How To Proceed With Troubleshooting

HINT:

The intelligent tester can be used in steps  3,  4,  5,  7 and  11.

1. VEHICLE BROUGHT TO WORKSHOP 
2. CUSTOMER PROBLEM ANALYSIS 
   1. Confirm problem symptoms.
3. CHECK MULTIPLEX COMMUNICATION SYSTEM 
   1. Check for DTCs (See DTC CHECK/CLEAR ).

      HINT:

      The 4WD control ECU sends the signals from the indicator light to the gateway ECU via CAN communication, and the gateway ECU sends the signals to the combination meter assembly via the multiplex communication system (BEAN).

      Result 

      DTC RESULT REFERENCE
      
      

      Result	Proceed to
      DTC is not output	A
      DTC is output	B

   B: CHECK MULTIPLEX COMMUNICATION CIRCUIT 

   A: Go to next step 

4. CHECK CAN COMMUNICATION SYSTEM 
   1. Check for DTCs (See DTC CHECK / CLEAR  ).

      HINT:

      The ECU of this system is connected to the CAN communication system.

      Therefore before starting troubleshooting, make sure to check that there is no trouble in the CAN communication system.

      Result 

      DTC RESULT REFERENCE
      
      

      Result	Proceed to
      DTC is not output	A
      DTC is output	B

   B: CHECK CAN COMMUNICATION CIRCUIT 

   A: Go to next step 

5. CHECK DTC 
   1. Check for DTCs (See DTC CHECK / CLEAR  ).
      1. Record the DTCs.
   2. Clear the DTCs.
   3. Recheck for DTCs.
      1. Reproduce the malfunction and check if the DTCs are output again.

         Result 

         DTC RESULT REFERENCE
         
         

         Result	Proceed to
         DTC is output	A
         DTC is not output	B
         DTCs are not output, and the malfunction cannot be reproduced or checked	C

   B: GO TO STEP  10

   C: SYMPTOM SIMULATION 

   A: Go to next step 

6. DTC CHART 
   1. Go to "DIAGNOSTIC TROUBLE CODE CHART " (See ).
7. CIRCUIT INSPECTION 
8. REPAIR 
9. CONFIRMATION TEST 

   NEXT: END 

10. HYDRAULIC TEST 
    1. Perform hydraulic test (See HYDRAULIC TEST  ).

    NG: REPAIR HYDRAULIC CIRCUIT 

    OK: Go to next step 

11. PROBLEM SYMPTOMS TABLE 
    1. Go to "PROBLEM SYMPTOMS TABLE " (See ).
12. CIRCUIT INSPECTION 
13. REPAIR 
14. CONFIRMATION TEST 

    NEXT: END