Diagnostic Procedure

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. Scan tool CAN bus diagnostics 

   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. After repairing the CAN bus line, go to Step 2.
2. STEP 2. Check whether the DTC is stored again. 

   After driving in the 3rd gear, check that the DTC is stored again.

   Q: Is DTC No. P1828 stored? 

   1. YES:  Go to Step 3.
   2. NO:  Intermittent malfunction. (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION .)
3. STEP 3. Scan tool diagnostic trouble code 

   Check if a shift fork and shift fork position sensor-related DTC No. other than P1828 is stored.

   Q: Is the DTC stored? 

   1. YES:  Go to  Step 5.
   2. NO:  Go to Step 4.
4. STEP 4. Scan tool Teach-In 
   1. Carry out the Item No. 1: Plausibility check. (Refer to (TEACH-IN REFERENCE TABLE ).)
   2. After Teach-In, check which result ("Yes" or "No") is displayed in the Data list No. 101: Normal End. (Refer to (TEACH-IN REFERENCE TABLE ).)

   Q: Which is displayed, "Yes" or "No"? 

   1. "Yes":  Replace the transaxle assembly. (Refer to << B >> TRANSAXLE ASSEMBLY CONNECTOR REMOVAL
   2. "No":  Go to Step 5.
5. STEP 5. Replace the mechatronic assembly, and check if the DTC is stored again. 

   After driving in the 3rd gear, check that the DTC is stored again.

   Q: Is DTC No. P1828 stored? 

   1. YES:  Replace the transaxle assembly. (Refer to << B >> TRANSAXLE ASSEMBLY CONNECTOR REMOVAL
   2. NO:  This diagnosis is complete.