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) -

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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.

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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.

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U0208 Lost Communication with "Seat Control Module A"

  • Position control ECU and switch assembly branch line or connector

  • Power source circuit of position control ECU and switch assembly

  • Position control ECU and switch assembly ground circuit

  • Position control ECU and switch 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

U0230 Lost Communication with Rear Gate Module

  • Multiplex network door ECU main line or connector

  • Power source circuit of multiplex network door ECU

  • Multiplex network door ECU ground circuit

  • Multiplex network door 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

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)

  • Position control ECU and switch assembly

    (w/ Seat position memory system)

  • Multiplex network door ECU

    (w/ Power back door system)

  • Open or short in No. 5 CAN junction connector

  • Open or short in No. 6 CAN junction connector

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