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 

   NEXT 

2. CUSTOMER PROBLEM ANALYSIS 
   1. Confirm problem symptoms.

   NEXT 

3. CHECK MULTIPLEX COMMUNICATION SYSTEM 
   1. Check for DTCs (See DTC CHECK / CLEAR ).

      HINT:

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

      Result 

      DTC OUTPUT RESULT
      
      

      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 CAN communication system.

      Result 

      DTC OUTPUT RESULT
      
      

      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. Simulate the malfunction and check if the DTCs are output again.

         Result 

         DTC OUTPUT RESULT
         
         

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

   B : GO TO STEP   10 

   C : SYMPTOM SIMULATION 

   A : Go to next step 

6. DTC CHART 

   NEXT 

7. CIRCUIT INSPECTION 

   NEXT 

8. REPAIR 

   NEXT 

9. CONFIRMATION TEST 

   NEXT: END 

10. PROBLEM SYMPTOMS TABLE  

    NEXT 

11. CIRCUIT INSPECTION 

    NEXT 

12. CONFIRMATION TEST 

    NEXT: END