DTC Troubleshooting: U0101, U0104, U0114, U0122, U0128, U0129, U0131, U0151, U0155, U129E
DTC U0101: F-CAN Malfunction (PCM-TCM)
DTC U0104: F-CAN Malfunction (PCM-Driving Support System Control Unit)
DTC U0114: F-CAN Malfunction (PCM-AWD Control Unit)
DTC U0122: F-CAN Malfunction (PCM-VSA Modulator-Control Unit)
DTC U0128: F-CAN Malfunction (PCM-Electric Parking Brake Control Unit)
DTC U0129: F-CAN Malfunction (PCM-Electric Brake Booster)
DTC U0131: F-CAN Malfunction (PCM-EPS Control Unit)
DTC U0151: F-CAN Malfunction (PCM-SRS Unit)
DTC U0155: F-CAN Malfunction (PCM-Gauge Control Module)
DTC U129E: F-CAN Malfunction (PCM-Power Control Unit (PCU))
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 PCM.
Before disconnecting the SRS unit connector, do the 12 volt battery terminal disconnection procedure, and wait for at least 3 minutes.
Before disconnecting the TCM connector, jump the SCS line with the HDS, and wait more than 1 minute.
Before disconnecting the electric brake booster connector, turn the vehicle to the OFF (LOCK) mode with driver's door open, then wait 3 minutes. Do not open and close the driver's door.

DTC Description
Confirmed DTC
Pending DTC
U0101 F-CAN Malfunction (PCM-TCM)
    
U0104 F-CAN Malfunction (PCM-Driving Support System Control Unit)
    
U0114 F-CAN Malfunction (PCM-AWD Control Unit)
    
U0122 F-CAN Malfunction (PCM-VSA Control Module Unit)
    
U0128 F-CAN Malfunction (PCM-Electric Parking Brake Control Unit)
    
U0129 F-CAN Malfunction (PCM-Electric Brake Booster)
    
U0131 F-CAN Malfunction (PCM-EPS Control Unit)
    
U0151 F-CAN Malfunction (PCM-SRS Unit)
    
U0155 F-CAN Malfunction (PCM-Gauge Control Module)
    
U129E F-CAN Malfunction (PCM-Power Control Unit (PCU))
    

1.
CAN gateway system DTC check:

CAN gateway system DTC check
?1.
Turn the vehicle to the ON mode, and wait 6 seconds.

?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 A is Not Available
     
     
     
Go to step 3.
     
Bus B is Not Available
     
     
     
Go to step 4.
     
Bus A and B are Available
     
     
     
Go to step 5.
3.
Open wire check (F-CAN A_H line, F-CAN A_L line) 1:

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

?2.
Jump the SCS line with the HDS, and wait more than 1 minute.


?3.
Disconnect the following connectors.
CAN gateway 12P connector
PCM connector A (50P)

?4.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
CAN gateway 12P connector: disconnected
 
PCM connector A (50P): disconnected
Test point 1
CAN gateway 12P connector (female terminal) No. 3:
Test point 2
PCM connector A (50P) No. 37

Test point 1
CAN gateway 12P connector (female terminal) No. 9:
Test point 2
PCM connector A (50P) No. 36


Is there continuity?

     
YES
     
     
     
The F-CAN A_H wire and the F-CAN A_L wire are OK. 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.?
     
NO
     
     
     
Repair an open in the F-CAN A_H wire or the F-CAN A_L wire between the PCM (A36, A37) and the CAN gateway.?
4.
Open wire check (F-CAN B_H line, F-CAN B_L line) 1:

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

?2.
Jump the SCS line with the HDS, and wait more than 1 minute.


?3.
Disconnect the following connectors.
CAN gateway 12P connector
PCM connector A (50P)

?4.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
CAN gateway 12P connector: disconnected
 
PCM connector A (50P): disconnected
Test point 1
CAN gateway 12P connector (female terminal) No. 12:
Test point 2
PCM connector A (50P) No. 39

Test point 1
CAN gateway 12P connector (female terminal) No. 5:
Test point 2
PCM connector A (50P) No. 38


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 PCM. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM.?
     
NO
     
     
     
Repair an open in the F-CAN B_H wire or the F-CAN B_L wire between the PCM (A38, A39) and the CAN gateway.?
5.
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
U0101
TCM
A
U0104
Millimeter wave radar
B
U0114
Real time AWD control unit
B
U0122
VSA modulator-control unit
A, B
U0128
VSA modulator-control unit (electric parking brake control unit)
A, B
U0129
Electric brake booster
A, B
U0131
EPS control unit
B
U0151
SRS unit
B
U0155
Gauge control module
A
U129E
Body 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.?
     
U0101: TCM is Not Available for Bus A
     
     
     
Go to step 6.
     
U0104: Millimeter wave radar is Not Available for Bus B
     
     
     
Go to step 7.
     
U0114: Real time AWD control unit is Not Available for Bus B
     
     
     
Go to step 7.
     
U0122: VSA modulator-control unit is Not Available for Bus A
     
     
     
Go to step 6.
     
U0122: VSA modulator-control unit is Not Available for Bus B
     
     
     
Go to step 7.
     
U0128: VSA modulator-control unit (electric parking brake control unit) is Not Available for Bus A
     
     
     
Go to step 6.
     
U0128: VSA modulator-control unit (electric parking brake control unit) is Not Available for Bus B
     
     
     
Go to step 7.
     
U0129: Electric brake booster is Not Available for Bus A
     
     
     
Go to step 6.
     
