CAN COMMUNICATION SYSTEM DIAGNOSTIC TROUBLE CODE CHART

Diagnostic Trouble Code Chart
DTC No. Detection Item Trouble Area Note Link
U0104 Lost Communication with Driving Support ECU
  • Driving support ECU assembly branch line or connector

  • Power source circuit of driving support ECU assembly

  • Driving support ECU assembly ground circuit

  • Driving support ECU assembly

Tech Tips

Network gateway ECU stores DTCs when it detects a communication stop or network communication error for ECUs connected to sub bus 2.

Click here

U0129 Lost Communication with Skid Control ECU
  • Open or short in V3 bus main line or connector

  • Open or short in V3 bus branch line or connector

  • Power source circuit of skid control ECU (brake actuator assembly)

  • Skid control ECU (brake actuator assembly)

  • Power source circuit of power steering ECU assembly

  • Power steering ECU assembly

  • Power source circuit of front steering control ECU

  • Front steering control ECU

  • Open or short in No. 7 CAN junction connector

  • Open or short in No. 8 CAN junction connector

  • Open or short in No. 9 CAN junction connector

Tech Tips

As there is no sub bus monitor ECU for V3 bus, each ECU detects communication stops and stores DTCs.

Click here

U0130 Lost Communication with VGRS
  • Open or short in V3 bus main line or connector

  • Open or short in V3 bus branch line or connector

  • Power source circuit of skid control ECU (brake actuator assembly)

  • Skid control ECU (brake actuator assembly)

  • Power source circuit of front steering control ECU

  • Front steering control ECU

  • Power source circuit of absorber control ECU

  • Absorber control ECU

  • Open or short in No. 7 CAN junction connector

  • Open or short in No. 8 CAN junction connector

  • Open or short in No. 9 CAN junction connector

Tech Tips

As there is no sub bus monitor ECU for V3 bus, each ECU detects communication stops and stores DTCs.

Click here

U0130 Lost Communication with VGRS
  • Front steering control ECU branch line or connector

  • Power source circuit of front steering control ECU

  • Front steering control ECU ground circuit

  • Front steering control ECU

Tech Tips

As there is no sub bus monitor ECU for V3 bus, each ECU detects communication stops and stores DTCs.

Click here

U0131 Lost Communication with Power Steering Control Module
  • Open or short in V3 bus main line or connector

  • Open or short in V3 bus branch line or connector

  • Power source circuit of power steering ECU assembly

  • power steering ECU assembly

  • Power source circuit of front steering control ECU

  • Front steering control ECU

  • Open or short in No. 7 CAN junction connector

  • Open or short in No. 8 CAN junction connector

  • Open or short in No. 9 CAN junction connector

Tech Tips

As there is no sub bus monitor ECU for V3 bus, each ECU detects communication stops and stores DTCs.

Click here

U0132 Lost Communication with Suspension Control ECU
  • Absorber control ECU branch line or connector

  • Power source circuit of absorber control ECU

  • Absorber control ECU ground circuit

  • Absorber control ECU

Tech Tips


  • Network gateway ECU stores DTCs when it detects a communication stop or network communication error for ECUs connected to sub bus 2.

  • As there is no sub bus monitor ECU for V3 bus, each ECU detects communication stops and stores DTCs.

Click here

U0199 Lost Communication with "Door Control Module A"
  • Outer mirror control ECU assembly branch line or connector

  • Power source circuit of outer mirror control ECU assembly

  • Outer mirror control ECU assembly ground circuit

  • Outer mirror control ECU assembly

Tech Tips

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 branch line or connector

  • Power source circuit of outer mirror control ECU assembly

  • Outer mirror control ECU assembly ground circuit

  • Outer mirror control ECU assembly

Tech Tips

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 (for LHD) branch line or connector

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

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

  • Front power seat switch LH (for LHD)

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

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

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

  • Front power seat switch RH (for RHD)

Tech Tips

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

U0233 Lost Communication with Blind Spot Monitor Master Module
  • Blind spot monitor sensor LH branch line or connector

  • Power source circuit of blind spot monitor sensor LH

  • Blind spot monitor sensor LH ground circuit

  • Blind spot monitor sensor LH

Tech Tips

Network gateway ECU stores DTCs when it detects a communication stop or network communication error for ECUs connected to sub bus 2.

