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.
2014 Honda FitFACTORY OEM SERVICE PROCEDURE
Section 49 (Multiplex Integrated Control System)
WARNING: This page is about a different car, the 2013 Honda Fit, 2012 Honda Fit, 2011 Honda Fit, 2010 Honda Fit, and 2009 Honda Fit. However, it is still accessible from the selected car via links, so may be relevant.
- Component Location Index
- General Troubleshooting Information
- DTC Troubleshooting Index
- System Description
- Body Controller Area Network (B-CAN) and Fast Controller Area Network (F-CAN)
- Gateway Function
- Network "Loss of Communication" Error Checking Function
- Self-Diagnostic Function
- Wake-Up and Sleep Function
- Fail-Safe Function
- Hardware Fail-Safe Control
- Software Fail-Safe Control
- Power Supply Voltage Monitoring Function
- Combination Light Switch
- Fog Lights
- Turn Signal/Hazard Warning Lights
- Entry Light Control System
- Cargo Area Light
- Daytime Running Lights
- Windshield Wiper/Washer
- Rear Window Wiper
- Windshield/Rear Window Washer
- Key Interlock (A/T)
- Power Window Timer Operation
- Collision Detection Signal (CDS)
- Power Door Locks
- Keyless Entry System
- Auto Door Locks (LOCK operation)
- Auto Door Locks (UNLOCK Operation)
- Keyless Panic Function
- Security Alarm System
- Answer Back Response Operation
- HDS Inputs, Outputs and Commands
- Troubleshooting - B-CAN System Diagnosis Test Mode A
- Troubleshooting - B-CAN System Diagnosis Test Mode B
- Troubleshooting - B-CAN System Diagnosis Test Mode C
- Troubleshooting - B-CAN System Diagnosis Test Mode D
- Troubleshooting - B-CAN System Diagnosis Test Mode 1 and Test Mode 2 (Without the HDS)
- Sleep and Wake-up Mode Test
- Circuit Diagram
- DTC Troubleshooting
- DTC B1000: Communication Circuit Error (BUS-OFF)
- DTC B1002: MICU Internal Error (EEPROM Error)
- DTC B1011: MICU Lost Communication With Gauge Control Module (VSP/NE Message)
- DTC B1036: IG1 Power Supply Circuit Malfunction
- DTC B1150: Communication Circuit Error (BUS-OFF)
- DTC B1900: Communication Circuit Error (BUS Off)
- DTC U1280: Communication Bus Line Error (BUS-OFF)
- MICU Input Test
Factory Service Tools
Use the Manual With the Right Hardware
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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.
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