DTC U0114, U0122, U0128, U0129, U0131, U0155 (PGM-FI System (2.4 L Engine)) (2017 2018 2019)

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 (PGM-FI)

1. 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)

   -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).

   DTC	Operation for transmitting control unit
   U0114	Substitute a known-good AWD control unit .
   U0122	Replace the VSA modulator-control unit .
   U0128	Replace the VSA modulator-control unit .
   U0129	Substitute a known-good electric brake booster .
   U0131	Substitute a known-good EPS control unit .
   U0155	Substitute a known-good gauge control module .

   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.