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Home >> Jeep >> 2016 >> Compass Sport SE, 2.0L Eng VIN A >> Repair and Diagnosis >> Brakes >> Anti-Lock Brakes >> (Antilock Brake System (Abs) - Electrical Diagnostics) >> DTC Troubleshooting >> DTC U1003: -Esp Can C Bus Performance >> Diagnostic Test

Diagnostic Test

  1. CHECK FOR AN ACTIVE DTC 
    1. Turn the ignition on.
    2. With the scan tool, read ABS DTCs and record on the repair order.
    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 ABS DTCs.
    5. Cycle the ignition switch.
    6. With the scan tool, read ABS DTCs.

      Is the DTC active?

      Yes 

      • Go To  2

      No 

      • Test complete. The condition or conditions that originally set this DTC are not present at this time. Using the wiring diagrams as a guide, check all related splices and connectors for signs of water intrusion, corrosion, pushed out or bent terminals, and correct pin tension.
      • Perform the ABS-INTERMITTENT CONDITION TEST. Refer to ABS-INTERMITTENT CONDITION .
  2. INSPECT RELATED WIRING HARNESS, TERMINALS, AND CONNECTORS 
    1. Visually inspect the related wiring harness. Look for any pinched, chafed, pierced, and partially broken wires.
    2. Visually inspect the related wiring harness connectors. Look for broken, bent, pushed out, and corroded terminals.

      Were any problems found?

      Yes 

      No 

      • Go To  3
  3. CHECK THE (G4) DYNAMICS SENSOR SUPPLY CIRCUIT FOR A SHORT TO GROUND 
    1. Turn the ignition off.
    2. Disconnect the ABS Module harness connector.
    3. Disconnect the Dynamics Sensor harness connector.
    4. Measure the resistance of the (G4) Dynamics Sensor Supply circuit between ground and the Dynamics Sensor harness connector.

      Is the resistance below 5.0 ohms?

      Yes 

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

      No 

      • Go To  4
  4. CHECK THE (G4) DYNAMICS SENSOR SUPPLY CIRCUIT FOR AN OPEN OR HIGH RESISTANCE 
    1. Measure the resistance of the (G4) Dynamics Sensor Supply circuit between the Dynamics Sensor harness connector and the ABS Module harness connector.

      Is the resistance below 5.0 ohms?

      Yes 

      • Go To  5

      No 

      • Repair the (G4) Dynamics Sensor Supply circuit for an open or high resistance.
      • Perform ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
  5. CHECK THE (G94) DYNAMICS SENSOR GROUND CIRCUIT FOR A SHORT TO VOLTAGE 
    1. Turn the ignition on.
    2. Measure the voltage of the (G94) Dynamics Sensor Ground circuit.

      Is there any voltage present?

      Yes 

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

      No 

      • Go To  6
  6. CHECK THE (G94) DYNAMICS SENSOR GROUND CIRCUIT FOR AN OPEN OR HIGH RESISTANCE 
    1. Turn the ignition off.
    2. Measure the resistance of the (G94) Dynamics Sensor Ground circuit between the Dynamics Sensor harness connector and the ABS Module harness connector.

      Is the resistance below 5.0 ohms?

      Yes 

      • Go To  7

      No 

      • Repair the (G94) Dynamics Sensor Ground circuit for an open.
      • Perform ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
  7. CHECK THE (D464) DYNAMICS SENSOR LOW DATA LINK CIRCUIT FOR A SHORT TO GROUND 
    1. Measure the resistance of the (D464) Dynamics Sensor Low Data Link circuit between ground and the Dynamics Sensor harness connector.

      Is the resistance below 5.0 ohms?

      Yes 

      • Repair the (D464) Dynamics Sensor Low Data Link circuit for a short to ground.
      • Perform ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .

      No 

      • Go To  8
  8. CHECK THE (D464) DYNAMICS SENSOR LOW DATA LINK CIRCUIT FOR A SHORT TO VOLTAGE 
    1. Turn the ignition on.
    2. Measure the voltage of the (D464) Dynamics Sensor Low Data Link circuit.

      Is there any voltage present?

      Yes 

      • Repair the (D464) Dynamics Sensor Low Data Link circuit for a short to voltage.
      • Perform ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .

      No 

      • Go To  9
  9. CHECK THE (D464) DYNAMICS SENSOR LOW DATA LINK CIRCUIT FOR AN OPEN OR HIGH RESISTANCE 
    1. Turn the ignition off.
    2. Measure the resistance of the (D464) Dynamics Sensor Low Data Link circuit between the Dynamics Sensor harness connector and the Anti-lock Brake System (ABS) Module harness connector.

      Is the resistance below 5.0 ohms?

      Yes 

      • Go To  10

      No 

      • Repair the (D464) Dynamics Sensor Low Data Link circuit for an open.
      • Perform ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
  10. CHECK THE (D465) DYNAMICS SENSOR HIGH DATA LINK CIRCUIT FOR A SHORT TO GROUND 
    1. Measure the resistance of the (D465) Dynamics Sensor High Data Link circuit between ground and the Dynamics Sensor harness connector.

      Is the resistance below 5.0 ohms?

      Yes 

      • Repair the (D465) Dynamics Sensor High Data Link circuit for a short to ground.
      • Perform ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .

      No 

      • Go To  11
  11. CHECK THE (D465) DYNAMICS SENSOR HIGH DATA LINK CIRCUIT FOR A SHORT TO VOLTAGE 
    1. Turn the ignition on.
    2. Measure the voltage of the (D465) Dynamics Sensor High Data Link circuit.

      Is there any voltage present?

      Yes 

      • Repair the (D465) Dynamics Sensor High Data Link circuit for a short to voltage.
      • Perform ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .

      No 

      • Go To  12
  12. CHECK THE (D465) DYNAMICS SENSOR HIGH DATA LINK CIRCUIT FOR AN OPEN OR HIGH RESISTANCE 
    1. Turn the ignition off
    2. Measure the resistance of the (D465) Dynamics Sensor High Data Link circuit between the Dynamics Sensor harness connector and the Anti-lock Brake System (ABS) Module harness connector.

      Is the resistance below 5.0 ohms?

      Yes 

      • Go To  13

      No 

      • Repair the (D465) Dynamics Sensor High Data Link circuit for an open.
      • Perform ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
  13. DYNAMICS SENSOR 
    1. Replace the Dynamics Sensor in accordance with the Service Information. Refer to SENSOR, DYNAMICS, REMOVAL . Perform ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
    2. Turn the ignition on.
    3. With the scan tool, erase ABS DTCs.
    4. Cycle the ignition switch.
      WARNING:

      Make sure brake capability is available before road testing.

    5. Test drive the vehicle by turning the vehicle left or right in a curving manner at a velocity between 6 and 15 mph (10 and 25 km/h).
    6. Park the vehicle.
    7. With the scan tool, read ABS DTCs.

      Does the DTC remain active?

      Yes 

      No 

      • Test complete.
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