Toyota 4Runner: Diagnostic Trouble Code Chart

Toyota 4Runner Service Manual / Power Source / Network / Networking / Lin Communication System / Diagnostic Trouble Code Chart

DIAGNOSTIC TROUBLE CODE CHART

Main Body ECU (Multiplex Network Body ECU)

DTC Code	Detection Item	See page
B1206	P/W Master Switch Communication Stop
B1273	Sliding Roof ECU Communication Stop
B1287	Back Door ECU Communication Stop
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

Power Management Control ECU

DTC Code	Detection Item	See page
B2287	LIN Communication Master Malfunction

Certification ECU (Smart Key ECU Assembly)

DTC Code	Detection Item	See page
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

Multiplex Network Door ECU (Back Door P/W)

DTC Code	Detection Item	See page
B2327	Lost Communication with Back Door Power Window ECU (Abnormal Power Supply)
B2328	Back Door Power Window ECU Communication Malfunction

Drive Monitor Switch

DTC Code	Detection Item	See page
B2661	Lost Communication with Combination Meter
B2662	Lost Communication with Clock/Outside Temperature Display

No Response from Steering Lock ECU (B2786)

DESCRIPTION This DTC is stored when LIN communication between the certification ECU and steering lock actuator assembly (steering lock ECU) stops for 10 seconds or more. DTC Code ...

No Response from ID BOX (B2789)

DESCRIPTION This DTC is stored when LIN communication between the certification ECU and ID code box stops for 10 seconds or more. DTC Code DTC Detection Condition ...

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Problem Symptoms Table
PROBLEM SYMPTOMS TABLE HINT: Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" ...