuit For Open
    GC0039483Courtesy of CHRYSLER LLC

    Measure the resistance of the (D52) Dynamics Sensor High Data Link circuit between the Dynamics Sensor harness connector and the Anti-Lock Brakes Module harness connector.

    Is the resistance below 5.0 ohms? 

    Yes 

    1. Go To  14.

    No 

    1. Repair the (D52) Dynamics Sensor High Data Link circuit for an open.
    2. Perform ABS VERIFICATION TEST .
  14. CHECK THE (D51) DYNAMICS SENSOR LOW DATA LINK CIRCUIT FOR A SHORT TO VOLTAGE 
    Fig 9: Checking Dynamics Sensor Low Data Link Circuit For Short To Voltage
    GC0026988Courtesy of CHRYSLER LLC

    Turn the ignition on.

    Measure the voltage of the (D51) Dynamics Sensor Low Data Link circuit.

    Is there any voltage present? 

    Yes 

    1. Repair the (D51) Dynamics Sensor Low Data Link circuit for a short to voltage.
    2. Perform ABS VERIFICATION TEST .

    No 

    1. Go To  15.
  15. CHECK THE (D51) DYNAMICS SENSOR LOW DATA LINK CIRCUIT FOR A SHORT TO GROUND 
    Fig 10: Checking Dynamics Sensor Low Data Link Circuit For Short To Ground
    GC0026989Courtesy of CHRYSLER LLC

    Turn the ignition off.

    Measure the resistance of the (D51) Dynamics Sensor Low Data Link circuit between ground and the Dynamics Sensor harness connector.

    Is the resistance below 5.0 ohms? 

    Yes 

    1. Repair the (D51) Dynamics Sensor Low Data Link circuit for a short to ground.
    2. Perform ABS VERIFICATION TEST .

    No 

    1. Go To  16.
  16. CHECK THE (D51) DYNAMICS SENSOR LOW DATA LINK CIRCUIT FOR AN OPEN 
    Fig 11: Checking Dynamics Sensor Low Data Link Circuit For Open
    GC0039484Courtesy of CHRYSLER LLC

    Measure the resistance of the (D51) Dynamics Sensor Low Data Link circuit between the Dynamics Sensor harness connector and the Anti-Lock Brakes Module harness connector.

    Is the resistance below 5.0 ohms? 

    Yes 

    1. Replace the Dynamics Sensor in accordance with the Service Information.
    2. Perform ABS VERIFICATION TEST .

    No 

    1. Repair the (D51) Dynamics Sensor Low Data Link circuit for an open.
    2. Perform ABS VERIFICATION TEST .
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