Home ReviewsRefund Car not listed?
Home/Jeep/Compass/Jeep Compass I (2006-2010)/Repair manual/Communication Devices/Electronic Control Modules - Service Information: Diagnosis
Contents Wiring diagrams Section: Communication Devices All sections

Electronic Control Modules - Service Information: Diagnosis Jeep Compass I

Communication Devices 6 illustrations ~1246 words

DIAGNOSTIC TROUBLE CODES

Each diagnostic trouble code (DTC) is diagnosed by following a specific procedure. The diagnostic test procedure contains step-by-step instruction for determining the cause of the DTC as well as no trouble code problems. Refer to the appropriate diesel Engine ELECTRONIC DIAGNOSTICS article for more information.

ECM DIAGNOSTIC TROUBLE CODES

Note. Before replacing the ECM for a failed driver, control circuit or ground circuit, be sure to check the related component/circuit integrity for failures not detected due to a double fault in the circuit. Most ECM driver/control circuit failures are caused by internal failures to components (i.e. relays and solenoids) and shorted circuits (i.e. sensor pull-ups, drivers and ground circuits). These faults are difficult to detect when a double fault has occurred and only one DTC has set. If the scan tool displays faults for multiple components (i.e. VSS, ECT, Batt Temp, etc.) identify and check the shared circuits for possible problems before continuing (i.e. sensor grounds or 5-volt supply circuits). Refer to the appropriate SYSTEM WIRING DIAGRAMS article to identify shared circuits. Refer to the appropriate diesel engine ELECTRONIC DIAGNOSTICS article for more information.

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 112

Scheme 112: REPAIR PROCEDURE - Using StarMOBILE® Standalone Diagnostic Mode
Scheme 112: REPAIR PROCEDURE - Using StarMOBILE® Standalone Diagnostic Mode

Scheme 113

Scheme 113
Scheme 113

Scheme 114

Scheme 114
Scheme 114

Scheme 115

Scheme 115
Scheme 115

Scheme 116

Scheme 116
Scheme 116

Scheme 117

Scheme 117
Scheme 117
  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-304335-S12958153802008110700000) 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-304335-S17349640592008110700000) for details).

OBTAINING DTC'S USING SCAN TOOL

  1. Connect the scan tool to the data link (diagnostic) connector. This connector is located in the passenger compartment; at the lower edge of instrument panel; near the steering column.
  2. Turn the ignition switch on and access the "Read Fault" screen.
  3. Record all the DTC's and "freeze frame" information shown on the scan tool.
  4. To erase DTC's, use the "Erase Trouble Code" data screen on the scan tool. Do not erase any DTC's until problems have been investigated and repairs have been performed.

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.

  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 checkmark 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-304335-S11978519682008110700000) 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-304335-S17349640592008110700000) for details).

More articles — Electronic Control Modules - Service Information