DTC Troubleshooting: U0100, U0101, U0122, U0128, U0131, U0132, U0151
DTC U0100: Gauge Control Module Lost Communication with ENG/AT
DTC U0101: Gauge Control Module Lost Communication with AT
DTC U0122: Gauge Control Module Lost Communication with VSA Modulator-Control Unit
DTC U0128: Gauge Control Module Lost Communication with EPB
DTC U0131: Gauge Control Module Lost Communication with EPS Unit
DTC U0132: Gauge Control Module Lost Communication with Adaptive Damper Control Unit
DTC U0151: Gauge Control Module Lost Communication with SRS Unit
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 gauge control module.
Refer to the DTC shown on the display, then inspect the connectors and terminals based on the instructions.

DTC Description
DTC
U0100 Gauge Control Module Lost Communication with ENG/AT
  
U0101 Gauge Control Module Lost Communication with AT
  
U0122 Gauge Control Module Lost Communication with VSA Modulator-Control Unit
  
U0128 Gauge Control Module Lost Communication with EPB
  
U0131 Gauge Control Module Lost Communication with EPS Unit
  
U0132 Gauge Control Module Lost Communication with Adaptive Damper Control Unit
  
U0151 Gauge Control Module Lost Communication with SRS Unit
  

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 and then the ON mode.

?4.
Check for DTCs with the HDS.
DTC Description
DTC
U0100 Gauge Control Module Lost Communication with ENG/AT
  
U0101 Gauge Control Module Lost Communication with AT
  
U0122 Gauge Control Module Lost Communication with VSA Modulator-Control Unit
  
U0128 Gauge Control Module Lost Communication with EPB
  
U0131 Gauge Control Module Lost Communication with EPS Unit
  
U0132 Gauge Control Module Lost Communication with Adaptive Damper Control Unit
  
U0151 Gauge Control Module Lost Communication with SRS Unit
  

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 gauge control module.?
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.
Gauge control module connector A (32P)

?3.
Disconnect the transmitting control unit connector(s).
Refer to the DTC shown on the display, then disconnect the connector(s) based on the instructions (see table).

U0100: Jump the SCS line with the HDS, and wait more than 1 minute.

U0151: Do the 12 volt battery terminal disconnection procedure, and wait for at least 3 minutes.

DTC
Connector
U0100
PCM connector A (50P)*1/*3
PCM connector No.2 (58P)*2
U0101
TCM 50P connector
U0122
U0128
VSA modulator-control unit 46P connector
U0131
EPS control unit connector B (6P)
U0132
Adaptive damper control unit 24P connector
U0151
SRS unit connector A (39P)
*1: L15B7/L15BA/L15BY engine
*2: K20C1 engine
*3: K20C2 engine

?4.
Check for continuity between the receiving control unit and the transmitting control unit on the F-CAN_H circuit and the F-CAN_L circuit.
Test condition
Vehicle OFF (LOCK) mode
Gauge control module connector A (32P): disconnected
Transmitting control unit connector(s) for indicated DTCs: disconnected

DTC
Circuit name
Receiving control unit
Transmitting control unit
Connector
Terminal
Connector
Terminal
U0100*1/*3
F-CAN_H
Gauge control module connector A (32P)
No. 19
PCM connector A (50P)
No. 37
F-CAN_L
No. 20
No. 36
U0100*2
F-CAN_H
Gauge control module connector A (32P)
No. 19
PCM connector No.2 (58P)
No. 15
F-CAN_L
No. 20
No. 27
U0101
F-CAN_H
Gauge control module connector A (32P)
No. 19
TCM 50P connector
No. 3
F-CAN_L
No. 20
No. 11
U0122
U0128
F-CAN_H
Gauge control module connector A (32P)
No. 19
VSA modulator-control unit 46P connector
No. 20
F-CAN_L
No. 20
No. 21
U0131
F-CAN_H
Gauge control module connector A (32P)
No. 19
EPS control unit connector B (6P)
No. 3
F-CAN_L
No. 20
No. 1
U0132
F-CAN_H
Gauge control module connector A (32P)
No. 19
Adaptive damper control unit 24P connector
No. 19
F-CAN_L
No. 20
No. 20
U0151
F-CAN_H
Gauge control module connector A (32P)
No. 19
SRS unit connector A (39P)
No. 34
F-CAN_L
No. 20
No. 35
*1: L15B7/L15BA/L15BY engine
*2: K20C1 engine
*3: K20C2 engine

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
U0100
Substitute a known-good PCM, then recheck. If DTC U0100 goes away after substitution, replace the original PCM.
U0101
Substitute a known-good TCM, then recheck. If DTC U0101 goes away after substitution, replace the original TCM.
U0122
U0128
Replace the VSA modulator-control unit.
U0131
Substitute a known-good EPS control unit, then recheck. If DTC U0131 goes away after substitution, replace the original EPS control unit.
U0132
Substitute a known-good adaptive damper control unit, then recheck. If DTC U0132 goes away after substitution, replace the original adaptive damper control unit.
U0151
Substitute a known-good SRS unit, then recheck. If DTC U0151 goes away after substitution, replace the original SRS unit.
     
NO
     
     
     
Repair an open in the F-CAN_H wire and/or the F-CAN_L wire between the gauge control module and the transmitting control unit.?