LKAS Control Unit DTC 28: Wheel Speed Signal Value Error (Wheel Speed Signal)

1. Clear the DTCs with the HDS.

1. Do the following check.
   - Suspension is not modified
   - All four tyres the correct size, same manufacturer, and same type
   - All four tyres the correct pressure

Are they normally?

YES | - | Go to Step 3 .
NO | - |

- Adjust the wheel alignment
- Adjust the tyre pressure
- Change for the standard tyres

1. Start the engine and test-drive a car for two minutes or more every 65 km/h (41 mph) or more.

1. Watch the adaptive cruise control (ACC)/LKAS indicator.

Does the adaptive cruise control (ACC)/LKAS indicator come on?

YES | - | Go to Step 5 .
NO | - | Intermittent failure, the system is OK at this time.■

1. Check for DTC with HDS.

Is DTC 28 indicated?

YES | - | Check for loose terminals in the LKAS control unit connectors, and repair if necessary. If no poor connections are found, replace the LKAS control unit. ■
NO | - | Do the appropriate troubleshooting for the code indicated.■