Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode B - Control Unit Not Communicating
WARNING: This page is about a different car, the 2022 Honda Accord, 2021 Honda Accord, 2020 Honda Accord, 2019 Honda Accord, and 2018 Honda Accord. However, it is still accessible from the selected car via links, so may be relevant.
Do this diagnosis if any of the control units are not communicating (NOT AVAILABLE is displayed in the HDS) as found by the B-CAN System Diagnosis Test Mode A .
1. Using the HDS, select the system that has the symptom from the BODY ELECTRICAL SYSTEM SELECT menu.
2. Select DTCs, and then check for loss of communication DTCs.
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If any loss of communication DTCs are indicated, go to step 3.
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If any loss of communication DTCs are not indicated, replace the body control module .
3. Do the power, ground, and communication part of the input test for the unit (s) not communicating with the HDS.
| Unit not communicating |
|---|
| Body control module |
| Gauge control module |
| Head up display |
| Climate control unit |
| Power window master switch |
| Automatic lighting control unit-sensor |
| Power seat control unit |
| Relay control module |
| Front seat heater control unit |
| Ventilated seat control unit |
| Wireless charger |
| Audio unit |
| Audio-navigation unit |
| Telematics control unit |
| Left side BSI radar unit |
| Right side BSI radar unit |