Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode A - Initial Communication and DTC Checks
Check the PCM for DTCs and troubleshoot the PCM or F-CAN loss of communication errors first, then do this diagnosis if the symptom is related to the B-CAN system.
Compare the symptom with this list of B-CAN related systems:
- Gauge control module
- Exterior lights
- Turn signals
- Entry light control
- Interior lights
- Safety indicators
- Horns (security and panic)
- Reminder chimes (seat belt, lights-on, and parking brake)
- Power window/moonroof timer
- Wiper/Washer
- Security
- Keyless entry
- Power door locks
- Dashlights brightness
- Immobilizer
- Daytime running lights
- Driving position memory system
- Front passenger's power seat
- Keyless access control
- Climate control
- Ventilated seat
- Seat heater
- Audio and visual system
- Telematics system
- Driving support
- BSI system
- Head up display
- Power tailgate
- Wireless charger
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If the symptom is related to the B-CAN, go to step 2.
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If the symptom is not related to the B-CAN, go to the system symptom troubleshooting.
2. Connect the HDS to the DLC .From the BODY ELECTRICAL SYSTEM SELECT menu, select B-CAN CONTROL UNITS INFORMATION, and then select CHECK CONNECTED CONTROL UNITS listed to see if the following control units are communicating with the HDS.
- Body control module
- Gauge control module
- Climate control unit
- Automatic lighting control unit-sensor
- Driver's door control unit
- Driver's power seat control unit
- Front passenger's power seat control unit
- Relay control module
- Front seat heater control unit
- Ventilated seat control unit
- Second row seat heater control unit
- Wireless charger
- Telematics control unit
- Left side BSI radar unit
- Right side BSI radar unit
- Multipurpose camera unit
- Head up display
- Master lighting control unit
- Power tailgate control unit
- If a unit is communicating with the HDS, "DETECT" is displayed.
- If a unit is not communicating or the vehicle is not equipped, "NOT AVAILABLE" is displayed.
- The HDS only checks the status one time when BODY ELECTRICAL is selected. To recheck the status after repair, reboot the HDS.
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If all control units are communicating with the HDS, go to step 4.
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If any of the control units are not communicating, go to B-CAN System Diagnosis Test Mode B - Refer to: Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode 1 and Test Mode 2 (without the HDS) or Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode B - Control Unit Not Communicating or Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode A - Initial Communication and DTC Checks .
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If all units are not communicating or only the body control module is communicating, go to body control module DTC U1280 troubleshooting .
4. Select the system that has the problem from the BODY ELECTRICAL SYSTEM SELECT menu, then select DTCs.
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If any DTCs are indicated, go to step 5.
Record all DTCs, and sort them by DTC type, then troubleshoot them in this order:
- Internal error DTCs.
- Loss of communication DTCs.
- Signal error DTCs.