CAN COMMUNICATION SYSTEM PROBLEM SYMPTOMS TABLE
Tech Tips
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Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
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Inspect the fuses and relays related to this system before inspecting the suspected areas below.
| Symptom | Suspected Area | See page |
|---|---|---|
| Result of "How to proceed with Troubleshooting" is "Open in CAN Main Bus Line" | Open in CAN Main Bus Line | |
| Result of "How to Proceed with Troubleshooting" is "Short in CAN Bus Lines" | Short in CAN Bus Lines | |
| Result of "How to Proceed with Troubleshooting" is "Short to B+ in CAN Bus Line" | Short to B+ in CAN Bus Line | |
| Result of "How to Proceed with Troubleshooting" is "Short to GND in CAN Bus Line" | Short to GND in CAN Bus Line | |
| Result of "How to Proceed with Troubleshooting" is "Open in One Side of CAN Branch Line" | Open in One Side of CAN Branch Line |
Tech Tips
Refer to How to Proceed with Troubleshooting for the CAN V1 Bus Check procedure.
| Symptom | Suspected Area | See page |
|---|---|---|
| "Air Conditioning Amplifier" is not displayed on the intelligent tester (w/ Air Conditioning System, except 5L-E) | Air Conditioning Amplifier Communication Stop Mode | |
| "ECM (Engine)" is not displayed on the intelligent tester | ECM Communication Stop Mode | |
| "Combination Meter" is not displayed on the intelligent tester | Combination Meter ECU Communication Stop Mode | |
| "Certification (Smart)" is not displayed on the intelligent tester (w/ Smart Entry and Start System) | Certification ECU Communication Stop Mode | |
| "Headlight swivel (AFS)" is not displayed on the intelligent tester (for LED Headlight) | AFS Communication Stop Mode |