LEMON Manuals: Even more car manuals for everyone
Home >> Jeep >> 2007 >> Wrangler Rubicon, Standard >> Repair and Diagnosis (Single Page) >> Brakes >> Anti-Lock Brakes >> Anti-Lock Brake System - Electrical Diagnostics >> Brakes - Abs Electrical Diagnostics >> DTC Troubleshooting >> U1003-Esp Can C Bus Performance >> Diagnostic Test

Diagnostic Test

  1. 1) VERIFY DTC IS ACTIVE 

    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. 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.
    2. Refer to ABS INTERMITTENT CONDITION .
  2. 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. 3) CHECK THE (D52) DYNAMICS SENSOR HIGH DATA LINK CIRCUIT FOR A SHORT TO VOLTAGE 
    Fig 1: 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  4).
  4. 4) CHECK THE (D52) DYNAMICS SENSOR HIGH DATA LINK CIRCUIT FOR A SHORT TO GROUND 
    Fig 2: 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  5).
  5. 5) CHECK THE (D52) DYNAMICS SENSOR HIGH DATA LINK CIRCUIT FOR AN OPEN 
    Fig 3: Checking Sensor Cluster High Data Link Circuit
    GC0039481Courtesy 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  6).

    No 

    1. Repair the (D52) Dynamics Sensor High Data Link circuit for an open.
    2. Perform ABS VERIFICATION TEST .
  6. 6) CHECK THE (D51) DYNAMICS SENSOR LOW DATA LINK CIRCUIT FOR A SHORT TO VOLTAGE 
    Fig 4: 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  7).
  7. 7) CHECK THE (D51) DYNAMICS SENSOR LOW DATA LINK CIRCUIT FOR A SHORT TO GROUND 
    Fig 5: 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  8).
  8. 8) CHECK THE (D51) DYNAMICS SENSOR LOW DATA LINK CIRCUIT FOR AN OPEN 
    Fig 6: Measuring Resistance Of Dynamics Sensor Low Data Link Circuit
    GC0039482Courtesy 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. Go to  9).

    No 

    1. Repair the (D51) Dynamics Sensor Low Data Link circuit for an open.
    2. Perform ABS VERIFICATION TEST .
  9. 9) REPLACE DYNAMICS SENSOR & VERIFY IF DTC IS STILL ACTIVE 

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

    Turn the ignition on.

    With the scan tool, erase ABS DTCs.

    Cycle the ignition switch.

    WARNING: Ensure brake capability is available before road testing.

    Test drive the vehicle by turning the vehicle left or right in a curving manner at a velocity between 10 and 25 km/h (6 and 15 mph).

    Park the vehicle.

    With the scan tool, read ABS DTCs.

    Does this DTC reset? 

    Yes 

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

    No 

    1. Perform ABS VERIFICATION TEST .
scientia non olet · About LEMON Manuals