CAN COMMUNICATION SYSTEM(w/o Central Gateway ECU) 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" -

Click here

U0200 Lost Communication with "Door Control Module B" -

Click here

U0208 Lost Communication with "Seat Control Module A" -

Click here

U0209 Lost Communication with "Seat Control Module B" -

Click here

U0230 Lost Communication with Rear Gate Module -

Click here

U0265 Lost Communication with Parking Assist Monitor Module -

Click here

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

Click here

U1115 Lost Communication with Tilt and Telescopic Module -

Click here

Tech Tips


  • The power management control ECU stores DTCs when it detects a communication stop or network communication error for ECUs connected to sub bus 11.

  • *1: When the vehicle is equipped with both the dynamic radar cruise control 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 11 and sub bus 13 are normal by referring to How to Proceed with Troubleshooting before performing inspection for DTC U023A.

Sub Bus 11 (Power Management Control ECU Output DTCs (GTS Display: PM1 Gateway))
DTC Code Detection Item HINT See page
U0104 Lost Communication with Driving Support ECU -

Click here

U0233 Lost Communication with Blind Spot Monitor Master Module -

Click here

U023A Lost Communication with Front Camera Module *1

Click here

U1002 Lost Communication with Gateway Module -

Click here

U1100 Lost Communication with Seat Belt Control ECU -

Click here

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 dynamic radar cruise control 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 -

Click here

U1002 Lost Communication with Gateway Module (Sensor Bus) -

Click here

Tech Tips

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

Sub bus 15 (Malfunction of sub bus 15)
DTC Code Detection Item HINT See page
U0100 Lost Communication with ECM / PCM "A" -

Click here

U0129 Lost Communication with Brake System Control Module -

Click here

U0293 Lost Communication with HV ECU -

Click here

Tech Tips

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

Sub bus 15 (Open in sub bus branch, communication stop)
DTC Code Detection Item HINT See page
U0129 Lost Communication with Brake System Control Module -

Click here