How To Proceed With Troubleshooting

1. Check if the vehicle is equipped with any of the following: dynamic laser cruise control (See DIAGNOSIS SYSTEM  ).

1. Refer to CHECK CAN BUS LINE .

1. Select "BUS CHECK" (See DIAGNOSIS SYSTEM  ).

   Result 

   RESULT TABLE
   
   

   Symptom	Proceed to
   All the ECUs and sensors connected to the CAN communication system are displayed on the screen.	A
   An ECU or sensor connected to the CAN communication system is not displayed on the screen.	B (See PROBLEM SYMPTOMS TABLE  )
   More than one of the ECUs and sensors connected to the CAN communication system are not displayed on the screen.	C (See OPEN IN ONE SIDE OF CAN BRANCH LINE  )

   NOTE:

   • The systems (ECUs, sensors) that adopt CAN communication vary depending on the vehicle and optional equipment. Check which systems (ECUs, sensors) are installed on the vehicle (See DIAGNOSIS SYSTEM  ).
   • Non-installed ECUs or sensors are not displayed. Do not mistake them for being in the communication stop mode.
   • If 2 or more ECUs or sensors are not displayed on the intelligent tester via the CAN VIM, perform troubleshooting for communication stop mode for each undisplayed ECU or sensor. (Open in one side of the CAN branch wires.)

B: GO TO  COMMUNICATION STOP MODE TABLE  

C: GO TO  OPEN IN ONE SIDE OF CAN BRANCH LINE  

A: Go to Next Step 

1. Confirm 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 and sensors connected to the CAN communication system are displayed on the intelligent tester's "BUS CHECK" screen via CAN VIM.

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