How to Proceed With Troubleshooting

CAN COMMUNICATION: CAN COMMUNICATION SYSTEM: HOW TO PROCEED WITH TROUBLESHOOTING

HOW TO PROCEED WITH TROUBLESHOOTING
NOTE: Refer to troubleshooting of each system if DTCs regarding the CAN communication system are not output.

1. CHECK AND CLEAR DTCS
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2. CHECK FOR INSTALLED SYSTEMS (ECUS & SENSORS) THAT ADOPT CAN COMMUNICATION
(a) Check if the vehicle is equipped with any of the following: dynamic laser cruise control Diagnosis System.
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3. CHECK CAN BUS LINE
(a) Refer to "Check CAN Bus Line" Check CAN Bus Line.
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4. CHECK INTELLIGENT TESTER VIA CAN VIM
(a) Select "BUS CHECK" Diagnosis System.
Result:





NOTICE:
- 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 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 "CHECK FOR AN OPEN IN ONE SIDE OF THE CAN BRANCH LINE"
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5. DTC COMBINATION TABLE
(a) 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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6. CIRCUIT INSPECTION
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7. IDENTIFICATION OF PROBLEM
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8. REPAIR OR REPLACE
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9. CONFIRMATION TEST
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