DTC U1104: SAS Can Timeout/Not Equipped: Diagnosis

Required Special Tools: 

• MB991958: Scan Tool (M.U.T.-III Sub Assembly)
  • MB991824: Vehicle Communication Interface (V. C. I.)
  • MB991827: M.U.T.-III USB Cable
  • MB991910: M.U.T.-III Main Harness A

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.
   2. Turn the ignition switch to "ON" position.
   3. Diagnose the CAN bus line.

   Q: Is the check result satisfactory? 

   YES  : Go to Step 2.

   NO  : Repair the CAN bus lines. Refer to CONTROLLER AREA NETWORK (CAN) . On completion, go to Step  6.

   Fig 1: Connecting Scan Tool MB991958 To Data Link Connector

   Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
2. STEP 2. Using scan tool MB991958, read the steering wheel sensor diagnostic trouble code. 

   Check if a steering wheel sensor DTC is set.

   Q: Is the DTC set? 

   YES  : Diagnose the steering wheel sensor by referring to DIAGNOSTIC TROUBLE CODE CHART  .

   NO  : Go to Step 3.

3. STEP 3. Using scan tool MB991958 read any of the diagnostic trouble code. 

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

   Engine control module

   Power train control module

   • DTC U1100: ABS-ECU time-out

   Combination meter

   • DTC 011: ABS-ECU time-out

   Q: Is the DTC set? 

   YES  : Go to Step 4.

   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? 

   YES  : A poor connection, open circuit or other intermittent malfunction is present in the CAN bus lines between the steering wheel sensor and the TCL/ASC-ECU (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTIONS ).

   NO  : Replace hydraulic unit (integrated with TCL/ASC-ECU) 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? 

   YES  : A poor connection, open circuit or other intermittent malfunction is present in the CAN bus lines between the steering wheel sensor and the TCL/ASC-ECU (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTIONS ).

   NO  : Replace steering wheel sensor 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? 

   YES  : The procedure is complete.

   NO  : Go to Step  1.