DTC Troubleshooting: U0100-00 (41-01), U0122-00 (41-02), U0131-00 (41-09), U0151-00 (41-08)
DTC U0100-00: F-CAN Malfunction (Lost Communication with Powertrain Control Module (PCM))
DTC U0101-00: F-CAN Malfunction (Lost Communication with AT Control System)
DTC U0122-00: F-CAN Malfunction (Lost Communication with VSA Modulator-Control Unit)
DTC U0131-00: F-CAN Malfunction (Lost Communication with EPS System)
DTC U0151-00: F-CAN Malfunction (Lost Communication with SRS unit)
NOTE: Before you troubleshoot, review the General Troubleshooting Information for the AWD with intelligent control system.

DTC Description
DTC
Freeze Frame
U0100-00 F-CAN Malfunction (Lost Communication with Powertrain Control Module (PCM))
    
U0101-00 F-CAN Malfunction (Lost Communication with A/T Control System)
    
U0122-00 F-CAN Malfunction (Lost Communication with VSA Modulator-Control Unit)
    
U0131-00 F-CAN Malfunction (Lost Communication with EPS control unit)
    
U0151-00 F-CAN Malfunction (Lost Communication with SRS unit)
    

1.
Problem verification (DTC check):

Problem verification (DTC check)
?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.
Start the engine.

?5.
Check for DTCs with the HDS.
DTC Description
DTC
Freeze Frame
U0100-00 F-CAN Malfunction (Lost Communication with Powertrain Control Module (PCM))
    
U0101-00 F-CAN Malfunction (Lost Communication with A/T Control System)
    
U0122-00 F-CAN Malfunction (Lost Communication with VSA Modulator-Control Unit)
    
U0131-00 F-CAN Malfunction (Lost Communication with EPS control unit)
    
U0151-00 F-CAN Malfunction (Lost Communication with SRS unit)
    

Is DTC U0100-00, U0101-00, U0122-00, U0131-00 or U0151-00 indicated?

     
DTC U0100-00 or U0101-00 is indicated
     
     
     
The failure is duplicated. Go to step 2.
     
DTC U0122-00 is indicate
     
     
     
The failure is duplicated. Go to step 3.
     
DTC U0131-00 is indicated
     
     
     
The failure is duplicated. Go to step 4.
     
DTC U0151-00 is indicated
     
     
     
The failure is duplicated. Go to step 4.
     
DTC is not indicated
     
     
     
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)1:

Open wire check (F-CAN_H, F-CAN_L lines)1
?1.
Turn the vehicle to the OFF (LOCK) mode, and wait 2 minutes.

?2.
Jump the SCS line with the HDS, and wait more than 1 minute.

?3.
Disconnect the following connectors.
AWD control unit 24P connector
PCM connector A 51P connector

?4.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
AWD control unit 24P connector: disconnected
 
PCM connector A: disconnected
Test point 1
AWD control unit 24P connector No. 14
Test point 2
PCM connector A (51P) No. 2


Is there continuity?

     
YES
     
     
     
Substitute a known-good PCM and recheck. If the symptom/indication goes away with the PCM, troubleshooting is complete. If the symptom/indication goes away with a known-good PCM, replace the original PCM.?
     
NO
     
     
     
Repair an open in the F-CAN_H and/or F-CAN_L wires between the AWD control unit and the PCM.?
3.
Open wire check (F-CAN_H, F-CAN_L lines)2:

Open wire check (F-CAN_H, F-CAN_L lines)2
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Disconnect the following connectors.
AWD control unit 24P connector
VSA modulator-control unit 46P connector

?3.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
AWD control unit 24P connector: disconnected
 
VSA modulator-control unit 46P connector: disconnected
Test point 1
AWD control unit 24P connector No. 14
Test point 2
VSA modulator-control unit 46P connector No. 40


Is there continuity?

     
YES
     
     
     
Update the VSA modulator-control unit if it does not have the latest software, and recheck. If the symptom/indication goes away with the updated VSA modulator-control unit, troubleshooting is complete. If the symptom/indication does not goes away with the updated the VSA modulator-control unit, replace the VSA modulator-control unit.?
     
NO
     
     
     
Repair an open in the F-CAN_H and/or F-CAN_L wires between the AWD control unit and the VSA modulator-control unit.?
4.
Open wire check (F-CAN_H, F-CAN_L lines)3:

Open wire check (F-CAN_H, F-CAN_L lines)3
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Disconnect the following connectors.
AWD control unit 24P connector
EPS control unit B 6P connector

?3.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
AWD control unit 24P connector: disconnected
 
EPS control unit B 6P connector
Test point 1
AWD control unit 24P connector No. 14
Test point 2
EPS control unit B 6P connector No. 3


Is there continuity?

     
YES
     
     
     
     
NO
     
     
     
Repair an open in the F-CAN_H and/or F-CAN_L wires between the AWD control unit and the EPS control unit.?
5.
Open wire check (F-CAN_H, F-CAN_L lines)4:

Open wire check (F-CAN_H, F-CAN_L lines)4
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Disconnect the following connectors.
AWD control unit 24P connector
SRS unit A 39P connector

?3.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
AWD control unit 24P connector: disconnected
 
SRS unit A 39P connector
Test point 1
AWD control unit 24P connector No. 14
Test point 2
SRS unit A 39P connector No. A34


Is there continuity?

     
YES
     
     
     
     
NO
     
     
     
Repair an open in the F-CAN_H and/or F-CAN_L wires between the AWD control unit and the SRS unit.?