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.
2007 Acura RLFACTORY OEM SERVICE PROCEDURE
Section 45 (Multiplex Integrated Control System)
WARNING: This page is about a different car, the 2008 Acura TL and 2007 Acura TL. 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
- 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)
- Gauge Control Module DTC Display
- Circuit Diagram
- DTC Troubleshooting
- DTC B1000: Communication Bus Line Error (BUS Off)
- DTC B1050: Communication Bus Line Error (BUS Off)
- DTC B1100: Communication Circuit Error (BUS Off)
- DTC B1150: Communication Bus Line Error (BUS Off)
- DTC B1250: Communication Bus Line Error (BUS Off)
- DTC B1550: Communication Bus Line Error (BUS Off)
- DTC B1700: Communication Bus Line Error (BUS Off)
- DTC B1750: Communication Bus Line Error (BUS Off)
- DTC B1800: Communication Bus Line Error (BUS Off)
- DTC B2200: B-Can Bus Off
- DTC B1001: Multiplex Integrated Control Unit (MICU) Internal Error (CPU Error); DTC B1002: Multiplex Integrated Control Unit (MICU) Internal Error (EEPROM Error)
- DTC B1102: Door Multiplex Control Unit Internal Error
- DTC B1005: MICU Lost Communication with Relay Control Module
- DTC B1006: MICU Lost Communication with Door Multiplex Control Unit (Door Lock Switch Message)
- DTC B1007: MICU Lost Communication with Combination Switch Control Unit (Headlight Switch Message)
- DTC B1008: MICU Lost Communication with Gauge Control Module (A/T Message)
- DTC B1010: MICU Lost Communication with Door Multiplex Control Unit (Panic Message)
- DTC B1011: MICU Lost Communication with Gauge Control Module (VSP/NE Message)
- DTC B1032: MICU Lost Communication with the Gauge Control Module (CDS Message)
- DTC B1080: Power Supply Circuit (IG1 Line) Input Error for Relay Control Module and MICU
- DTC B1255: Combination Switch Control Unit Lost Communication With MICU
- MICU Input Test
- Gauge Control Module Input Test
- Door Multiplex Control Unit Input Test
- Combination Switch Control Unit Input Test
- Relay Control Module 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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