DTC Troubleshooting: U0100-00, U0101-00, U0104-00, U0126-00, U0155-00
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
NOTE:

DTC Description
DTC
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.
CAN gateway system DTC check:

CAN gateway system DTC check
?1.
Turn the vehicle to the ON mode.

?2.
Check for CAN gateway system DTCs with the HDS.
DTC Description
DTC
U0029-00 CAN Gateway F-CAN ch A Bus Off
  
U0047-00 CAN Gateway F-CAN ch B Bus Off
  
U3000-49 CAN Gateway Internal Failure
  

Is DTC U0029-00, U0047-00, or U3000-49 indicated?

     
YES
     
     
     
     
NO
     
     
     
Go to step 2.
2.
F-CAN circuit communication check (Receiving control unit):

F-CAN circuit communication check (Receiving control unit)
?1.
Select the FUNCTION TEST in the CAN gateway with the HDS, then select the F-CAN Bus Connected Unit Check.

  

Does the CAN gateway detect the VSA modulator-control unit Bus channels B?

     
Bus B is Not Available
     
     
     
Go to step 3.
     
Bus B is Available
     
     
     
Go to step 4.
3.
Open wire check (F-CAN B_H line, F-CAN B_L line):

Open wire check (F-CAN B_H line, F-CAN B_L line)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Disconnect the following connectors.
CAN gateway 16P connector
VSA modulator-control unit 38P connector

?3.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
CAN gateway 16P connector: disconnected
 
VSA modulator-control unit 38P connector: disconnected
Test point 1
CAN gateway 16P connector (female terminals) No. 6:
Test point 2
VSA modulator-control unit 38P connector No. 38

Test point 1
CAN gateway 16P connector (female terminals) No. 14:
Test point 2
VSA modulator-control unit 38P connector No. 26


Is there continuity?

     
YES
     
     
     
The F-CAN B_H and F-CAN B_L wires are OK. Check for loose terminals and poor connections in the VSA modulator-control unit connector. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting or replace the VSA modulator-control unit.?
     
NO
     
     
     
Repair an open in the F-CAN B_H wire and/or the F-CAN B_L wire between the VSA modulator-control unit and the CAN gateway.?
4.
F-CAN circuit communication check (Transmitting control unit):

F-CAN circuit communication check (Transmitting control unit)
?1.
Select the FUNCTION TEST in the CAN gateway with the HDS, then select the F-CAN Bus Connected Unit Check.

  

?2.
According to the detected DTC on the following table, make sure that the transmitting control unit detects the CAN gateway Bus channel(s) normally.
DTC
Transmitting control unit
Detected CAN gateway Bus channel(s) at normal
U0100-00
PCM
A
U0101-00
PCM
A
U0104-00
Multipurpose camera unit
B
U0126-00
Steering angle sensor
B
U0155-00
Gauge control module
A

Is it detected normally?

     
Detected normal
     
     
     
Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the transmitting control unit and the CAN gateway.?
     
U0100-00: PCM is Not Available for Bus A
     
     
     
Go to step 5.
     
U0101-00: PCM is Not Available for Bus A
     
     
     
Go to step 5.
     
U0104-00: Multipurpose camera unit is Not Available for Bus B
     
     
     
Go to step 6.
     
U0126-00: Steering angle sensor is Not Available for Bus B
     
     
     
Go to step 6.
     
U0155-00: Gauge control module is Not Available for Bus A
     
     
     
Go to step 5.
5.
Open wire check (F-CAN A_H line, F-CAN A_L line):

Open wire check (F-CAN A_H line, F-CAN A_L line)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
According to the detected DTC on the following table, disconnect the transmitting control unit connector(s).
DTC
Connector
-
CAN gateway 16P connector
U0100-00
PCM connector A (51P)
U0101-00
PCM connector A (51P)
U0155-00
Gauge control module connector A (32P)

NOTE: Before disconnecting the PCM connector A (51P), jump the SCS line with the HDS, and wait more than 1 minute.


?3.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
CAN gateway 16P 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 A_H
CAN gateway 16P connector (female terminals):
No. 3
PCM connector A (51P)
No. 2
F-CAN A_L
No. 11
No. 1
U0101-00
F-CAN A_H
CAN gateway 16P connector (female terminals):
No. 3
PCM connector A (51P)
No. 2
F-CAN A_L
No. 11
No. 1
U0155-00
F-CAN A_H
CAN gateway 16P connector (female terminals):
No. 3
Gauge control module 32P connector
No. 21
F-CAN A_L
No. 11
No. 22


Is there continuity?

     
YES
     
     
     
The F-CAN A_H wire and the F-CAN A_L wire 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, substitute or replace the correspond control unit or sensor.?
DTC
Operation for transmitting control unit
U0100-00
Check for loose terminals and poor connections at CAN gateway and the PCM. Substitute a known-good PCM, then recheck. If DTC U0100-00 goes away and the PCM was substituted, replace the original PCM.
U0101-00
Check for loose terminals and poor connections at CAN gateway and the PCM. Substitute a known-good PCM, then recheck. If DTC U0101-00 goes away and the PCM was substituted, replace the original PCM.
U0155-00
Check for loose terminals and poor connections at CAN gateway and the gauge control module. Substitute a known-good gauge control module, then recheck. If DTC U0155-00 goes away and the gauge control module was substituted, replace the original gauge control module.
     
NO
     
     
     
Repair an open in the F-CAN A_H wire and/or the F-CAN A_L wire between the transmitting control unit and the CAN gateway.?
6.
Open wire check (F-CAN B_H line, F-CAN B_L line):

Open wire check (F-CAN B_H line, F-CAN B_L line)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
According to the detected DTC on the following table, disconnect the transmitting control unit connector(s).
DTC
Connector
-
CAN gateway 16P connector
U0104-00
Multipurpose camera unit 20P connector
U0126-00
Steering angle sensor 4P connector

?3.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
CAN gateway 16P 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
U0104-00
F-CAN B_H
CAN gateway 16P connector (female terminals):
No. 6
Multipurpose camera unit 20P connector
No. 2
F-CAN B_L
No. 14
No. 13
U0126-00
F-CAN B_H
CAN gateway 16P connector (female terminals):
No. 6
Steering angle sensor 4P connector (female terminals):
No. 2
F-CAN B_L
No. 14
No. 3



Is there continuity?

     
YES
     
     
     
The F-CAN B_H wire and the F-CAN B_L wire 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, substitute or replace the correspond control unit or sensor.?
DTC
Operation for transmitting control unit
U0104-00
Check for loose terminals and poor connections at CAN gateway and the multipurpose camera unit. Substitute a known-good multipurpose camera unit, then recheck. If DTC U0104-00 goes away and the multipurpose camera unit was substituted, replace the original multipurpose camera unit.
U0126-00
Check for loose terminals and poor connections at CAN gateway and the steering angle sensor. Substitute a known-good steering angle sensor, then recheck. If DTC U0126-00 goes away and the steering angle sensor was substituted, replace the original steering angle sensor.
     
NO
     
     
     
Repair an open in the F-CAN B_H wire and/or the F-CAN B_L wire between the transmitting control unit and the CAN gateway.?