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 MANUALSCHEVROLET2008HHR LT, 2.4 P, AUTOMATICREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 184 (MULTIPLEX INTEGRATED CONTROL SYSTEM)
2008 Chevrolet HHR LT, 2.4 P, Automatic
Section 184 (Multiplex Integrated Control System)
2008 Chevrolet HHR LT, 2.4 P, AutomaticSECTION Section 184 (Multiplex Integrated Control System)
WARNING: This page is about a different car, the 2011 Honda Insight and 2010 Honda Insight. 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
- Power Supply Voltage Monitoring Function
- Turn Signal/Hazard Warning Light
- Entry Light*
- Cargo Area Light
- Daytime Running Lights
- Windshield Wiper/Washer (Normally operation)
- Rear Window Wiper/Washer (Normally operation)
- Windshield Wiper/Washer (Vehicle Speed Sense)
- Rear Window Wiper/Washer (With reverse linked rear wiper)
- Windshield/Rear Window Washer
- Power Window Timer (Key-off operation)
- Collision Detection Signal (CDS)
- Power Door Locks*
- Door Lock Response Operation*
- Keyless Entry System*
- Key-in Reminder
- Key Interlock
- Security Alarm System*
- Security Answer Back*
- Answer Back Response Operation*
- Hatch Outer Handle Switch Operation
- Auto Door Lock*
- Auto Door Unlock*
- Keyless Panic Function
- 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 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 B1200: Communication Circuit Error (BUS-OFF)
- DTC B1750: Communication Circuit Error (BUS-OFF)
- DTC B1900: Communication Circuit Error (BUS-OFF)
- U1280: Communication bus Line Error (BUS-OFF) ('11 model)
- 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.