Toyota 4Runner Quiz
Power Source / Network

Diagnostic Trouble Code Chart

In this manual: Power Source / Network
General — 25Audio / Visual / Telematics — 283Brake — 187Drivetrain — 204Power Source / Network — 79Steering — 76Suspension — 130Vehicle Exterior — 391Vehicle Interior — 693
~1min read
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

Test yourself

A quick Toyota 4Runner quiz: every answer comes with an explanation and a link to the manual page.