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Diagnostic Trouble Code Chart

  1. MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) DIAGNOSTIC TROUBLE CODE 
    MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

    DTC Code Detection Item Trouble Area See
    B1206 P/W Master Switch Communication Stop 1. Multiplex network master switch assembly
    2. Main body ECU (multiplex network body ECU)
    3. Instrument panel junction block assembly
    4. Wire harness or connector
    5. D FR DOOR fuse    		 Refer to DTC B1206: P/W Master Switch Communication Stop
    B1273
    *1    		 Sliding Roof ECU Communication Stop 1. Sliding roof ECU (sliding roof drive gear sub-assembly)
    2. Main body ECU (multiplex network body ECU)
    3. Instrument panel junction block assembly
    4. Wire harness or connector
    5. S/ROOF fuse    		 Refer to DTC B1273: Sliding Roof ECU Communication Stop
    B2321 Driver Side Door ECU Communication Stop 1. Power window regulator motor assembly (for driver side)
    2. Main body ECU (multiplex network body ECU)
    3. Multiplex network master switch assembly
    4. Wire harness or connector
    5. D FR DOOR fuse    		 Refer to DTC B2321: Driver Side Door ECU Communication Stop
    B2322 Front Passenger Side Door ECU Communication Stop 1. Power window regulator motor assembly (for front passenger side)
    2. Main body ECU (multiplex network body ECU)
    3. Instrument panel junction block assembly
    4. Wire harness or connector
    5. P FR DOOR fuse    		 Refer to DTC B2322: Front Passenger Side Door ECU Communication Stop
    B2323 Rear Door RH ECU Communication Stop 1. Power window regulator motor assembly (for rear RH side)
    2. Main body ECU (multiplex network body ECU)
    3. Instrument panel junction block assembly
    4. Wire harness or connector
    5. DOOR RR fuse    		 Refer to DTC B2323: Rear Door RH ECU Communication Stop
    B2324 Rear Door LH ECU Communication Stop 1. Power window regulator motor assembly (for rear LH side)
    2. Main body ECU (multiplex network body ECU)
    3. Instrument panel junction block assembly
    4. Wire harness or connector
    5. DOOR RL fuse    		 Refer to DTC B2324: Rear Door LH ECU Communication Stop
    B2325 LIN Communication Bus Malfunction 1. Power window regulator motor assembly (for driver side)
    2. Power window regulator motor assembly (for front passenger side)
    3. Power window regulator motor assembly (for rear RH side)
    4. Power window regulator motor assembly (for rear LH side)
    5. Multiplex network master switch assembly
    6. Sliding roof ECU (sliding roof drive gear sub-assembly)*1
    7. Main body ECU (multiplex network body ECU)
    8. Instrument panel junction block assembly
    9. Wire harness or connector    		 Refer to DTC B2325: LIN Communication Bus Malfunction
    • *1: w/ Moonroof with Solar Panel
  2. CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) DIAGNOSTIC TROUBLE CODE 
    CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

    DTC Code Detection Item Trouble Area See
    B2785 Communication Malfunction between ECUs Connected by LIN 1. Certification ECU (smart key ECU assembly)
    2. Power management control ECU
    3. Transmission control ECU assembly
    4. ID code box (immobilizer code ECU)*3
    5. Wire harness or connector    		 Refer to DTC B2785: Communication Malfunction between ECUs Connected by LIN
    B2786
    *2    		 No Response from Steering Lock ECU 1. Transmission control ECU assembly
    2. Certification ECU (smart key ECU assembly)
    3. Wire harness or connector
    4. P CON MAIN fuse    		 Refer to DTC B2786: No Response from Steering Lock ECU
    B2789
    *3    		 No Response from ID BOX 1. ID code box (immobilizer code ECU)
    2. Certification ECU (smart key ECU assembly)
    3. Wire harness or connector
    4. ECU-B2 fuse    		 Refer to DTC B2789: No Response from ID BOX
    B278C Lost Communication with Power Source Control 1. Power management control ECU
    2. Certification ECU (smart key ECU assembly)
    3. Wire harness or connector
    4. AM2 fuse    		 Refer to DTC B278C: Lost Communication with Power Source Control
    • *2: Although "No Response from Steering Lock ECU" is displayed on the tester, this message is shown if the certification ECU (smart key ECU assembly) cannot communicate with the transmission control ECU assembly.
    • *3: for Canada
  3. POWER MANAGEMENT CONTROL ECU DIAGNOSTIC TROUBLE CODE 
    POWER MANAGEMENT CONTROL ECU

    DTC Code Detection Item Trouble Area See
    B2287 LIN Communication Master Malfunction 1. Power management control ECU
    2. Certification ECU (smart key ECU assembly)
    3. Wire harness or connector    		 Refer to DTC B2287: LIN Communication Master Malfunction
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