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. 
   WARNING: During inspection, the vehicle might move suddenly or the engine might stop. Be sure to depress the brake pedal securely. In addition, perform the vehicle inspection in a safe place isolated from people or objects.
   1. With the brake pedal pressed, start the engine.
   2. With the engine idle status, operate the shift lever in the following sequence: P → R → D. (Hold each range for 1 seconds or more.)
   3. Check that the DTC is stored again.

   Q: Is DTC No. P2733 stored? 

   1. YES:  Go to Step 3.
   2. NO:  Intermittent malfunction. (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION .)
3. STEP 3. Check the fluid. 

   Q: Is the fluid level proper? 

   1. YES:  Go to Step 4.
   2. NO:  Add the fluid.
4. STEP 4. Check the installation status of the mechatronic assembly. 

   Q: Is the mechatronic assembly installed correctly? 

   1. YES:  Replace the mechatronic assembly. (Refer to << A >> MECHATRONIC ASSEMBLY REMOVAL .)
   2. NO:  Install the mechatronic assembly correctly. (Refer to >> B << GASKET A/GASKET C/MECHATRONIC ASSEMBLY INSTALLATION .)