CAN COMMUNICATION SYSTEM DIAGNOSTIC TROUBLE CODE CHART

Diagnostic Trouble Code Chart
DTC No. Detection Item Trouble Area Note Link
B1003 ECU Malfunction Central gateway ECU (network gateway ECU) -

Click here

U0100 Lost Communication with ECM / PCM "A"

  • Open or short in sub bus 15 main line or connector

  • Open or short in sub bus 15 branch line or connector

  • Power source circuit of hybrid vehicle control ECU assembly

  • Hybrid vehicle control ECU assembly

  • Power source circuit of ECM

  • ECM

  • Open or short in No. 4 CAN junction connector (for RHD)

  • Open or short in No. 8 CAN junction connector (for LHD)

Tech Tips

As there is no sub bus monitor ECU for sub bus 15, each ECU detects communication stops and stores DTCs.

Click here

U0129 Lost Communication with Brake System Control Module

  • Skid control ECU assembly branch line or connector

  • Power source circuit of skid control ECU assembly

  • Skid control ECU assembly ground circuit

  • Skid control ECU assembly

Tech Tips

As there is no sub bus monitor ECU for sub bus 15, each ECU detects communication stops and stores DTCs.

Click here

U0129 Lost Communication with Brake System Control Module

  • Open or short in sub bus 15 main line or connector

  • Open or short in sub bus 15 branch line or connector

  • Power source circuit of hybrid vehicle control ECU assembly

  • Hybrid vehicle control ECU assembly

  • Power source circuit of skid control ECU assembly

  • Skid control ECU assembly

  • Open or short in No. 4 CAN junction connector (for RHD)

  • Open or short in No. 8 CAN junction connector (for LHD)

Tech Tips

As there is no sub bus monitor ECU for sub bus 15, each ECU detects communication stops and stores DTCs.

Click here

U0182 Lost Communication with Lighting Control Module Front

  • No. 1 headlight ECU sub-assembly LH branch line or connector

  • Power source circuit of No. 1 headlight ECU sub-assembly LH

  • No. 1 headlight ECU sub-assembly LH ground circuit

  • No. 1 headlight ECU sub-assembly LH

Tech Tips

The main body ECU (multiplex network body ECU) stores DTCs when it detects a communication stop or network communication error for ECUs connected to sub bus 1.

Click here

U0199 Lost Communication with "Door Control Module A"

  • Outer mirror control ECU assembly (for front passenger side) branch line or connector (for LHD)

  • Power source circuit of outer mirror control ECU assembly (for front passenger side) (for LHD)

  • Outer mirror control ECU assembly (for front passenger side) ground circuit (for LHD)

  • Outer mirror control ECU assembly (for front passenger side) (for LHD)

  • Outer mirror control ECU assembly (for driver side) branch line or connector (for RHD)

  • Power source circuit of outer mirror control ECU assembly (for driver side) (for RHD)

  • Outer mirror control ECU assembly (for driver side) ground circuit (for RHD)

  • Outer mirror control ECU assembly (for driver side) (for RHD)

Tech Tips

The main body ECU (multiplex network body ECU) stores DTCs when it detects a communication stop or network communication error for ECUs connected to sub bus 1.

Click here

U0200 Lost Communication with "Door Control Module B"

  • Outer mirror control ECU assembly (for driver side) branch line or connector (for LHD)

  • Power source circuit of outer mirror control ECU assembly (for driver side) (for LHD)

  • Outer mirror control ECU assembly (for driver side) ground circuit (for LHD)

  • Outer mirror control ECU assembly (for driver side) (for LHD)

  • Outer mirror control ECU assembly (for front passenger side) branch line or connector (for RHD)

  • Power source circuit of outer mirror control ECU assembly (for front passenger side) (for RHD)

  • Outer mirror control ECU assembly (for front passenger side) ground circuit (for RHD)

  • Outer mirror control ECU assembly (for front passenger side) (for RHD)

Tech Tips

The main body ECU (multiplex network body ECU) stores DTCs when it detects a communication stop or network communication error for ECUs connected to sub bus 1.

Click here

U0208 Lost Communication with "Seat Control Module A"

  • Front power seat switch LH branch line or connector (for LHD)

  • Power source circuit of front power seat switch LH (for LHD)

  • Front power seat switch LH ground circuit (for LHD)

  • Front power seat switch LH (for LHD)

  • Front power seat switch RH branch line or connector (for RHD)

  • Power source circuit of front power seat switch RH (for RHD)

  • Front power seat switch RH ground circuit (for RHD)

  • Front power seat switch RH (for RHD)

Tech Tips

The main body ECU (multiplex network body ECU) stores DTCs when it detects a communication stop or network communication error for ECUs connected to sub bus 1.

Click here

U0265 Lost Communication with Parking Assist Monitor Module

  • Rear television camera assembly branch line or connector

  • Power source circuit of rear television camera assembly

  • Rear television camera assembly ground circuit

  • Rear television camera assembly

Tech Tips

The main body ECU (multiplex network body ECU) stores DTCs when it detects a communication stop or network communication error for ECUs connected to sub bus 1.

Click here

U0293 Lost Communication with Hybrid Vehicle Control System

  • Open or short in sub bus 15 main line or connector

  • Open or short in sub bus 15 branch line or connector

  • Power source circuit of ECM

  • ECM

  • Power source circuit of hybrid vehicle control ECU assembly

  • Hybrid vehicle control ECU assembly

  • Power source circuit of skid control ECU assembly

  • Skid control ECU assembly

  • Open or short in No. 4 CAN junction connector (for RHD)

  • Open or short in No. 8 CAN junction connector (for LHD)

Tech Tips

As there is no sub bus monitor ECU for sub bus 15, each ECU detects communication stops and stores DTCs.

Click here

U1002 Lost Communication with Gateway Module (Main Body ECU)

  • Open or short in sub bus 1 main lines or connector

  • Short in sub bus 1 branch lines or connector

  • Main body ECU (multiplex network body ECU)

  • Outer mirror control ECU assembly (for driver side)

    (w/ Seat Position Memory System)

  • Outer mirror control ECU assembly (for front passenger side)

    (w/ Seat Position Memory System)

  • Front power seat switch LH

    (for LHD with Seat Position Memory System)

  • Front power seat switch RH

    (for RHD with Seat Position Memory System)

  • Multiplex tilt and telescopic ECU

    (w/ Power Tilt and Power Telescopic System)

  • No. 1 headlight ECU sub-assembly LH

  • Rear television camera assembly

    (w/ Parking Assist Monitor System without Parallel Parking Assist Function)

  • Open or short in No. 3 CAN junction connector (for LHD)

  • Open or short in No. 4 CAN junction connector (for RHD)

  • Open or short in No. 15 junction connector

  • Open or short in No. 21 CAN junction connector

  • Open or short in junction terminal

Tech Tips

The main body ECU (multiplex network body ECU) stores DTCs when it detects a communication stop or network communication error for ECUs connected to sub bus 1.

Click here

U1115 Lost Communication with Tilt & Telescopic Module

  • Multiplex tilt and telescopic ECU branch line or connector

  • Power source circuit of multiplex tilt and telescopic ECU

  • Multiplex tilt and telescopic ECU ground circuit

  • Multiplex tilt and telescopic ECU

Tech Tips

The main body ECU (multiplex network body ECU) stores DTCs when it detects a communication stop or network communication error for ECUs connected to sub bus 1.

Click here