DTC U1100: CAN Communications System Time Out Error Engine Related Data: Diagnosis

Required Special Tools:

MB991958: Scan Tool (MUT-III Sub Assembly)
- MB991824: V.C.I.
- MB991827: MUT-III USB Cable
- MB991910: MUT-III Main Harness A

STEP 1. Using scan tool MB991958, diagnose the CAN bus line.
CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
1. Connect scan tool MB991958 to the data link connector. (Refer to HOW TO CONNECT THE SCAN TOOL (MUT-III) ).
2. Turn the ignition switch to the "ON" position.
3. Diagnose the CAN bus line. (Refer to HOW TO DIAGNOSE THE CAN BUS LINE ).
4. Turn the ignition switch to the "LOCK" (OFF) position.
5. Disconnect scan tool MB991958.
Q: Is the CAN bus line found to be normal?
1. YES : Go to Step 2.
2. NO : Repair the CAN bus line. (Refer to DIAGNOSIS ). Then go to Step 6.
  
  Fig 1: Connecting Special Tool MB991910 To Data Link Connector
  Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
STEP 2. Using scan tool MB991958, read the diagnostic trouble code.
CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
1. Connect scan tool MB991958 to the data link connector. (Refer to HOW TO CONNECT THE SCAN TOOL (MUT-III) ).
2. Turn the ignition switch to the "ON" position.
3. Check for MFI system diagnostic trouble code. (Refer to DIAGNOSTIC FUNCTION ).
4. Turn the ignition switch to the "LOCK" (OFF) position.
5. Disconnect scan tool MB991958.
Q: Is any DTC set?
1. YES : Repair the MFI control system. (Refer to DIAGNOSTIC TROUBLE CODE CHART ). Then go to Step 6.
2. NO : Go to Step 3.
  
  Fig 2: Connecting Special Tool MB991910 To Data Link Connector
  Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
STEP 3. Using scan tool MB991958, read the diagnostic trouble code.
CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
1. Connect scan tool MB991958 to the data link connector. (Refer to HOW TO CONNECT THE SCAN TOOL (MUT-III) ).
2. Turn the ignition switch to the "ON" position.
3. Check if a DTC, which relates to CAN communication-linked systems below, is set.
  ETACS-ECU
  - DTC 011: Powertrain control module time-out (related to engine). (Refer to DIAGNOSTIC FUNCTION ).
  Combination meter
  - DTC 011: Powertrain control module time-out (related to engine). (Refer to DIAGNOSIS FUNCTION ).
  Multi-center display
  - DTC 011: Powertrain control module time-out (related to engine). (Refer to DIAGNOSIS FUNCTION ).
  A/C-ECU
  - DTC U1100: Powertrain control module time-out (related to engine). (Refer to DIAGNOSTIC FUNCTION ) < Vehicle with manual A/C > or (Refer to DIAGNOSTIC FUNCTION ) < Vehicle with auto A/C >.
4. Turn the ignition switch to the "LOCK" (OFF) position.
5. Disconnect scan tool MB991958.
Q: Is DTC 011 or U1100 set?
1. YES : Go to Step 4.
2. NO : Go to Step 5.
  
  Fig 3: Connecting Special Tool MB991910 To Data Link Connector
  Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
STEP 4. Using scan tool MB991958, read the diagnostic trouble code.
CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
1. Connect scan tool MB991958 to the data link connector. (Refer to HOW TO CONNECT THE SCAN TOOL (MUT-III) ).
2. Turn the ignition switch to the "ON" position.
3. Use scan tool MB991958 to read the TCL DIAGNOSTIC TROUBLE CODES. (Refer to HOW TO READ AND ERASE DIAGNOSTIC TROUBLE CODES ).
4. Turn the ignition switch to the "LOCK" (OFF) position.
5. Disconnect scan tool MB991958.
Q: Is DTC U1100 set?
1. YES : Replace the PCM. (Refer to POWERTRAIN CONTROL MODULE (PCM) ). Then go to Step 6.
2. NO : It can be assumed that this malfunction is intermittent. (Refer to How to Use Troubleshooting/Inspection Service Points - HOW TO COPE WITH INTERMITTENT MALFUNCTION ).
  
  Fig 4: Connecting Special Tool MB991910 To Data Link Connector
  Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
STEP 5. Using scan tool MB991958, read the diagnostic trouble code.
CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
1. Connect scan tool MB991958 to the data link connector. (Refer to HOW TO CONNECT THE SCAN TOOL (MUT-III) ).
2. Turn the ignition switch to the "ON" position.
3. Use scan tool MB991958 to read the TCL DIAGNOSTIC TROUBLE CODES. (Refer to HOW TO READ AND ERASE DIAGNOSTIC TROUBLE CODES ).
4. Turn the ignition switch to the "LOCK" (OFF) position.
5. Disconnect scan tool MB991958.
Q: Is DTC U1100 set?
1. YES : Replace the hydraulic unit (integrated with ABS/TCL-ECU). (Refer to HYDRAULIC UNIT ). Then Go to Step 6.
2. NO : It can be assumed that this malfunction is intermittent. (Refer to How to Use Troubleshooting/Inspection Service Points - HOW TO COPE WITH INTERMITTENT MALFUNCTION ).
  
  Fig 5: Connecting Special Tool MB991910 To Data Link Connector
  Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
STEP 6. Using scan tool MB991958, read the diagnostic trouble code.
CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
1. Connect scan tool MB991958 to the data link connector. (Refer to HOW TO CONNECT THE SCAN TOOL (MUT-III) ).
2. Turn the ignition switch to the "ON" position.
3. Use scan tool MB991958 to read the TCL DIAGNOSTIC TROUBLE CODES. (Refer to HOW TO READ AND ERASE DIAGNOSTIC TROUBLE CODES ).
4. Turn the ignition switch to the "LOCK" (OFF) position.
5. Disconnect scan tool MB991958.
Q: Is DTC U1100 set?
1. YES : Return to Step 1.
2. NO : The procedure is complete.
  
  Fig 6: Connecting Special Tool MB991910 To Data Link Connector
  Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.