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.

READ AND RECORD DTCS AND ENVIRONMENTAL DATA - ERASE DTCS AND CHECK FOR THE DTC TO RETURN
1. With the scan tool, read DTCs in all Electronic Control Units (ECUs) and record on the repair order.
2. For future reference, with the scan tool, run and save a vehicle Scan Report and all related recorded data.
3. With the scan tool, erase all DTCs.
4. Turn the ignition off for a minimum of 10.0 seconds.
5. Turn the ignition on.
6. Using the When Monitored and Set Conditions above and recorded data, operate the vehicle in the conditions that set the DTC.
7. With the scan tool, read DTCs.
- Go To 2
No
- Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT CONDITION .
NOTE:
When this DTC is Active the engine speed, torque and vehicle speed are limited to a Limp in mode. Diagnose and repair any other DTCs set in the PCM before proceeding with this test. An intermittent loss of power to the PCM without performing an ETC RELEARN procedure may cause this DTC to set. Verify that the PCM is at the latest calibration (flash level). If necessary, update the PCM in accordance with the Service Information.
CHECK THE POWERTRAIN CONTROL MODULE SOFTWARE LEVEL
1. Turn the ignition on.
2. Verify the PCM is at the latest calibration (flash level).
3. Perform any Service Bulletins or PCM flash updates that may apply.
  Is there an update for the PCM software?
  
  Yes
  - Go To 3
  No
  - Go To 4
PROGRAM THE POWERTRAIN CONTROL MODULE
1. Update the PCM in accordance with the Service Information. Refer to MODULE, POWERTRAIN CONTROL (PCM), MODULE PROGRAMMING .
2. Cycle the ignition off and on.
3. With a scan tool, read DTCs.
  Did the DTC return?
  
  Yes
  - Go To 4
  No
  - Updating the PCM software repaired the fault.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST, 2.4L .
INSPECT THE THROTTLE BODY FOR FOREIGN MATERIAL, SCORING OR OTHER DAMAGE THAT COULD CAUSE THE THROTTLE PLATE TO STICK
1. Turn the ignition off.
2. Remove the Air Cleaner Assembly from the Throttle Body. Refer to BODY, AIR CLEANER, REMOVAL .
3. Check for any signs of a foreign material (ice or dirt) causing the Throttle to stick.
  Were any problems found?
  
  Yes
  - Remove the debris if possible or replace the Throttle Body Assembly if signs of physical damage are present. Refer to THROTTLE BODY, REMOVAL . Disconnect the Battery when replacing the Throttle Body Assembly. After installation is complete, use a scan tool and select the ETC RELEARN function.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST, 2.4L .
  No
  - Go To 5
CHECK THE THROTTLE BODY HARNESS CONNECTOR FOR DAMAGE OR POOR FIT
1. Disconnect the Throttle Body harness connector.
2. Check the connector for a damaged locking tab and for corroded, pushed out, spread or damaged terminals that can cause an intermittent connection.
  NOTE:
  An intermittent loss of a signal from one of the sensors may cause this DTC to set without setting a sensor fault.
  
  Were any problems found?
  
  Yes
  - Repair the Throttle Body connector or wiring.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST, 2.4L .
  No
  - Go To 6
REPLACE THE THROTTLE BODY AND RETEST FOR DTC
1. Replace the Throttle Body in accordance with the Service Information. Refer to THROTTLE BODY, REMOVAL .
2. Connect the Throttle Body and PCM harness connectors.
3. Turn the ignition on.
4. With the scan tool, erase DTCs.
5. Using the recorded Freeze Frame and the When Monitored conditions, operate the vehicle in the conditions that set the DTC.
6. With the scan tool, read DTCs.
  Did the DTC return?
  
  Yes
  - Go To 7
  No
  - Replacing the Throttle Body repaired the fault.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST, 2.4L .
CHECK RELATED HARNESS CONNECTIONS
1. Disconnect all PCM harness connectors.
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.
  - Check for spread terminals and verify proper terminal tension.
  Repair any conditions that are found.
5. Connect all PCM harness connectors. Be certain that all harness connectors are 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 all 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. Test drive or operate the vehicle in accordance with the when monitored and set conditions.
10. With the scan tool, read DTCs.
  Did the DTC return?
  
  Yes
  - Replace and program the Powertrain Control Module (PCM) in accordance with the Service Information. Refer to MODULE, POWERTRAIN CONTROL (PCM), REMOVAL, 2.4L/3.2L .
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST, 2.4L .
  No
  - The wiring or poor connection problem has been repaired.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST, 2.4L .