DTC U0122-00: F-CAN Malfunction (Precision All Wheel Steer Control Unit-VSA Modulator-Control Unit) (Without ACC) (Precision All Wheel Steer Control Unit (Without ACC)) (2015-17)
NOTE:
- Before you troubleshoot, review the general troubleshooting information .
- The DTC may be stored in the event of a power/ground circuit failure at the VSA.
| DTC Description | DTC | Freeze Frame |
|---|---|---|
| U0122-00 F-CAN Malfunction (Precision All Wheel Steer Control Unit-VSA Modulator-Control Unit) |
DTC (Precision all wheel steer)
- 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. Start the engine, and let it idle for at least 10 seconds.
- 5. Check for DTCs with the HDS.
DTC Description DTC Freeze Frame U0122-00 F-CAN Malfunction (Precision All Wheel Steer 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. Refer to intermittent failures troubleshooting . 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.
- Open wire check (F-CAN_L, F-CAN_H lines (L4 engine) or F-CAN A_L, F-CAN A_H lines (V6 engine))
-1. Turn the vehicle to the OFF (LOCK) mode.
- 2. Disconnect the following connectors.
Precision all wheel steer control unit connector A (16P) VSA modulator-control unit 38P connector - 3. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode Precision all wheel steer control unit connector A (16P): disconnected VSA modulator-control unit 38P connector: disconnected Test point 1 Precision all wheel steer control unit connector A (16P) No. 14 - Refer to: Precision All Wheel Steer Control Unit Connector for Inputs and Outputs (2015-17) or Precision All Wheel Steer Control Unit Connector for Inputs and Outputs (2018-19) Test point 2 VSA modulator-control unit 38P connector No. 26 - Refer to: VSA Modulator-Control Unit Connector For Inputs And Outputs (With Auto Idle Stop System) (2015-17) or VSA Modulator-Control Unit Connector For Inputs And Outputs (Without Auto Idle Stop System) (2015-17) or VSA Modulator-Control Unit Connector for Inputs and Outputs (2018-19) Test point 1 Precision all wheel steer control unit connector A (16P) No. 6 - Refer to: Precision All Wheel Steer Control Unit Connector for Inputs and Outputs (2015-17) or Precision All Wheel Steer Control Unit Connector for Inputs and Outputs (2018-19) Test point 2 VSA modulator-control unit 38P connector No. 38 - Refer to: VSA Modulator-Control Unit Connector For Inputs And Outputs (With Auto Idle Stop System) (2015-17) or VSA Modulator-Control Unit Connector For Inputs And Outputs (Without Auto Idle Stop System) (2015-17) or VSA Modulator-Control Unit Connector for Inputs and Outputs (2018-19) Is there continuity?
YES
Check for loose terminals at the precision all wheel steer control unit connector A (16P) connector and the VSA modulator-control unit 38P connector. If they are OK, update the VSA modulator-control unit if it does not have the latest software - Refer to: VSA Modulator-Control Unit Update (With SH-AWD), or VSA Modulator-Control Unit Update (Without SH-AWD) , then recheck. If the DTC U0122-00 goes away and the VSA modulator-control unit was updated, troubleshooting is complete. If DTC U0122-00 is indicated after the VSA modulator-control unit updated, replace the original VSA modulator-control unit - Refer to: VSA Modulator-Control Unit Removal and Installation (With SH-AWD), or VSA Modulator-Control Unit Removal and Installation (Without SH-AWD) .
NO
Repair an open in the wire between the VSA modulator-control unit and the precision all wheel steer control unit.