IMM I2C tests

Use this information to resolve IMM I2C-test errors by referencing the error codes and following the suggested corrective actions.

Follow the suggested actions in the order in which they are listed in the Action column until the problem is solved.
  • See Parts listing, Types 7871 and 1949 to determine which components are CRUs and which components are FRUs.
  • If an action step is preceded by "(Trained service technician only)," that step must be performed only by a trained service technician.
Error code Description Action
166-901-xxx Failed the IMM I2C test due to a failure in the host bus.
  1. Turn off the blade server, open the blade server release levers and pull the blade server away from the blade server bay, but do not remove it. See Removing the blade server from the BladeCenter unit.
  2. Wait 45 seconds and reseat the blade server in the blade server bay and turn on the blade server. See Installing the blade server in a BladeCenter unit and Turning on the blade server.
  3. Rerun the test. See Diagnostic tools overview.
  4. Make sure that the DSA Diagnostic code is up-to-date, upgrade if necessary; then, rerun the test. The latest code can be found on the IBM support Web site at http://www.ibm.com/support/docview.wss?uid=psg1SERV-DSA.
  5. Make sure that the component firmware level is up-to-date, upgrade if necessary; then, rerun the test. The installed firmware level can be found in the DSA Diagnostic Event Log within the Firmware/VPD section for this component. The latest level firmware for this component can be found on the IBM support Web site at http://www.ibm.com/support/docview.wss?uid=psg1MIGR-4JTS2T.
  6. Turn off the blade server and reseat the blade server in the blade server bay and turn on the blade server. See Removing the blade server from the BladeCenter unit and Turning on the blade server.
  7. Rerun the test. See Diagnostic tools overview.
  8. If the failure remains, refer to Removing and replacing blade server components to replace the failed component.
166-903-xxx Failed the IMM I2C test due to a failure in the DIMM bus.
  1. Turn off the blade server, open the blade server release levers and pull the blade server away from the blade module bay, but do not remove it. See Removing the blade server from the BladeCenter unit for more information.
  2. Wait 45 seconds and reseat the blade server in the blade module bay and turn on the blade server. See Installing the blade server in a BladeCenter unit and Turning on the blade server.
  3. Rerun the test. See Diagnostic tools overview.
  4. Make sure that the DSA Diagnostic code is up-to-date, upgrade if necessary; then, rerun the test. The latest code can be found on the IBM support Web site at http://www.ibm.com/support/docview.wss?uid=psg1SERV-DSA.
  5. Make sure that the component firmware level is up-to-date, upgrade if necessary; then, rerun the test. The installed firmware level can be found in the DSA Diagnostic Event Log within the Firmware/VPD section for this component. The latest level firmware for this component can be found on the IBM support Web site at http://www.ibm.com/support/docview.wss?uid=psg1MIGR-4JTS2T.
  6. Reseat the DIMMs (see Removing a memory module and Installing a memory module).
  7. Rerun the test.
  8. If the error occurs, replace one DIMM at a time until the error is resolved (see Removing a memory module and Installing a memory module).
  9. Rerun the test.
  10. (Trained service technician) If the failure remains, replace the system-board (see Removing the system-board assembly and Installing the system-board assembly).
166-904-xxx Failed the IMM I2C test indicates failure in the blade expansion unit, high-speed daughter card, or light path diagnostics panel.
  1. Turn off the blade server, open the blade server release levers and pull the blade server away from the blade server bay, but do not remove it. See Removing the blade server from the BladeCenter unit for more information.
  2. Wait 45 seconds and reseat the blade server in the blade module bay and turn on the blade server. See Installing the blade server in a BladeCenter unit and Turning on the blade server.
  3. Rerun the test. See Diagnostic tools overview.
  4. Make sure that the DSA Diagnostic code is up-to-date, upgrade if necessary; then, rerun the test. The latest code can be found on the IBM support Web site at http://www.ibm.com/support/docview.wss?uid=psg1SERV-DSA.
  5. Make sure that the component firmware level is up-to-date, upgrade if necessary; then, rerun the test. The installed firmware level can be found in the DSA Diagnostic Event Log within the Firmware/VPD section for this component. The latest level firmware for this component can be found on the IBM support Web site at http://www.ibm.com/support/docview.wss?uid=psg1MIGR-4JTS2T.
  6. Reseat the following components:
    1. Reseat the expansion unit, if one is installed (see Removing an optional expansion unit and Installing an optional expansion unit).
    2. Reseat all high-speed expansion cards in the blade server (see Removing an I/O expansion card and Installing an I/O expansion card).
    3. Reseat the bezel and control-panel cable (see Removing the bezel assembly and Installing the bezel assembly)
  7. Rerun the test. See Diagnostic tools overview.
  8. (Trained service technician) If the failure remains, replace the system-board (see Removing the system-board assembly and Installing the system-board assembly).
166-906-xxx Failed the IMM I2C test due to a failure in the memory configuration bus.
  1. Turn off the blade server, open the blade server release levers and pull the blade server away from the blade server bay, but do not remove it from the bay. See Removing the blade server from the BladeCenter unit for more information.
  2. Wait 45 seconds and reseat the blade server in the blade module bay and turn on the blade server. See Installing the blade server in a BladeCenter unit and Turning on the blade server.
  3. Rerun the test. See Diagnostic tools overview.
  4. Make sure that the DSA Diagnostic code is up-to-date, upgrade if necessary; then, rerun the test. The latest code can be found on the IBM support Web site at http://www.ibm.com/support/docview.wss?uid=psg1SERV-DSA.
