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Home >> Jeep >> 2019 >> Renegade High Altitude, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1372 (Antilock Brake System (Abs) - DTCS C1261-55 To U19A5-83) >> DTC Troubleshooting >> C1405-13-Electric Park Brake Motor Left - Circuit Open >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different car, the 2020 Jeep Renegade. However, it is still accessible from the selected car via links, so may be relevant.
  1. CHECK FOR AN ACTIVE DTC 
    NOTE:

    If any other DTCs are present, repair them first before continuing with this diagnostic procedure.

    1. Perform any Service Bulletins that may apply.
    2. Turn the ignition on.
    3. With the scan tool, read ABS DTCs and record on the repair order.
    4. Cycle the ignition from off to on.
    5. Press and hold the brake pedal.
    6. Push the EPB Switch down to release the Electric Parking Brakes.
    7. Pull the EPB Switch up to set the Electric Parking Brakes.
    8. Push the EPB Switch down to release the Electric Parking Brakes.
    9. Release the brake pedal.
    10. Cycle the ignition from off to on.
    11. With the scan tool, read ABS DTCs.

      Did the DTC return?

      Yes 

      • Go To  2

      No 

      • 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 and repair as necessary. If no problems are found, test complete.
      • Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
  2. CHECK HARNESS CONNECTORS FOR IMPROPER INSTALLATION, DAMAGE OR ELECTRICAL FAILURE 
    NOTE:

    Check all terminals for broken, bent, pushed out, or corroded terminals.

    1. Turn the ignition off.
    2. Inspect the EPB Left Rear Actuator for proper mounting.
    3. Inspect the EPB Left Rear Actuator for correct mechanical operation.
    4. Inspect the EPB Left Rear Actuator harness and connector.
    5. Inspect the ABS Module harness and connector.

      Were any problems found?

      Yes 

      No 

      • Go To  3
  3. (B63) LEFT REAR EPB ACTUATOR CONTROL A CIRCUIT OPEN OR HIGH RESISTANCE 
    1. Turn the ignition off.
    2. Disconnect the Left Rear EPB Actuator harness connector.
    3. Disconnect the ABS Module harness connector.
    4. Measure the resistance of the (B63) Left Rear EPB Actuator Control A circuit between the Left Rear EPB Actuator harness connector and the ABS Module harness connector.

      Is the resistance below 3.0 Ohms?

      Yes 

      • Go To  4

      No 

      • Repair the (B63) Left Rear EPB Actuator Control A circuit for an open or high resistance.
      • Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
  4. (B65) LEFT REAR EPB ACTUATOR CONTROL B CIRCUIT OPEN OR HIGH RESISTANCE 
    1. Measure the resistance of the (B65) Left Rear EPB Actuator Control B circuit between the Left Rear EPB Actuator harness connector and the ABS Module harness connector.

      Is the resistance below 3.0 Ohms?

      Yes 

      • Go To  5

      No 

      • Repair the (B65) Left Rear EPB Actuator Control B circuit for an open or high resistance.
      • Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
  5. ELECTRIC PARKING BRAKE (EPB) ACTUATOR 
    1. Replace the Electric Parking Brake (EPB) Actuator in accordance with the Service Information. Refer to ACTUATOR, ELECTRIC PARK BRAKE, REMOVAL AND INSTALLATION .
    2. Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST .
    3. Turn the ignition on.
    4. With the scan tool, read ABS DTCs.
    5. Cycle the ignition from off to on.
    6. Press and hold the brake pedal.
    7. Push the EPB Switch down to release the Electric Parking Brakes.
    8. Pull the EPB Switch up to set the Electric Parking Brakes.
    9. Push the EPB Switch down to release the Electric Parking Brakes.
    10. Release the brake pedal.
    11. Cycle the ignition from off to on.
    12. With the scan tool, read ABS DTCs.

      Does the DTC remain active?

      Yes 

      • Go To  6

      No 

  6. CHECK RELATED HARNESS CONNECTIONS 
    1. Disconnect the ABS Module harness connector.
    2. Disconnect all related in-line harness connections (if equipped).
    3. Disconnect the related component harness connectors.
    4. Inspect harness connectors, component connectors, and all male and female terminals for the following conditions:
      • Proper connector installation.
      • Damaged connector locks.
      • Corrosion.
      • Other signs of water intrusion.
      • Weather seal damage (if equipped).
      • Bent terminals.
      • Overheating due to a poor connection (terminal may be discolored due to excessive current draw).
      • Terminals that have been pushed back into the connector cavity.
      • Perform a terminal drag test on each connector terminal to verify proper terminal tension.

      Repair any conditions that are found.

    5. Connect the ABS Module harness connector. Be certain that the harness connector is fully seated and the connector lock is fully engaged.
    6. Connect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
    7. Connect the related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged.
    8. With the scan tool, erase DTCs.
    9. Using the recorded Event and Environmental Data, along with the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
    10. With the scan tool, read ABS Module DTCs.

      Did the DTC return?

      Yes 

      No 

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