Electrical Diagnosis - PCM Verification Test & PCM & ECM Programming: Diagnosis Jeep Compass I

Diagnostic Test

1. SELECT THE PROPER VERIFICATION TEST Select the verification test for the repair that has been completed: Speed Control repair Go To step 2 . Charging System repair Go To step 3 . No Start repair Go To step 4 . All other repairs Go To step 5 .
2. SPEED CONTROL VERIFICATION TEST 1. Inspect the vehicle to verify that all engine components are properly installed and connected. Reassemble and reconnect components as necessary. 2. With the scan tool, erase all diagnostic trouble codes (DTCs). 3. Road test the vehicle at a speed above 60 km/h (35 MPH). 4. Press the Cruise On/Off switch to turn the speed control on. 5. Move the speed control switch to the Set/Decel position. If the speed control does not engage, the repair is not complete, continue with step 12. 6. Move the speed control switch to the Resume/Accel position. If the vehicle speed does not increase by 3 km/h (2 MPH), the repair is not complete, continue with step 12. 7. Using caution, press and release the brake pedal. If the speed control does not disengage, the repair is not complete, continue with step 12. 8. With the vehicle speed at least 60 km/h (35 MPH), move the speed control switch to the Resume/Accel position. If the speed control does not resume at the previously set speed, the repair is not complete, continue with step 12. 9. Move the speed control switch to the Set/Decel position. If the vehicle does not decelerate, the repair is not complete, continue with step 12. 10. Hold the speed control switch in the Set/Decel position and release the switch with the vehicle speed above 60 km/h (35 MPH). If the vehicle speed does not adjust and set a new vehicle speed, the repair is not complete, continue with step 12. 11. With the speed control engaged, press the Cruise On/Off switch. If the speed control does not disengage, the repair is not complete, continue with step 12. 12. If the vehicle did not successfully perform all of the previous steps, check for Technical Service Bulletins (TSBs) that pertain to this speed control problem and then, if necessary, return to the Symptom List. 13. If the vehicle successfully performed all of the previous steps, the speed control system is now functioning as designed. The repair is now complete. Are any DTCs or symptoms remaining? Yes Repair is not complete, refer to the appropriate diagnostic procedure. No Repair is complete.
3. CHARGING SYSTEM VERIFICATION TEST 1. Inspect the vehicle to verify that all engine components are properly installed and connected. Reassemble and reconnect components as necessary. 2. With the scan tool, erase all diagnostic trouble codes (DTCs). 3. Start the engine. 4. Raise the engine speed to 2000 RPM for at least 30 seconds. 5. Allow the engine to idle. 6. Turn the ignition off for 20 seconds. 7. Turn the ignition on. 8. With the scan tool, read PCM DTCs. 9. If this DTC has set again, or another DTC has set, look for any Technical Service Bulletins (TSBs) that may relate to this condition. Return to the Symptom List if necessary. 10. If the charging system is functioning correctly and there are no DTCs, the repair is now complete. Are any DTCs or symptoms remaining? Yes Repair is not complete, refer to the appropriate diagnostic procedure. No Repair is complete.
4. NO START VERIFICATION TEST NOTE: IMPORTANT! If the Powertrain Control Module or Sentry Key Immobilizer Module has been replaced, verify the programming procedure for the module has been performed in accordance with the Service Information. 1. Inspect the vehicle to verify that all engine components are properly installed and connected. Reassemble and reconnect components as necessary. 2. Inspect the engine oil for contamination. If it is contaminated, change the oil and filter. 3. With the scan tool, erase all diagnostic trouble codes (DTCs). 4. Turn the ignition off for at least 10 seconds. 5. Attempt to start the engine. 6. If the engine will not start, refer to any Technical Service Bulletins (TSBs) that may relate to this condition. Return to the Symptom List if necessary. 7. If the engine starts and continues to run, the repair is now complete. Are any DTCs or symptoms remaining? Yes Repair is not complete, refer to the appropriate diagnostic procedure. No Repair is complete.
5. ROAD TEST VERIFICATION TEST 1. Inspect the vehicle to verify that all engine components are properly installed and connected. Reassemble and reconnect components as necessary. 2. If this verification procedure is being performed after a non-DTC test, perform steps 3 and 4. If not, proceed to step 5. 3. Check to see if the initial symptom still exists. If there are no trouble codes and the symptom no longer exists, the repair was successful and testing is now complete. 4. If the initial or another symptom exists, the repair is not complete. Check all pertinent Technical Service Bulletins (TSBs) and return to the Symptom List if necessary. 5. For previously read DTCs that have not been dealt with, return to the Symptom List and follow the diagnostic path for that DTC; otherwise, continue. 6. If the Powertrain Control Module (PCM) has been replaced, continue with step 9. 7. With the scan tool, erase all diagnostic trouble codes (DTCs), then disconnect the scan tool. 8. Turn the ignition off for at least 10 seconds. 9. If equipped with a Transfer Case Position Switch, perform step 10, otherwise, continue with step 11. 10. With the ignition switch on, place the Transfer Case Shift Lever in each gear position, stopping for 15 seconds in each position. 11. Road test the vehicle. For some of the road test, go at least 64 km/h (40 MPH). If this test is for an A/C Control condition, drive the vehicle for at least 5 minutes with the A/C on. 12. At some point, stop the vehicle and turn the engine off for at least 10 seconds, then restart the engine and continue. 13. Upon completion of the road test, turn the engine off and check for DTCs with the scan tool. 14. If the repaired DTC has set again, the repair is not complete. Check for any pertinent Technical Service Bulletins (TSBs) and return to the Symptom List. If there are no DTCs, the repair was successful and is now complete. Are any DTCs or symptoms remaining? Yes Repair is not complete, refer to the appropriate diagnostic procedure. No Repair is complete.

