DTC U0420-00: Invalid Data Received From Power Steering Control Module; DTC U0420-82: Invalid Data Received From Power Steering Control Module Alive / Sequence Counter Incorrect / Not Updated [07/2015 - ]: Procedure

1. Using the Techstream, perform the power steering ECU DTC inspection.

   Refer to DTC CHECK / CLEAR [07/2015 - ]

   Chassis > Electronic-Controlled Power Steering > Trouble Codes 

2. Are any DTCs present?

   Result

   Proceed to
   Yes
   No

Result:  2

Yes 

See step  5

Result:  1

No 

See step  2

1. Using the Techstream, clear the DTC from the laser sensor.

   Refer to DTC CHECK / CLEAR [07/2015 - ]

   Chassis > Smart City Brake Support > Clear DTCs 

2. Using the Techstream, perform the laser sensor DTC inspection.

   Refer to DTC CHECK / CLEAR [07/2015 - ]

   Chassis > Smart City Brake Support > Trouble Codes 

3. Is the same DTC present?

   Result

   Proceed to
   Yes
   No

Result:  2

Yes 

See step  4

Result:  1

No 

See step  3

1. Are any DTCs present?

   Result

   Proceed to
   Yes
   No

Result:  1

No 

DTC TROUBLESHOOTING COMPLETED. 

Result:  2

Yes 

GO TO APPLICABLE DTC INSPECTION.. Refer to  DIAGNOSTIC TROUBLE CODE CHART [07/2015 - ] 

1. Verify that the steering angle sensor is equipped, and its wiring harness connects with engine stop and start ECU.

   Refer to REMOVAL [07/2015 - ]

2. Using the Techstream, select the PID item "Steering Wheel Estimated Absolute Angle" for power steering ECU.
3. Verify the monitor value with steering wheel position 0° (vehicle wheels straight-ahead).
   1. If monitor value is +-20° or less, replace the steering column, then go to the next step.

      Refer to REMOVAL [07/2015 - ]

   2. If monitor value is +-20° or more, verify that the pre-collision warning light (amber) blacks out when vehicle is driven for approx. 5 min after the steering angle signal is reset.

      Refer to ENGINE STOP AND START ECU CONFIGURATION (USING AS-BUILT DATA) [07/2015 - ]

4. If the malfunction recurs, replace the steering column, then go to the next step.

   Refer to REMOVAL [07/2015 - ]

   Result

   Proceed to
   NEXT

Result:  1

NEXT 

See step  2

1. Refer to DIAGNOSTIC TROUBLE CODE CHART [07/2015 - ]
2. DTC troubleshooting completed, then go to the next step.

   Result

   Proceed to
   NEXT

Result:  1

NEXT 

See step  1