DTC Troubleshooting: U0100-00, U0101-00, U0122-00, U0126-00, U0131-00, U0155-00
DTC U0100-00: Lost Communication With The PCM (PGM-FI System)
DTC U0101-00: Lost Communication With The PCM/TCM
DTC U0122-00: Lost Communication With The VSA Modulator-Control Unit
DTC U0126-00: Lost Communication With The Steering Angle Sensor
DTC U0131-00: Lost Communication With The EPS Control Unit
DTC U0155-00: Lost Communication With The Gauge Control Module
NOTE:
Before you troubleshoot, review the general troubleshooting information.
Refer to the DTC code shown on the display, and then inspect the connectors and terminals based on the instructions in the table below.
According to the detected DTC(s), check for the power circuit and the ground circuit of the control unit which cannot communicate with the multipurpose camera unit.

DTC Description
DTC
Freeze Frame
U0100-00 Lost Communication With The PCM (PGM-FI System)
    
U0101-00 Lost Communication With The PCM/TCM
    
U0122-00 Lost Communication With The VSA Modulator-Control Unit
    
U0126-00 Lost Communication With The Steering Angle Sensor
    
U0131-00 Lost Communication With The EPS Control Unit
    
U0155-00 Lost Communication With The Gauge Control Module
    

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 multipurpose camera unit detect the CAN gateway 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
Multipurpose camera unit 20P connector

?3.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
CAN gateway 16P connector: disconnected
 
Multipurpose camera unit 20P connector: disconnected
Test point 1
CAN gateway 16P connector (female terminals) No. 6:
Test point 2
Multipurpose camera unit 20P connector No. 2

Test point 1
CAN gateway 16P connector (female terminals) No. 14:
Test point 2
Multipurpose camera unit 20P connector No. 13


Is there continuity?

     
YES
     
     
     
Check for poor connections or loose terminals at the CAN gateway and the multipurpose camera unit. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting. If they are OK, replace the multipurpose camera unit.?
     
NO
     
     
     
Repair an open in the F-CAN B_H wire or the F-CAN B_L wire between the multipurpose camera 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
U0122-00
VSA modulator-control unit
B
U0126-00
Steering angle sensor
B
U0131-00
EPS control unit
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.
     
U0122-00: VSA modulator-control 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.
     
U0131-00: EPS control unit 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 32P connector

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) (female terminals)
Test point 2 (Transmitting control unit)
Connector
Terminal
Connector
Terminal
U0100-00
F-CAN A_H
CAN gateway 16P connector:
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:
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:
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.
According to the detected DTC on the following table, substitute, or replace the correspond control unit.?
DTC
Operation for transmitting control unit
U0100-00
Check for poor connections or loose terminals at the CAN gateway and the PCM. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM, then recheck. If they are OK, replace the original PCM.?
U0101-00
Check for poor connections or loose terminals at the CAN gateway and the PCM. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM, then recheck. If they are OK, replace the original PCM.?
U0155-00
Check for poor connections or loose terminals at the CAN gateway and the gauge control module. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good gauge control module, then recheck. If they are OK, replace the original gauge control module.?
     
NO
     
     
     
Repair an open in the F-CAN A_H wire 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
U0122-00
VSA modulator-control unit 38P connector
U0126-00
Steering angle sensor 4P connector
U0131-00
EPS control unit connector B (6P)

?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) (female terminals)
Test point 2 (Transmitting control unit)
Connector
Terminal
Connector
Terminal
U0122-00
F-CAN B_H
CAN gateway 16P connector:
No. 6
VSA modulator-control unit 38P connector
No. 38
F-CAN B_L
No. 14
No. 26
U0126-00
F-CAN B_H
CAN gateway 16P connector:
No. 6
Steering angle sensor 4P connector:
No. 2
F-CAN B_L
No. 14
No. 3
U0131-00
F-CAN B_H
CAN gateway 16P connector:
No. 6
EPS control unit connector B (6P)
No. 4
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.
According to the detected DTC on the following table, substitute, or replace the correspond control unit.?
DTC
Operation for transmitting control unit
U0122-00
Check for poor connections or loose terminals at the CAN gateway and the VSA modulator-control unit. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting. If they are OK, replace the VSA modulator-control unit.?
U0126-00
Check for poor connections or loose terminals at the CAN gateway and the steering angle sensor. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good steering angle sensor, then recheck. If they are OK, replace the original steering angle sensor.?
U0131-00
Check for poor connections or loose terminals at the CAN gateway and the EPS control unit. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good EPS control unit, then recheck. If they are OK, replace original the EPS control unit.?
     
NO
     
     
     
Repair an open in the F-CAN B_H wire or the F-CAN B_L wire between the transmitting control unit and the CAN gateway.?