REPAIR PROCEDURE - Using StarMOBILE® STANDALONE Diagnostic Mode

Note. StarMOBILE® STANDALONE Mode is an efficient way to flash ECUs without having direct access to a network connection. It involves first copying the flash file to the StarMOBILE® device which DOES require a network connection. Once the file has been copied to the StarMOBILE® device, it can be used in a STANDALONE mode to flash the ECU WITHOUT a network connection.

Note. StarMOBILE® does not need to be connected to a vehicle when retrieving a flash file for STANDALONE Mode.

Scheme 607

Scheme 608

Scheme 609

Scheme 610

Scheme 611

Scheme 612

1. Power on the StarMOBILE®. Launch the StarMOBILE® Desktop Client and connect to the tool.
2. At the Home screen, select "ECU View" Select "PCM" Select "More Options" Select "ECU Flash" Select "Browse for New File" and follow the on screen instructions. Highlight the appropriate calibration based on the current ECU part number, or by using Year/Model/Engine and appropriate emissions selection for the vehicle being worked on. NOTE: If you are not connected to the vehicle, you may also search for flash files by selecting the "Flash Download" button from the Home screen.
3. From the Flash File List, select the appropriate calibration for the PCM and select "Download to Client"
4. Once the download is complete, hit "OK" and then "Manage Files"
5. In the Manage Files screen, highlight the downloaded flash file and select "Copy to SM Device". A green check mark should now appear in the On SM Device column.
6. Exit the StarMOBILE® Desktop Client application.
7. Open the hood of the vehicle and install a battery charger. Verify that the charging rate provides a continuous charge of 13.2 - 13.5 volts.
8. Connect the StarMOBILE® to the vehicle data link connector located under the steering column and turn the ignition key to the "RUN" position.
9. On the StarMOBILE® device, select "Enter STANDALONE Diagnostic Mode" (use the right function key). NOTE: If a StarMOBILE® Desktop Client is still associated with the device, you will receive the following error: "Your StarMOBILE® device is currently locked by a PC named 'xxxxxxxx' on your network. To remove the lock, close its Desktop Client or reboot this device".
10. Program the ECU as follows: Select "ECU View" Select "PCM" Select "Flash ECU" Record the ECU part number at the very top of the screen for later reference. Highlight the flash file that you want to use. Hit "SELECT" and then "OK". Follow the on screen instructions. Once the flash is complete, verify that the part number at the top of the Flash PCM screen has updated to the new part number. NOTE: If this flash process is interrupted or aborted, the flash should be restarted.
11. Continue to «SECTION 2 - ADDITIONAL PCM / TCM REPLACEMENT PROCEDURES»(ref-304396-S29472166172008110700000) to complete the process if the ECU has been replaced.
12. Type the necessary information on the "Authorized Modification Label" (p/n 04275086AB) and attach near the VECI label (See «SECTION 3 - AUTHORIZED MODIFICATION LABEL»(ref-304396-S15198537082008110700000) for details).

