DTC Troubleshooting: U0100-00, U0122-00, U0131-00, U0151-00
DTC U0100-00: F-CAN Communication With PCM/TCM Malfunction
DTC U0122-00: F-CAN Communication With VSA Modulator-Control Unit Malfunction
DTC U0131-00: F-CAN Communication With EPS Malfunction
DTC U0151-00: F-CAN Communication With SRS Malfunction
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.
These DTC(s) may be stored due to the power/ground circuit failure of the appropriate transmitting control unit. Before this troubleshooting, check the power/ground circuit of the appropriate transmitting control unit first.

DTC Description
DTC
Freeze Frame
U0100-00 F-CAN Communication With PCM/TCM Malfunction
    
U0122-00 F-CAN Communication With VSA Modulator-Control Unit Malfunction
    
U0131-00 F-CAN Communication With EPS Malfunction
    
U0151-00 F-CAN Communication With SRS Malfunction
    

1.
Problem verification:

Problem verification
?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 to the ON mode.

?4.
Wait for 60 seconds or more.

?5.
Check for DTCs with the HDS.
DTC Description
DTC
Freeze Frame
U0100-00 F-CAN Communication With PCM/TCM Malfunction
    
U0122-00 F-CAN Communication With VSA Modulator-Control Unit Malfunction
    
U0131-00 F-CAN Communication With EPS Malfunction
    
U0151-00 F-CAN Communication With SRS Malfunction
    

Is DTC U0100-00, U0122-00, U0131-00, or U0151-00 indicated?

     
YES
     
     
     
The failure is duplicated. Go to step 2.
     
NO
     
     
     
Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the transmitting control units, and adaptive damper control unit. 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.
CAN gateway system DTC check:

CAN gateway system DTC check
?1.
Check for CAN gateway system DTCs with the HDS.
DTC Description
DTC
   

Are any DTCs indicated?

     
YES
     
     
     
     
NO
     
     
     
Go to step 3.
3.
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 adaptive damper control unit Bus channels B?

     
Adaptive damper control unit (Bus B) is Not Available
     
     
     
Go to step 4.
     
Adaptive damper control unit is Available for Bus B
     
     
     
Go to step 5.
4.
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
Adaptive damper control unit 24P connector

?3.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
CAN gateway 16P connector: disconnected
Adaptive damper control unit 24P connector: disconnected

Test point 1
CAN gateway 16P connector (female terminals) No. 6:
Test point 2
Adaptive damper control unit 24P connector No. 19

Test point 1
CAN gateway 16P connector (female terminals) No. 14:
Test point 2
Adaptive damper control unit 24P connector No. 20


Is there 1.0 ? or less?

     
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 or substitute a known-good adaptive damper control unit, then recheck. If the symptom/indication goes away with a known-good adaptive damper control unit, replace the original adaptive damper control unit.?
     
NO
     
     
     
Repair an open in the F-CAN B_H wire and/or the F-CAN B_L wire between the CAN gateway and the adaptive damper control unit.?
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 Gateway
Bus channel(s) at normal
U0100-00
PCM
A, B
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 6.
     
U0100-00: PCM is Not Available for Bus B
     
     
     
Go to step 7.
     
U0122-00: VSA modulator-control unit is Not Available for Bus A
     
     
     
Go to step 6.
     
U0122-00: VSA modulator-control unit is Not Available for Bus B
     
     
     
Go to step 7.
     
U0131-00: EPS control unit is Not Available for Bus B
     
     
     
Go to step 7.
     
U0151-00: SRS unit is Not Available for Bus B
     
     
     
Go to step 7.
6.
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).
NOTE: Before disconnecting the PCM connector, jump the SCS line with the HDS, and wait more than 1 minute.

DTC
Connector
-
CAN gateway 16P connector
U0100-00
PCM connector A (50P)
U0122-00
VSA modulator-control unit 46P 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
U0100-00
F-CAN A_H
CAN gateway 16P connector (female terminals):
No. 3
PCM connector A (50P)
No. 37
F-CAN A_L
No. 11
No. 36
U0122-00
F-CAN A_H
CAN gateway 16P connector (female terminals):
No. 3
VSA modulator-control unit 46P connector
No. 20
F-CAN A_L
No. 11
No. 21


Is there 1.0 ? or less?

     
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.?
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.
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 and/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):

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).
NOTE:
Before disconnecting the SRS unit connector, do the 12 volt battery terminal disconnection procedure and wait for at least 3 minutes.
Before disconnecting the PCM connector, jump the SCS line with the HDS, and wait more than 1 minute.
DTC
Connector
-
CAN gateway 16P 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)

?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 B_H
CAN gateway 16P connector (female terminals):
No. 6
PCM connector A (50P)
No. 39
F-CAN B_L
No. 14
No. 38
U0122-00
F-CAN B_H
CAN gateway 16P connector (female terminals):
No. 6
VSA modulator-control unit 46P connector
No. 24
F-CAN B_L
No. 14
No. 25
U0131-00
F-CAN B_H
CAN gateway 16P connector (female terminals):
No. 6
EPS control unit connector B (6P)
No. 3
F-CAN B_L
No. 14
No. 1
U0151-00
F-CAN B_H
CAN gateway 16P connector (female terminals):
No. 6
SRS unit connector A (39P)
No. 34
F-CAN B_L
No. 14
No. 35


Is there 1.0 ? or less?

     
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.?
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.
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 motor/control unit. Substitute a known-good EPS motor/control unit, then recheck. If DTC U0131-00 goes away and the EPS motor/control unit was substituted, replace the original EPS motor/control unit.
U0151-00
Check for poor connections or loose terminals at the CAN gateway and the SRS unit. Substitute a known-good 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 and/or the F-CAN B_L wire between the transmitting control unit and the CAN gateway.?