DTC U0122-00: F-CAN Malfunction (EPS Control Unit-VSA Modulator-Control Unit) (KA/KC models)

NOTE: Before you troubleshoot, review the general troubleshooting information .

DTC (EPS)

1. Problem verification:

   - 1. Turn the vehicle to the ON mode.

   - 2. Clear the DTC with the HDS.

   Clear DTCs

   - 3. Turn the vehicle to the OFF (LOCK) mode, then to the ON mode.

   - 4. Wait 60 seconds or more.

   - 5. Check for DTCs with the HDS.

   DTC Description	DTC	Freeze Frame
   U0122-00 F-CAN Malfunction (EPS Control Unit-VSA Modulator-Control Unit)

   Is DTC U0122-00 indicated?

   YES 

   The failure is duplicated. Go to step 2.

   NO 

   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. Turn the vehicle to the OFF (LOCK) mode.

   - 2. Disconnect the following connectors.

   EPS control unit connector B (6P)

   VSA modulator-control unit 38P connector

   - 3. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	EPS control unit connector B (6P): disconnected
   	VSA modulator-control unit 38P connector: disconnected
   Test point 1	EPS control unit connector B (6P) No. 4
   Test point 2	VSA modulator-control unit 38P connector No. 38. Refer to VSA MODULATOR-CONTROL UNIT CONNECTOR FOR INPUTS AND OUTPUTS

   Test point 1	EPS control unit connector B (6P) No. 3
   Test point 2	VSA modulator-control unit 38P connector No. 26. Refer to VSA MODULATOR-CONTROL UNIT CONNECTOR FOR INPUTS AND OUTPUTS .

   Is there continuity?

   YES 

   Update the VSA modulator-control unit if it does not have the latest software . If the VSA modulator-control unit was updated and the symptom is still present, replace the VSA modulator-control unit .

   NO 

   Repair an open in the wire between the EPS control unit and the VSA modulator-control unit.