Tag axle lift is not reported correctly by SMS:ELC or CMS
• Check the SMS::ELC and CMS for related DTCs. If no related DTCs found in either system, see below. The most likely cause, if this failure occurs at a workshop, is that the SMS::ELC has been set in a higher diagnostic session (e.g. Programming Session) during SDP3 usage. This will cause the SMS::ELC to send signals values N/A (Not Available). In this case no DTC will be stored in the SMS:ELC. The SMS:ELC can be forced to send valid data by performing one of the following actions: • Use the tag axle lift / lower button. - e.g. if tag axle is lifted --> press "lift" - e.g. if tag axle is down --> press "lower" • Drive the vehicle at speeds exceeding 5 km/h. • Perform reset of SMS:ELC by either KWP or starter key.
What you'll see
No driver-visible symptom recorded.
System reaction
Yellow Steer tag axle fault wa EST in fixed centred mode
Diagnostic depth
Tag axle lift is not reported correctly by the Suspension Management System (SMS) Ordinary SMS:ELC or CMS system sends unvalid values for LiftAxleposition.
The SMS unit sends invalid values. •For vehicles with air suspension the ELC is the SMS. •For vehicles without air suspension the CMS is the SMS.