How To Proceed With Troubleshooting

HINT:

• DTCs for the CAN communication system are as follows: U0073/42, U0100/65 and U0001
• Refer to the troubleshooting procedures of each system if DTCs regarding the CAN communication system are not output,
• *: Use the intelligent tester (with CAN VIM).

1. VEHICLE BROUGHT TO WORKSHOP 
2. INSPECT BATTERY VOLTAGE 

   Standard voltage: 

   11 to 14 V 

   If the voltage is below 11 V, recharge or replace the battery before proceeding.

3. CHECK AND CLEAR DTC* 
4. CHECK CAN BUS LINE 
   1. Check the CAN bus line (see INSPECTION PROCEDURE  ).
5. CHECK INTELLIGENT TESTER VIA CAN VIM* 
   1. Select "BUS CHECK" (see DIAGNOSIS SYSTEM  ).

      Result 

      RESULT CHART
      
      

      Result	Proceed
      All ECUs connected to CAN communication system are displayed.	A
      An ECU not connected to CAN communication system is displayed.	B

      NOTE: ECUs that are not installed are not displayed. Therefore, do not assume that those ECUs are having a communication stop malfunction.

   B: COMMUNICATION STOP MODE TABLE 

   A: Go to Next step 

6. DTC COMBINATION TABLE 
   1. Confirm the trouble according to the combination of output DTCs regarding the CAN communication system.

      HINT:

      Previous CAN communication system DTCs may be the cause if CAN communication system DTCs are output and all ECUs connected to the CAN communication system are displayed on the intelligent tester's "BUS CHECK" screen via the CAN VIM.

7. CIRCUIT INSPECTION 
8. IDENTIFICATION OF PROBLEM 
9. REPAIR OR REPLACE 
10. CONFIRMATION TEST 

    NEXT: END