Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
DTC B1700: Communication Bus Line Error (BUS Off)
2004 Acura TL AutomaticSECTION DTC B1700: Communication Bus Line Error (BUS Off)
NOTE:
If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN system diagnosis test mode A (see
TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A ).
- Clear the DTCs with the HDS.
- Turn the ignition switch OFF, and then back ON (II).
- Check for DTCs with the HDS.
Is DTC B1700 indicated?
- YES - Go to step 4.
- NO - Intermittent failure, the system is OK at this time. Check for loose or poor connections at display panel control unit connector A (14P), and at under-dash fuse/relay box connector N (45P).
- Check for DTCs with the HDS.
Is DTC B1000 indicated?
- YES - Troubleshoot DTC B1000.
- NO - If the B1700 is indicated, replace the display panel control unit.
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.