DTC Troubleshooting: U0100-00 (41-01), U0101-00 (41-04), U0122-00 (41-02), U0131-00 (41-09), U0151-00 (41-08)
DTC U0100-00: F-CAN Malfunction (Lost Communication with Powertrain Control Module (PCM))
DTC U0101-00: F-CAN Malfunction (Lost Communication with A/T Control System)
DTC U0122-00: F-CAN Malfunction (Lost Communication with VSA Modulator-Control Unit)
DTC U0131-00: F-CAN Malfunction (Lost Communication with EPS Control Unit)
DTC U0151-00: F-CAN Malfunction (Lost Communication with SRS unit)
NOTE:
Before you troubleshoot, review the general troubleshooting information.
According to the detected DTC(s), check for the power circuit and the ground circuit of the control unit which cannot communicate with the AWD control unit.
Before disconnecting the SRS unit connector, do the 12 volt battery terminal disconnection procedure, and wait for at least 3 minutes.

DTC Description
DTC
Freeze Frame
U0100-00 F-CAN Malfunction (Lost Communication with Powertrain Control Module (PCM))
    
U0101-00 F-CAN Malfunction (Lost Communication with A/T Control System)
    
U0122-00 F-CAN Malfunction (Lost Communication with VSA Modulator-Control Unit)
    
U0131-00 F-CAN Malfunction (Lost Communication with EPS control unit)
    
U0151-00 F-CAN Malfunction (Lost Communication with SRS unit)
    

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, and/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.

  

Which result is indicated?

     
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 12P connector
Real time AWD control unit 24P connector

?3.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
CAN gateway 12P connector: disconnected
 
Real time AWD control unit 24P connector: disconnected
Test point 1
CAN gateway 12P connector (female terminals) No. 12:
Test point 2
AWD control unit 24P connector No. 14

Test point 1
CAN gateway 12P connector (female terminals) No. 5:
Test point 2
AWD control unit 24P connector No. 24


Is there continuity?

     
YES
     
     
     
The F-CAN B_H wire and the F-CAN B_L wire are OK. Check for poor connections or loose terminals at the CAN gateway and the AWD control unit. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good real time AWD control unit, then recheck. If indicated DTC goes away and the AWD control unit was substituted, replace the original real time AWD control unit.?
     
NO
     
     
     
Repair an open in the F-CAN B_H wire or the F-CAN B_L wire between the AWD 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 getaway Bus channel(s) at normal
U0100-00
PCM
A, B
U0101-00
TCM
A
U0122-00
VSA modulator-control unit
A, B
U0131-00
EPS control unit
B
U0151-00
SRS unit
B

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.
     
U0100-00: PCM is Not Available for Bus B
     
     
     
Go to step 6.
     
U0101-00: TCM is Not Available for Bus A
     
     
     
Go to step 5.
     
U0122-00: VSA modulator-control unit 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.
     
U0131-00: EPS control unit is Not Available for Bus B
     
     
     
Go to step 6.
     
U0151-00: SRS unit is Not Available for Bus B
     
     
     
Go to step 6.
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 12P connector
U0100-00
PCM connector A (50P)
U0101-00
TCM 50P connector
U0122-00
VSA modulator-control unit 46P connector

NOTE: Before disconnecting the PCM and TCM connector, jump the SCS line with the HDS, and wait for more than 1 minute.


?3.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
CAN gateway 12P 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 12P connector (female terminals):
No. 3
PCM connector A (50P)
No. 37
F-CAN A_L
No. 9
No. 36
U0101-00
F-CAN A_H
CAN gateway 12P connector (female terminals):
No. 3
TCM 50P connector
No. 3
F-CAN A_L
No. 9
No. 11
U0122-00
F-CAN A_H
CAN gateway 12P connector (female terminals):
No. 3
VSA modulator-control unit 46P connector
No. 40
F-CAN A_L
No. 9
No. 28


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. 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 poor connections or loose terminals at the CAN gateway and the TCM. Substitute a known-good TCM, then recheck. If DTC U0101-00 goes away and the TCM was substituted, replace the original TCM.
U0122-00
Check for poor connections or loose terminals at the CAN gateway and the VSA modulator-control unit. Replace the VSA modulator-control unit.
     
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 12P connector
U0100-00
PCM connector A (50P)
U0122-00
VSA modulator-control unit 46P connector
U0131-00
EPS control unit connector B (6P)
U0151-00
SRS unit connector A (39P)

NOTE: Before disconnecting the PCM connector, jump the SCS line with the HDS, and wait for more than 1 minute.


?3.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
CAN gateway 12P 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 B_H
CAN gateway 12P connector (female terminals):
No. 12
PCM connector A (50P)
No. 39
F-CAN B_L
No. 5
No. 38
U0122-00
F-CAN B_H
CAN gateway 12P connector (female terminals):
No. 12
VSA modulator-control unit 46P connector
No. 46
F-CAN B_L
No. 5
No. 34
U0131-00
F-CAN B_H
CAN gateway 12P connector (female terminals):
No. 12
EPS control unit connector B (6P)
No. 3
F-CAN B_L
No. 5
No. 1
U0151-00
F-CAN B_H
CAN gateway 12P connector (female terminals):
No. 12
SRS unit connector A (39P)
No. 34
F-CAN B_L
No. 5
No. 35


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
U0100-00
Check for poor connections or loose terminals at the CAN gateway and the PCM. Substitute a known-good PCM, then recheck. If DTC U0100-00 goes away and the multipurpose camera unit was substituted, replace the original PCM.
U0122-00
Check for poor connections or loose terminals at the CAN gateway and the VSA modulator-control unit. Replace the VSA modulator-control unit.
U0131-00
Check for poor connections or loose terminals at the CAN gateway and the EPS control unit. Substitute the EPS control unit, then recheck. If DTC U0131-00 goes away and the EPS control unit was substituted, replace the original EPS control unit.
U0151-00
Check for poor connections or loose terminals at the CAN gateway and the SRS unit. Substitute the SRS unit, then recheck. If DTC U0151-00 goes away and the SRS unit was substituted, replace the original SRS 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.?