DTC Troubleshooting: U0100-00
DTC U0100-00: F-CAN Malfunction (EPS Control Unit-PCM)
NOTE: Before you troubleshoot, review the general troubleshooting information.

DTC Description
DTC
Freeze Frame
U0100-00 F-CAN Malfunction (EPS Control Unit-PCM)
    

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 start the engine.

?4.
Check for DTCs with the HDS.
DTC Description
DTC
Freeze Frame
U0100-00 F-CAN Malfunction (EPS Control Unit-PCM)
    

Is DTC U0100-00 indicated?

     
YES
     
     
     
The failure is duplicated. Go to step 2.
     
NO
     
     
     
Intermittent failure, the system is OK at this time. 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.
Open wire check (F-CAN_H, F-CAN_L lines):

Open wire check (F-CAN_H, F-CAN_L lines)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Short the SCS line with the HDS.


?3.
Disconnect the following connectors.
EPS control unit connector B (6P)
PCM connector A (51P)

?4.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
EPS control unit connector B (5P): disconnected
 
PCM connector A (51P): disconnected
Test point 1
EPS control unit connector B (6P) No. 4
Test point 2
PCM connector A (51P) No. 2


Is there continuity?

     
YES
     
     
     
Update the PCM if it does not have the latest software, or substitute a known-good PCM, then go to step 1 and recheck. If the PCM was updated and DTCs are not indicated, troubleshooting is complete. If the PCM was substituted and DTCs are not indicated, replace the original PCM.?
     
NO
     
     
     
Repair an open in the wire between the EPS control unit and the PCM.?