MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION

DTC Code	Description
B1206	P/W Master Switch Communication Stop
B1273	Sliding Roof ECU Communication Stop
B2287	LIN Communication Master Malfunction
B2321	Driver Side Door ECU Communication Stop
B2322	Front Passenger Side Door ECU Communication Stop
B2323	Rear Door RH ECU Communication Stop
B2324	Rear Door LH ECU Communication Stop
B2325	LIN Communication Bus Malfunction
B2424	Headlight Leveling Motor LH Communication Malfunction
B2425	Headlight Leveling Motor RH Communication Malfunction

AFS ECU (HEADLIGHT SWIVEL ECU ASSEMBLY) DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION

DTC Code	Description
B124D	Lost Communication with AFS LIN
B2410	Headlight Swivel Motor LH Communication Malfunction
B2411	Headlight Swivel Motor RH Communication Malfunction
B2432	Lost Communication with Automatic High Beam Sensor

CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) DIAGNOSTIC TROUBLE CODE (DTC) IDENTIFICATION

DTC Code	Description
B2785	Communication Malfunction between ECUs Connected by LIN
B2786	No Response from Steering Lock ECU
B2789	No Response from ID BOX
B278C	Lost Communication with Power Source Control

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.

Safety Warning

Lin Communication System (From 08/2009)