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 MANUALSACURA2008CSX BASE, K20A3REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 48 (MULTIPLEX INTEGRATED CONTROL SYSTEM)
2008 Acura CSX Base, K20A3
Section 48 (Multiplex Integrated Control System)
2008 Acura CSX Base, K20A3SECTION Section 48 (Multiplex Integrated Control System)
WARNING: This page is about a different car, the 2011 Acura TL, 2010 Acura TL, and 2009 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
- 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 (On-board diagnosis)
- Wake-up and Sleep Function
- Fail-safe Function
- Hardware Fail-safe Control
- Software Fail-safe Control
- Driver's MICU
- Power Supply Voltage Monitoring Function
- Entry Lights Control System (Ceiling Lights, Map Lights, Ignition Key Light)
- Collision Detection Signal (CDS)
- Key Interlock (A/T)
- Rear Window Defogger Timer Operation
- Combination Light Switch
- Daytime Running Lights
- Fog Lights
- Headlight Auto-OFF Function*
- Turn Signal/Hazard Warning Lights
- Courtesy Light (Driver's side)
- Wiper
- Driver's Power Window Relay
- Keyless Answer Back*
- Security Answer Back*
- Answer Back Response Operation
- Power Door Locks*
- Door Lock Response Operation
- Keyless Entry System*
- Keyless PANIC Operation
- Auto Power Door Locks (LOCK operation)*
- Auto Power Door Locks (UNLOCK operation)*
- Security Alarm System
- Passenger's MICU
- 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 B10A2- Driver's MICU Internal (EEPROM) Error
- DTC B11A2: Passenger's MICU Internal (EEPROM) Error
- DTC B1036: Driver's MICU IG1 Line Input Error
- DTC B11C7: Passenger's MICU IG1 Line Input Error
- DTC U0155: Driver's MICU Lost Communication with Gauge Control Module
- DTC U0155: Passenger's MICU Lost Communication with Gauge Control Module
- DTC U0199: Driver's MICU Lost Communication with Door Multiplex Control Unit
- DTC U1280: Communication bus Line Error (BUS-OFF)
- DTC U1282. Passenger's MICU Lost Communication with Driver's MICU
- DTC U1283: Driver's MICU Lost Communication with Passenger's MICU
- 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.