  5. Make sure that the IMM firmware level is up-to-date, upgrade if necessary; then, rerun the test. The installed firmware level can be found in the DSA Diagnostic Event Log within the Firmware/VPD section for this component. The latest level firmware for this component can be found on the IBM support Web site at http://www.ibm.com/support/docview.wss?uid=psg1MIGR-4JTS2T.
  6. Turn off the blade server, open the blade server release levers and pull the blade server away from the blade server bay, but do not remove it from the bay. See Removing the blade server from the BladeCenter unit for more information.
  7. Wait 45 seconds and reseat the blade server in the blade module bay and turn on the blade server. See Installing the blade server in a BladeCenter unit and Turning on the blade server.
  8. Rerun the test. See Diagnostic tools overview.
  9. (Trained service technician) If the failure remains, replace the system-board (see Removing the system-board assembly and Installing the system-board assembly).
166-920-xxx Failed the IMM I2C test due to a failure in the EXP A0 bus.
  1. Turn off the blade server, open the blade server release levers and pull the blade server away from the blade server bay, but do not remove it. See Removing the blade server from the BladeCenter unit for more information.
  2. Wait 45 seconds and reseat the blade server in the blade module bay and turn on the blade server. See Installing the blade server in a BladeCenter unit and Turning on the blade server.
  3. Rerun the test. See Diagnostic tools overview.
  4. Make sure that the DSA Diagnostic code is up-to-date, upgrade if necessary; then, rerun the test. The latest code can be found on the IBM support Web site at http://www.ibm.com/support/docview.wss?uid=psg1SERV-DSA.
  5. Make sure that the IMM firmware level is up-to-date, upgrade if necessary; then, rerun the test. The installed firmware level can be found in the DSA Diagnostic Event Log within the Firmware/VPD section for this component. The latest level firmware for this component can be found on the IBM support Web site at http://www.ibm.com/support/docview.wss?uid=psg1MIGR-4JTS2T.
  6. Reseat the expansion unit, if one is installed (see Removing an optional expansion unit and Installing an optional expansion unit).
  7. Rerun the test. See Diagnostic tools overview.
  8. (Trained service technician) If the failure remains, replace the system-board (see Removing the system-board assembly and Installing the system-board assembly).
166-921-xxx Failed the IMM I2C test due to a failure in the EXP A1 bus.
  1. Turn off the blade server, open the blade server release levers and pull the blade server away from the blade server bay, but do not remove it. See Removing the blade server from the BladeCenter unit for more information.
  2. Wait 45 seconds and reseat the blade server in the blade module bay and turn on the blade server. See Installing the blade server in a BladeCenter unit and Turning on the blade server.
  3. Rerun the test. See Diagnostic tools overview.
  4. Make sure that the DSA Diagnostic code is up-to-date, upgrade if necessary; then, rerun the test. The latest code can be found on the IBM support Web site at http://www.ibm.com/support/docview.wss?uid=psg1SERV-DSA.
  5. Make sure that the IMM firmware level is up-to-date, upgrade if necessary; then, rerun the test. The installed firmware level can be found in the DSA Diagnostic Event Log within the Firmware/VPD section for this component. The latest level firmware for this component can be found on the IBM support Web site at http://www.ibm.com/support/docview.wss?uid=psg1MIGR-4JTS2T.
  6. Reseat the following components:
    1. Reseat the expansion unit, if one is installed (see Removing an optional expansion unit and Installing an optional expansion unit).
    2. Reseat all high-speed expansion cards in the blade server (see Removing an I/O expansion card and Installing an I/O expansion card).
    3. Reseat the bezel and control-panel cable (see Removing the bezel assembly and Installing the bezel assembly)
  7. Rerun the test. See Diagnostic tools overview.
  8. (Trained service technician) If the failure remains, replace the system-board (see Removing the system-board assembly and Installing the system-board assembly).
166-922-xxx Failed the IMM I2C test due to a failure in the EXP A2 bus.
  1. Turn off the blade server, open the blade server release levers and pull the blade server away from the blade server bay, but do not remove it. See Removing the blade server from the BladeCenter unit for more information.
  2. Wait 45 seconds and reseat the blade server in the blade module bay and turn on the blade server. See Installing the blade server in a BladeCenter unit and Turning on the blade server.
  3. Rerun the test. See Diagnostic tools overview.
  4. Make sure that the DSA Diagnostic code is up-to-date, upgrade if necessary; then, rerun the test. The latest code can be found on the IBM support Web site at http://www.ibm.com/support/docview.wss?uid=psg1SERV-DSA.
  5. Make sure that the IMM firmware level is up-to-date, upgrade if necessary; then, rerun the test. The installed firmware level can be found in the DSA Diagnostic Event Log within the Firmware/VPD section for this component. The latest level firmware for this component can be found on the IBM support Web site at http://www.ibm.com/support/docview.wss?uid=psg1MIGR-4JTS2T.
  6. Reseat the following components:
    1. Reseat the expansion unit, if one is installed (see Removing an optional expansion unit and Installing an optional expansion unit).
    2. Reseat all high-speed expansion cards in the blade server (see Removing an I/O expansion card and Installing an I/O expansion card).
    3. Reseat the bezel and control-panel cable (see Removing the bezel assembly and Installing the bezel assembly)
  7. Rerun the test. See Diagnostic tools overview.
  8. (Trained service technician) If the failure remains, replace the system-board (see Removing the system-board assembly and Installing the system-board assembly).
Parent topic: Diagnostic messages