DTC U1100: Powertrain Control Module Time-out (Related to Engine) DTC U1101: Powertrain Control Module Time-out (Related to A/T): Diagnosis

Required Special Tools: 

• MB991958: Scan Tool (MUT-III Sub Assembly)
  • MB991824: Vehicle Communication Interface (V.C.I.)
  • MB991827: MUT-III USB Cable
  • MB991911: MUT-III Main Harness A (Vehicles with CAN communication system)

1. STEP 1. Using scan tool MB991958, diagnose the CAN bus line. 

   Use scan tool MB991958 to diagnose the CAN bus lines.

   1. Connect scan tool MB991958 to the data link connector.
      Fig 1: Connecting Scan Tool To Data Link Connector

      Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
   2. Turn the ignition switch to "ON" position.
   3. Diagnose the CAN bus line.

   Q: Is the check result satisfactory? 

   1. YES  : Go to Step 2.
   2. NO  : Repair the CAN bus lines (Refer to DIAGNOSIS-CAN BUS DIAGNOSTIC CHART < vehicles without advanced air bag > or < vehicles with advanced air bag>). On completion, go to  Step 6.
2. STEP 2. Using scan tool MB991958, read the MFI system diagnostic trouble code. 

   Check if an MFI system DTC is set.

   Q: Is the DTC set? 

   1. YES  : Diagnose the MFI system by referring to MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS .
   2. NO  : Go to Step 3.
3. STEP 3. Using scan tool MB991958, read the other system diagnostic trouble code. 

   Check if a DTC, which relates to CAN communication-linked systems below, is set.

   ABS-ECU

   • DTC U1100: Powertrain control module time-out (related to Engine) < vehicles with TCL>
   • DTC U1101: Powertrain control module time-out (related to automatic transmission) < vehicles with TCL>

   Multi-center display

   • DTC 011: Powertrain control module time-out (related to Engine)
   • DTC 012: Powertrain control module time-out (related to A/T)

   ETACS-ECU

   • DTC 011: Powertrain control module time-out (related to Engine)
   • DTC 012: Powertrain control module time-out (related to A/T)

   A/C-ECU

   • DTC U1100: Powertrain control module time-out (related to Engine)

   Q: Is the DTC set? 

   1. YES  : Go to Step 4.
   2. NO  : Go to  Step 5.
4. STEP 4. Recheck for diagnostic trouble code. 

   Recheck if the DTC is set.

   1. Erase the DTC.
   2. Turn the ignition switch to "ON" position.
   3. Check if the DTC is set.

   Q: Is the check result satisfactory? 

   1. YES  : A poor connection, open circuit or other intermittent malfunction is present in the CAN bus lines between the powertrain control module and the combination meter (Refer to HOW TO USE TROUBLESHOOTING/INSPECTION SERVICE POINTS - HOW TO COPE WITH INTERMITTENT MALFUNCTION ).
   2. NO  : Replace powertrain control module and then go to  Step 6.
5. STEP 5. Recheck for diagnostic trouble code. 

   Recheck if the DTC is set.

   1. Erase the DTC.
   2. Turn the ignition switch to "ON" position.
   3. Check if the DTC is set.

   Q: Is the check result satisfactory? 

   1. YES  : A poor connection, open circuit or other intermittent malfunction is present in the CAN bus lines between the powertrain control module and the combination meter (Refer to HOW TO USE TROUBLESHOOTING/INSPECTION SERVICE POINTS - HOW TO COPE WITH INTERMITTENT MALFUNCTION ).
   2. NO  : Replace combination meter and then go to Step 6.
6. STEP 6. Recheck for diagnostic trouble code. 

   Recheck if the DTC is set.

   1. Erase the DTC.
   2. Turn the ignition switch to "ON" position.
   3. Check if the DTC is set.

   Q: Is the check result satisfactory? 

   1. YES  : The procedure is complete.
   2. NO  : Go to  Step 1.