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Diagnostic Trouble Code Chart

WARNING: This page is about a different car, the 2008 Toyota Avalon. However, it is still accessible from the selected car via links, so may be relevant.

If a trouble code is displayed during DTC check, check the circuit corresponding to the code in the table below. Proceed to the information for the circuit.

MULTIPLEX COMMUNICATION SYSTEM 

DIAGNOSTIC TROUBLE CODE CHART

DTC Code Detection Item Trouble Area
B1200  MPX Body ECU Stop
  1. Body ECU
  2. Wire harness
B1207  Certification ECU Communication Malfunction
  1. Certification ECU
  2. Wire harness
B1208  Passenger Side Outer Mirror ECU
  1. Memory mirror ECU (RH)
  2. Wire harness
B1209  Driver Side Outer Mirror
  1. Memory mirror ECU (LH)
  2. Wire harness
B1210  Power ECU Stop
  1. Power source control ECU
  2. Wire harness
B1214  Short to B+ in Door System Communication Bus Malfunction
  1. ECUs
  2. Wire harness
B1215  Short to GND in Door System Communication Bus Malfunction
  1. ECUs
  2. Wire harness
B1248  AVC-LAN Communication Impossible
  1. AVC-LAN (radio receiver assembly or multi-display assembly)
  2. Wire harness
B1262  A/C ECU Communication Stop
  1. A/C ECU
  2. Wire harness
B1271  Combination Meter ECU Communication Stop
  1. Combination meter ECU
  2. Wire harness
B1272  Power Seat ECU Communication Stop
  1. Driver seat ECU (Power seat ECU)
  2. Wire harness
B1275  Accessory Bus Buffer Communication Stop
  1. Option connector (BEAN bus buffer)
  2. Wire harness
B1278  Combination Switch ECU Communication Stop
  1. Combination switch
  2. Wire harness
B1279  Rain Sensor Communication Stop(1)
  1. Rain sensor
  2. Wire harness
B1296  Front Light ECU Communication Stop
  1. Front controller
  2. Wire harness
B1243  GSW Terminal Circuit Malfunction
  1. Airbag sensor assembly
  2. Wire harness
  3. Body ECU
(1) w/ Auto Wiper System

When DTCs indicating "+B or GND short malfunction of communication bus" (B1214, B1215, etc.) are detected at the same time as DTCs indicating "communication stop" (B1200, B1207, etc.), repair DTCs indicating "+B or GND short malfunction of communication bus" first.

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