Diagnostic Test

WARNING: This page is about a different car, the 2017 Jeep Cherokee. However, it is still accessible from the selected car via links, so may be relevant.

VERIFY THE DTC IS ACTIVE
1. Perform any Service Bulletins that may apply.
2. Ignition on.
3. With the scan tool, read ABS DTCs and record on the repair order.
4. Using the scan tool, read and record Environmental Data.
5. Using the scan tool, erase DTCs.
6. Cycle the ignition from off to on.
7. Press and hold the brake pedal.
8. Push the EPB Switch down to release the Electric Parking Brakes.
9. Pull the EPB Switch up to set the Electric Parking Brakes.
10. Push the EPB Switch down to release the Electric Parking Brakes.
11. Release the brake pedal.
12. Cycle the ignition from off to on.
13. With the scan tool, read EPB DTCs.
  Is the DTC active at this time?
  
  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.
CHECK FOR ELECTRIC PARK BRAKE (EPB) MODULE OR COMMUNICATION RELATED DTCS
1. Refer to the recorded DTCs.
  Are there any EPB Module or Communication related DTCs active or pending?
  
  Yes
  - Perform the appropriate diagnostic procedures before continuing with this test. Refer to DIAGNOSTIC CODE INDEX, ABS .
  No
  - Go To 3
PERFORM THE ASSEMBLY CHECK ROUTINE
1. Ignition on.
2. With the scan tool, perform the Assembly Check routine.
3. With the scan tool, erase the DTCs.
4. Cycle the ignition from off to on.
5. Cycle the ignition from off to on.
6. With the scan tool, read EPB DTCs.
  Does the DTC remain active?
  
  Yes
  - Go To 4
  No
  - Test complete, the condition or conditions that originally set this DTC are not present at this time.
  - Perform the EPB VERIFICATION TEST. Refer to STANDARD PROCEDURE .
CHECK RELATED HARNESS CONNECTIONS
1. Disconnect the EPB 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 EPB Module harness connector. Be certain that the harness connector is fully seated and the connector locks are 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 EPB Module DTCs.
  Did the DTC return?
  
  Yes
  - Replace the Electric Parking Brake (EPB) Module in accordance with Service Information. Refer to MODULE, ELECTRIC PARK BRAKE (EPBM), REMOVAL .
  - Perform the EPB VERIFICATION TEST. Refer to STANDARD PROCEDURE .
  No
  - Test complete.
  - Perform the EPB VERIFICATION TEST. Refer to STANDARD PROCEDURE .