DTC Troubleshooting: U0100
DTC U0100: Power control unit lost communication with PCM
DTC Description
DTC
U0100 Power control unit lost communication with PCM
  

NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A.

1.
Problem verification:

Problem verification
?1.
Turn the vehicle to the ON mode.

?2.
Clear the DTCs with the HDS.


?3.
Turn the vehicle to the OFF (LOCK) mode and then the ON mode.

?4.
Wait for at least 6 seconds.

?5.
Check for DTCs with the HDS.
DTC Description
DTC
U0100 Power control unit lost communication with PCM
  

Is DTC U0100 indicated?

     
YES
     
     
     
Go to step 2.
     
NO
     
     
     
Intermittent failure, the system is OK at this time. Check for loose or poor connections.?
2.
Open wire check (F-CAN lines):

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

?2.
Jump the SCS line with the HDS.


?3.
Disconnect the following connectors.
PCM connector A (51P)
Keyless access control unit connector C (20P)

?4.
Check for continuity between test points 1 and 2 respectively.
Test condition
Vehicle OFF (LOCK) mode
PCM connector A (51P): disconnected
Keyless access control unit connector C (20P): disconnected
Test point 1
Keyless access control unit connector C (20P) No. 12
Test point 2
PCM connector A (51P) No. 1


Is there continuity?

     
YES
     
     
     
The F-CAN wires are OK. Replace the keyless access control unit.?
     
NO
     
     
     
An open or poor connection in the F-CAN wire(s).?