LKAS Control Unit DTC 28: Wheel Speed Signal Value Error (Wheel Speed Signal) Clear the DTCs with the HDS. 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
Start the engine and test-drive a car for two minutes or more every 65 km/h (41 mph) or more. 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.■
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.■