U0129: Electric brake booster is Not Available for Bus B
     
     
     
Go to step 7.
     
U0131: EPS control unit connector is Not Available for Bus B
     
     
     
Go to step 7.
     
U0151: SRS unit connector is Not Available for Bus B
     
     
     
Go to step 7.
     
U0155: Gauge control module is Not Available for Bus A
     
     
     
Go to step 6.
     
U129E: Body control module is Not Available for Bus A
     
     
     
Go to step 6.
6.
Open wire check (F-CAN A_H line, F-CAN A_L line) 2:

Open wire check (F-CAN A_H line, F-CAN A_L line) 2
?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
U0101
TCM 50P connector
U0122
VSA modulator-control unit 46P connector
U0128
VSA modulator-control unit 46P connector
U0129
Electric brake booster 26P connector
U0155
Gauge control module connector A (32P)
U129E
Body control module connector B (36P)

?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
U0101
F-CAN A_H
CAN gateway 12P connector (female terminal) :
No. 3
TCM 50P connector
No. 3
F-CAN A_L
No. 9
No. 11
U0122
F-CAN A_H
CAN gateway 12P connector (female terminal) :
No. 3
VSA modulator-control unit 46P connector
No. 40
F-CAN A_L
No. 9
No. 28
U0128
F-CAN A_H
CAN gateway 12P connector (female terminal) :
No. 3
VSA modulator-control unit 46P connector
No. 40
F-CAN A_L
No. 9
No. 28
U0129
F-CAN A_H
CAN gateway 12P connector (female terminal) :
No. 3
Electric brake booster 26P connector
No. 26
F-CAN A_L
No. 9
No. 18
U0155
F-CAN A_H
CAN gateway 12P connector (female terminal) :
No. 3
Gauge control module connector A (32P)
No. 19
F-CAN A_L
No. 9
No. 20
U129E
F-CAN A_H
CAN gateway 12P connector (female terminal) :
No. 3
Body control module connector B (36P)
No. 22
F-CAN A_L
No. 9
No. 23


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, update, substitute, or replace the correspond control unit.?
DTC
Operation for transmitting control unit
U0101
Check for poor connections or loose terminals at the CAN gateway and the TCM. Substitute a known-good TCM.
U0122
Check for poor connections or loose terminals at the CAN gateway and the electric brake booster. Substitute a known-good VSA modulator-control unit.
U0128
Check for poor connections or loose terminals at the CAN gateway and the electric brake booster. Substitute a known-good VSA modulator-control unit.
U0129
Check for poor connections or loose terminals at the CAN gateway and the electric brake booster. Replace the electric brake booster.
U0155
Check for poor connections or loose terminals at the CAN gateway and the gauge control module. Substitute a known-good gauge control module.
U129E
Check for poor connections or loose terminals at the CAN gateway and the body control module. Substitute a known-good body 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.?
7.
Open wire check (F-CAN B_H line, F-CAN B_L line) 2:

Open wire check (F-CAN B_H line, F-CAN B_L line) 2
?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
U0104
Millimeter wave radar 8P connector
U0114
Real time AWD control unit 24P connector
U0122
VSA modulator-control unit 46P connector
U0128
VSA modulator-control unit 46P connector
U0129
Electric brake booster 26P connector
U0131
EPS control unit connector B (6P)
U0151
SRS unit connector A (39P)

?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
U0104
F-CAN B_H
CAN gateway 12P connector (female terminal) :
No. 12
Millimeter wave radar 8P connector
No. 7
F-CAN B_L
No. 5
No. 6
U0114
F-CAN B_H
CAN gateway 12P connector (female terminal) :
No. 12
Real time AWD control unit 24P connector
No. 14
F-CAN B_L
No. 5
No. 24
U0122
F-CAN B_H
CAN gateway 12P connector (female terminal) :
No. 12
VSA modulator-control unit 46P connector
No. 46
F-CAN B_L
No. 5
No. 34
U0128
F-CAN B_H
CAN gateway 12P connector (female terminal) :
No. 12
VSA modulator-control unit 46P connector
No. 46
F-CAN B_L
No. 5
No. 34
U0129
F-CAN B_H
CAN gateway 12P connector (female terminal) :
No. 12
Electric brake booster 26P connector
No. 19
F-CAN B_L
No. 5
No. 12
U0131
F-CAN B_H
CAN gateway 12P connector (female terminal) :
No. 12
EPS control unit connector B (6P)
No. 3
F-CAN B_L
No. 5
No. 1
U0151
F-CAN B_H
CAN gateway 12P connector (female terminal) :
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, update, substitute, or replace the correspond control unit.?
DTC
Operation for transmitting control unit
U0104
Check for poor connections or loose terminals at the CAN gateway and the millimeter wave radar. Substitute a known-good millimeter wave radar.
U0114
Check for poor connections or loose terminals at the CAN gateway and the AWD control unit. Substitute a known-good AWD control unit.
U0122
Check for poor connections or loose terminals at the CAN gateway and the VSA modulator-control unit. Replace the VSA modulator-control unit.
U0128
Check for poor connections or loose terminals at the CAN gateway and the VSA modulator-control unit. Replace the VSA modulator-control unit.
U0129
Check for poor connections or loose terminals at the CAN gateway and the electric brake booster. Replace the electric brake booster.
U0131
Check for poor connections or loose terminals at the CAN gateway and the EPS control unit. Substitute a known-good EPS control unit.
U0151
Check for poor connections or loose terminals at the CAN gateway and the SRS unit. Substitute a known-good 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.?