DTC Troubleshooting: U0114, U0122, U0128, U0129, U0131, U0155
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 U0155: F-CAN Malfunction (PCM-Gauge Control Module)
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 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
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)
    
U0155 F-CAN Malfunction (PCM-Gauge Control Module)
    

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.

?4.
Turn the vehicle to the ON mode.

?5.
Check for Pending or Confirmed DTCs with the HDS.
DTC Description
Confirmed DTC
Pending DTC
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)
    
U0155 F-CAN Malfunction (PCM-Gauge Control Module)
    

Are any DTCs 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 the PCM. If the on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the on-board snapshot.?
2.
Open wire check (F-CAN_H line, F-CAN_L line):

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

?2.
Disconnect the receiving control unit connector(s).
NOTE: Jump the SCS line with the HDS, and wait more than 1 minute when removing the PCM connector(s).

PCM connector A (51P)

?3.
According to the detected DTC on the following table, disconnect the transmitting control unit connector(s).
DTC
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)
U0155
Gauge control module connector A (32P)

?4.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
Receiving control unit connector(s): disconnected
 
Transmitting control unit connector(s) for indicated DTCs: disconnected

DTC
Circuit name
Receiving control unit
Transmitting control unit
Connector
Terminal
Connector
Terminal
U0114
F-CAN_H
PCM connector A (51P)
No. 2
Real time AWD control unit 24P connector
No. 14
F-CAN_L
No. 1
No. 24
U0122
F-CAN_H
PCM connector A (51P)
No. 2
VSA modulator-control unit 46P connector
No. 40
F-CAN_L
No. 1
No. 28
U0128
F-CAN_H
PCM connector A (51P)
No. 2
VSA modulator-control unit 46P connector
No. 40
F-CAN_L
No. 1
No. 28
U0129
F-CAN_H
PCM connector A (51P)
No. 2
Electric brake booster 26P connector
No. 26
F-CAN_L
No. 1
No. 18
U0131
F-CAN_H
PCM connector A (51P)
No. 2
EPS control unit connector B (6P)
No. 3
F-CAN_L
No. 1
No. 1
U0155
F-CAN_H
PCM connector A (51P)
No. 2
Gauge control module connector A (32P)
No. 19
F-CAN_L
No. 1
No. 20

Is there continuity?

     
YES
     
     
     
The F-CAN_H wire and the F-CAN_L wire are OK.
Refer to the DTC shown on the display, then substitute or replace the control unit based on the instructions (see table).?
     
NO
     
     
     
Repair an open in the F-CAN_H wire or the F-CAN_L wire between the transmitting control unit and the transmitting control unit.?