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.
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HOMESERVICE MANUALSHONDA2009CR-V EX, 2.4 RE3REPAIR AND DIAGNOSISACCESSORIES & EQUIPMENTCOMMUNICATION DEVICESMULTIPLEX INTEGRATED CONTROL SYSTEM
2009 Honda CR-V EX, 2.4 RE3
Multiplex Integrated Control System
2009 Honda CR-V EX, 2.4 RE3SECTION Multiplex Integrated Control System
- Component Location Index
- General Troubleshooting Information
- DTC Troubleshooting Index
- System Description
- MICU Control Functions Index
- 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
- Notes
- Entry Lights Control System (Ceiling Lights, Map Lights, Ignition Key Light)
- Cargo Area Lights Control
- Collision Detection Signal (CDS)
- Key Interlock
- Key-in Reminder
- Power Window Timer Operation
- Headlight
- Daytime Running Lights
- Turn Signal/Hazard Warning Lights
- Automatic Lighting System
- Windshield Wiper
- Windshield Wiper (Vehicle Speed Sensor)
- Rear Window Wiper
- Windshield/Rear Window Washer
- Answer Back Response Operation (Part 1)
- Answer Back Response Operation (Part 2)
- Power Door Locks (1 motion all doors and tailgate unlock)
- Power Door Locks (2 motions all doors and tailgate unlock)
- Door Lock Response Operation
- Keyless Entry System (1 motion all doors and tailgate unlock)
- Keyless Entry System (2 motions all doors and tailgate unlock)
- Keyless PANIC Operation
- Power Door Locks (Lock operation)
- Power Door Locks (UNLOCK operation)
- Security Alarm System
- Tailgate Outer Handle Operation (1 motion all doors and tailgate unlock)
- Tailgate Outer Handle Switch Operation (2 motions all doors and tailgate unlock)
- A/C Pressure Switch
- HDS Inputs 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 Bus Line Error
- DTC B1001: MICU Internal Error (CPU)
- DTC B1002: MICU Internal Error (EEPROM)
- DTC B1008: MICU Lost Communication With the Gauge Control Module (A/T Message); DTC B1011: MICU Lost Communication With the Gauge Control Module (VSP/NE Message)
- DTC B1150: Communication Bus Line Error (Bus-off); DTC B1200: Communication Bus Line Error (Bus-off); DTC B1550: Communication Bus Line Error (Bus-off); DTC B1900: Communication Bus Line Error (Bus-off); DTC U1280: Communication Bus Line Error (Bus-off)
- DTC B1032: MICU Lost Communication With the SRS Unit (CDS Message)
- DTC B1036: IG1 Line Input Error
- MICU Input Test
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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.