DTC U0100-00, U0101-00, U0126-00, U0129-00, U0151-00, U0155-00 (VSA Control Unit (Without CAN Gateway)) (2017 2018 2019)

DTC U0100-00  : CAN Communication Failure with ECM/ISU DTC U0101-00  : CAN Communication Failure with PCM/TCM DTC U0126-00  : CAN Communication Failure with Absolute Steering Wheel Angle Sensor DTC U0129-00  : CAN Communication Failure with AHB/ESB/EBB DTC U0151-00  : CAN Communication Failure with SRS DTC U0155-00  : CAN Communication Failure with Meter

NOTE: 

• Before you troubleshoot, review the general troubleshooting information .
• According to the detected DTC (s), check the voltage supply and ground circuit of the control unit which cannot communicate with the VSA modulator-control unit.

DTC (VSA)

1. DTC check

   -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. Test-drive the vehicle at 6 mph (10 km/h) or more.

   NOTE:  Drive the vehicle on the road, not on a lift.

   -5. 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 PCM/TCM
   U0126-00 CAN Communication Failure with Absolute Steering Wheel Angle Sensor
   U0129-00 CAN Communication Failure with AHB/ESB/EBB
   U0151-00 CAN Communication Failure with SRS
   U0155-00 CAN Communication Failure with Meter

   Is DTC indicated?

   YES 

   Go to step 2.

   NO 

   Intermittent failure, the system is OK at this time. 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)

   -1. Turn the vehicle to the OFF (LOCK) mode with driver's door open.

   -2. Wait for 3 minutes.

   NOTE:  Do not close the driver's door.

   -3. Disconnect the following connector.

   VSA modulator-control unit 46P connector

   -4. Disconnect the following connectors according to the detected DTC.

   DTC	Connector
   U0100-00	PCM connector A (51P)
   U0101-00	PCM connector A (51P)
   U0126-00	EPS control unit connector B (6P)
   U0129-00	Electric brake booster 26P connector
   U0151-00	SRS unit connector A (39P)
   U0155-00	Gauge control module connector A (32P)

   NOTE:  Jump the SCS line with the HDS, and wait more than 1 minute when disconnecting the PCM connector.

   -5. Check for continuity between the receiving control unit and the transmitting control unit according to the detected DTC.

   Test condition

   Vehicle OFF (LOCK) mode

   	VSA modulator-control unit 46P connector: disconnected
   	Transmitting control unit connector (s) for indicated DTCs: disconnected

   DTC	Circuit name	Test point 1 (Receiving control unit)		Test point 2 (Transmitting control unit)
   		Connector	Terminal	Connector	Terminal
   U0100-00	F-CAN H	VSA modulator-control unit 46P connector	No. 40	PCM connector A (51P)	No. 2
   	F-CAN L		No. 28		No. 1
   U0101-00	F-CAN H	VSA modulator-control unit 46P connector	No. 40	PCM connector A (51P)	No. 2
   	F-CAN L		No. 28		No. 1
   U0126-00	F-CAN H	VSA modulator-control unit 46P connector	No. 40	EPS control unit connector B (6P)	No. 3
   	F-CAN L		No. 28		No. 1
   U0129-00	F-CAN H	VSA modulator-control unit 46P connector	No. 40	Electric brake booster 26P connector	No. 26
   	F-CAN L		No. 28		No. 18
   U0151-00	F-CAN H	VSA modulator-control unit 46P connector	No. 40	SRS unit connector A (39P)	No. 34
   	F-CAN L		No. 28		No. 35
   U0155-00	F-CAN H	VSA modulator-control unit 46P connector	No. 40	Gauge control module connector A (32P)	No. 19
   	F-CAN L		No. 28		No. 20

   Is there continuity?

   YES 

   The F-CAN H and F-CAN L wires are OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting. According to the detected DTC on the following table, replace the correspond control unit.

   DTC	Transmitting Control Unit
   U0100-00	PCM
   U0101-00	PCM
   U0126-00	EPS motor/control unit
   U0129-00	Electric brake booster
   U0151-00	SRS unit
   U0155-00	Gauge control module

   NO 

   Repair an open in the wire between the receiving control unit and the transmitting control unit.