Click here

U0235 Lost Communication with Cruise Control Front Distance Range Sensor
  • Open or short in sub bus 13 main line or connector

  • Millimeter wave radar sensor assembly

  • Power source circuit of millimeter wave radar sensor assembly

  • Millimeter wave radar sensor assembly ground circuit

Tech Tips

The driving support ECU assembly stores DTCs when it detects a communication stop or network communication error for ECUs connected to sub bus 13.

Click here

U023A Lost Communication with Front Camera Module
  • Lane departure warning camera branch line or connector

  • Power source circuit of lane departure warning camera

  • Lane departure warning camera ground circuit

  • Lane departure warning camera

Tech Tips

Network gateway ECU stores DTCs when it detects a communication stop or network communication error for ECUs connected to sub bus 2.

Click here

U1002 Lost Communication with Gateway Module (Network Gateway ECU)
  • Open or short in sub bus 2 main line or connector

  • Open or short in sub bus 2 branch line or connector

  • Network gateway ECU

  • Absorber control ECU

    (w/ AVS System)

  • Driving support ECU assembly

    (w/ Pre-crash Safety System)

  • Clearance warning ECU assembly

    (w/ LEXUS parking assist-sensor system)

  • Option connector (Bus buffer ECU)

    (w/ Option connector)

  • Lane departure warning camera

    (w/ Lane departure alert system)

  • Blind spot monitor sensor LH

    (w/ Blind spot monitor system)

  • Open or short in No. 3 CAN junction connector

  • Open or short in No. 4 CAN junction connector

  • Open or short in No. 5 CAN junction connector

  • Open or short in No. 6 CAN junction connector

  • Open or short in No. 9 CAN junction connector

  • Open or short in No. 11 CAN junction connector

  • Open or short in No. 2 CAN junction terminal

Tech Tips

The network gateway ECU stores DTCs when it detects a communication stop or network communication error for ECUs connected to sub bus 2.

Click here

U1002 Lost Communication with Gateway Module (Main Body ECU)
  • Open or short in sub bus 1 main line or connector

  • Open or short in sub bus 1 branch line 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

    (w/ Seat position memory system)

    (for LHD)

  • Front power seat switch RH

    (w/ Seat position memory system)

    (for RHD)

  • Multiplex tilt and telescopic ECU

    (w/ Power tilt and power telescopic system)

  • Open or short in No. 3 CAN junction connector

  • Open or short in No. 4 CAN junction connector

  • Open or short in No. 5 CAN junction connector

  • Open or short in No. 6 CAN junction connector

  • Open or short in No. 1 CAN 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

U1002 Lost Communication with Gateway Module (Sensor Bus)
  • Open or short in sub bus 13 main line or connector

  • Driving support ECU assembly

  • Power source circuit of driving support ECU assembly

  • Driving support ECU assembly ground circuit

  • Millimeter wave radar sensor assembly

  • Power source circuit of millimeter wave radar sensor assembly

  • Millimeter wave radar sensor assembly ground circuit

Tech Tips

The driving support ECU assembly stores DTCs when it detects a communication stop or network communication error for ECUs connected to sub bus 13.

Click here

U1110 Lost Communication with Clearance Sonar Module
  • Clearance warning ECU assembly branch line or connector

  • Power source circuit of clearance warning ECU assembly

  • Clearance warning ECU assembly ground circuit

  • Clearance warning ECU assembly

Tech Tips

Network gateway ECU stores DTCs when it detects a communication stop or network communication error for ECUs connected to sub bus 2.

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

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

U1117 Lost Communication with Accessory Gateway
  • Option connector (Bus buffer ECU) branch line or connector

  • Option Connector (bus buffer ECU)

Tech Tips

Network gateway ECU stores DTCs when it detects a communication stop or network communication error for ECUs connected to sub bus 2.

Click here