CAN COMMUNICATION SYSTEM DIAGNOSTIC TROUBLE CODE CHART

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.

Sub Bus 1 (Main body ECU (Multiplex network body ECU) Output DTCs (GTS Display: Main Body))
DTC Code Detection Item HINT See page
U0199 Lost Communication with "Door Control Module A" -

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U0200 Lost Communication with "Door Control Module B" -

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U0208 Lost Communication with "Seat Control Module A" -

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U0209 Lost Communication with "Seat Control Module B" -

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U0230 Lost Communication with Rear Gate Module -

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U1002 Lost Communication with Gateway Module (Main Body ECU) -

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U1115 Lost Communication with Tilt and Telescopic Module -

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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.

  • *1: When the vehicle is equipped with both the pre-crash safety system and lane departure alert system, if DTC U023A is output from the combination meter assembly (GTS display: Combination Meter), check that the V bus, sub bus 2 and sub bus 13 are normal by referring to How to Proceed with Troubleshooting before performing inspection for DTC U023A.

Sub Bus 2 (Network Gateway ECU Output DTCs (GTS Display: Gateway))
DTC Code Detection Item HINT See page
U0104 Lost Communication with Driving Support ECU -

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U0233 Lost Communication with Blind Spot Monitor Master Module -

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U1002 Lost Communication with Gateway Module (Network Gateway ECU) -

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U1100 Lost Communication with Seat Belt Control ECU -

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U023A Lost Communication with Front Camera Module *1

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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.

  • When the vehicle is equipped with both the pre-crash safety system and lane departure alert system, the lane departure warning camera is connected to sub bus 13, however, the driving support ECU assembly does not store DTCs indicating a communication error.

Sub Bus 13 (Driving Support ECU Assembly Output DTCs (GTS Display: Pre-Crash 2))
DTC Code Detection Item HINT See page
U0235 Lost Communication with Cruise Control Front Distance Range Sensor -

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U1002 Lost Communication with Gateway Module (Sensor Bus) -

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