PRE-DIAGNOSTIC TROUBLESHOOTING PROCEDURE

For complete wiring diagrams refer to

SYSTEM WIRING DIAGRAMS for Compass.

SYSTEM WIRING DIAGRAMS for Patriot.

1. NO RESPONSE NOTE: For vehicle communication problems, use the scan tool to refer to the Network Review Screen. The screen depicts a high level view of the vehicle network. Fault and problem areas appear in red. Does the scan tool display a Vehicle Network problem or NO RESPONSE condition? Yes Refer to the appropriate BUS Communication test in «ELECTRONIC CONTROL MODULES - ELECTRICAL DIAGNOSTICS»(ref-304334-S35563214642008110700000) . No Go To step 2 .
2. NO START Does the vehicle have a NO START condition? Yes Check the vehicle for any DTC(s), including Vehicle Theft Security related DTC(s), that may cause a no-start condition. If no DTC(s) are present that relate to a no-start condition, refer to the appropriate Non DTC Diagnostic Procedures that relate to Fuel and Starting. No Go To step 3 .
3. VEHICLE REPAIR HISTORY AND TSB(s) Check the vehicle repair history for repairs that may relate to the current condition. Inspect the vehicle for aftermarket accessories that may have been installed incorrectly. Check for any TSB(s) related to the condition or DTC(s). If a TSB applies, follow the procedure outlined in the TSB. Select the appropriate response for the condition that applies: Performing a TSB procedure repaired the condition. Test Complete. Perform «PCM VERIFICATION TEST»(ref-304396-S07357759032008110700000) . A DTC is present, no TSB applies, or the TSB didn't repair the condition. Go To step 4 . No DTC(s) or conditions are present. Refer to the «*CHECKING FOR AN INTERMITTENT CONDITION»(ref-304395-S28853819902008110700000) Diagnostic Procedure.
4. VEHICLE INSPECTION WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts, or fan. Do not wear loose clothing. Failure to follow these instructions can result in personal injury or death. Based on the diagnostic condition that applies, review the following list and perform any tests that relate to the condition: If multiple DTCs are set in the PCM, review the wiring schematics for problems in any shared supply or ground circuits. Refer to the appropriate diagnostic procedure for Checking the PCM Power and Ground Circuits. Inspect the air intake system and related tubes for damage, restriction, or poor connection. Inspect the exhaust system and related tubes for damage, restriction, or poor connection. Remove and inspect the Air Filter for excessive dirt and debris which may cause an air flow restriction. If the PCM detects and stores a DTC, the PCM also stores the environmental conditions under which the DTC was set. Before erasing stored DTCs, record these conditions. Attempting to duplicate these conditions may assist when checking for an active DTC. With the scan tool, Clear the stored DTC(s). Attempt to duplicate the environmental conditions under which the DTC was set. Review the DTC When Monitored and Set Conditions. If possible, try to duplicate the vehicle conditions under which the DTC conditions will be monitored. Operate the vehicle under those conditions. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the component and the module. If the DTC(s) are fuel or air related, check the fuel level and quality. Were any repairs made that corrected the DTC or condition? Yes Test complete. Perform «PCM VERIFICATION TEST»(ref-304396-S07357759032008110700000) . No Refer to the appropriate diagnostic test procedure related to the DTC.