DTC U0100-00: CAN Communication Failure With ECM/ISU DTC U0101-00: CAN Communication Failure With TCM DTC U0104-00: CAN Communication Failure with Driving Support System Control Unit DTC U0126-00: CAN Communication Failure With Absolute Steering Wheel Angle Sensor DTC U0155-00: CAN Communication Failure With METER
If more than one DTC codes are listed in Troubleshooting, refer to relevant information only.
The DTC may be stored due to loss of voltage supply or ground at the transmitting control unit. Verify voltage supply and ground are OK on the control unit related to the specific code before following this troubleshooting.
DTC Description
DTC
Freeze Frame
U0100-00 CAN Communication Failure with ECM/ISU
U0101-00 CAN Communication Failure with TCM
U0104-00 CAN Communication Failure with Driving Support System Control Unit
U0126-00 CAN Communication Failure with Absolute Steering Wheel Angle Sensor
U0155-00 CAN Communication Failure with METER
1.
Problem verification:
Problem verification
?1.
Turn the vehicle to the ON mode.
?2.
Clear the DTC with the HDS.
?3.
Turn the vehicle to the OFF (LOCK) mode, then start the engine.
?4.
Check for DTCs with the HDS.
DTC Description
DTC
Freeze Frame
U0100-00 CAN Communication Failure with ECM/ISU
U0101-00 CAN Communication Failure with TCM
U0104-00 CAN Communication Failure with Driving Support System Control Unit
U0126-00 CAN Communication Failure with Absolute Steering Wheel Angle Sensor
U0155-00 CAN Communication Failure with METER
Is any of DTC indicated?
YES
Go to step 2.
NO
Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the transmitting control units, and VSA modulator-control unit. Refer to intermittent failures troubleshooting. If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the Freeze data/on-board snapshot.?
2.
Open wire check (F-CAN_H, F-CAN_L lines):
Open wire check (F-CAN_H, F-CAN_L lines)
?1.
Turn the vehicle to the OFF (LOCK) mode.
?2.
Disconnect the following connector.
VSA modulator-control unit 38P connector
?3.
Disconnect the transmitting control unit connectors. (Refer to the DTC code shown on the display, and then disconnect the connector(s) based on the instructions in the table below.)
NOTE:
Always short the SCS line with the HDS before removing PCM connector(s).
Jump the SCS line with the HDS, and wait more than 1 minute.
PCM connector A (51P)
Multipurpose camera unit 20P connector
Steering angle sensor 4P connector
Gauge control module connector A (32P)
?4.
Check for continuity between the receiving control unit and the transmitting control unit on the F-CAN_H circuit and the F-CAN_L circuit as specified in the table while in the vehicle OFF mode.
The F-CAN_L and F-CAN_H wires are OK at this time, replace the transmitting control unit.? (Refer to the DTC code shown on the display, and then replace the control unit based on the instructions in the table below.)
