DTC C1290: CAN Time-Out Error: 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 lines. 

   Using scan tool MB991958, diagnose the CAN bus lines.

   Q: Is the check result normal? 

   1. YES:  Go to Step 2.
   2. NO:  Repair the CAN bus lines. (Refer to TROUBLESHOOTING .) After repairing the CAN bus line, go to Step  4.
2. STEP 2. Scan tool diagnostic trouble code 

   Check that diagnostic trouble code U0100, U0101, U0126, U0141, U0136 or U0251 is set in ASC-ECU.

   Q: Is any DTC set? 

   1. YES:  Perform troubleshooting for the diagnostic trouble code that is set. (Refer to DIAGNOSTIC TROUBLE CODE CHART  .)
   2. NO:  Go to Step 3.
3. STEP 3. Scan tool diagnostic trouble code for other systems 

   Using scan tool MB991958, check if the diagnostic trouble codes are set from the engine control module, transaxle assembly (with built-in ECU) <TC-SST>, S-AWC-ECU, and ETACS-ECU.

   Q: Is any DTC set? 

   1. YES:  Perform troubleshooting for the diagnostic trouble code that is set. Then go to Step 4.
   2. NO:  Go to Step 4.
4. STEP 4. Connector check: ASC-ECU connector 

   Q: Is the check result normal? 

   1. YES:  Go to Step 5.
   2. NO:  Repair the defective connector. Then go to Step 5.
5. STEP 5. ETACS-ECU coding data check 

   Check the following coding data stored in ETACS-ECU. (Refer to CODING TABLE .)

   Vehicle line 

   OK: LANCER EVO 

   Transaxle 

   OK (Vehicles without TC-SST): 5MT 

   OK (Vehicles with TC-SST): TC-SST 

   Engine type 

   OK: D4 V.V.T. 2.0L TC 

   Engine power 

   OK: Normal 

   Chassis Type for A.S.C. 

   OK: Type 1 

   Final drive 

   OK: AWD FF Base 

   Transfer 

   OK: ACD 

   SAS 

   OK: Present 

   AWD 

   OK: Not present 

   TCM 

   OK (Vehicles without TC-SST): Not present 

   OK (Vehicles with TC-SST): Present 

   ACDAYC 

   OK: Present 

   Q: Is the check result normal? 

   1. YES:  Go to Step 6.
   2. NO:  Replace the ETACS-ECU. (Refer to ETACS-ECU .) Then go to Step  7.
6. STEP 6. Check whether the DTC is reset. 

   Erase the DTC.

   Q: Is DTC C1290 set? 

   1. YES:  Replace the hydraulic unit (integrated with ASC-ECU). (Refer to HYDRAULIC UNIT  .) Then go to Step 7.
   2. NO:  Intermittent malfunction. (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION .)
7. STEP 7. Check whether the DTC is reset. 

   Erase the DTC.

   Q: Is DTC C1290 set? 

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