Diagnostic Trouble Code (DTC) Information

Diagnostic trouble code (DTC) information

Condition
The Suspension module (SUM) receives information about the body's vertical position from four different height sensors.
The height sensors are located in the body, one at each wheel. Each height sensor has mechanical contact with the suspension via a control arm.
The diagnostic trouble code (DTC) is stored if the control module detects that:
- The signal from the height sensor has voltage outside its permitted range.
The control module's test for the diagnostic trouble code (DTC) starts in the event of:
- Engine on and vehicle speed over 2 km/h.
- The test is carried out every other operating cycle. The Suspension module (SUM) defines an operating cycle as ignition on and ignition off.

Note! The control module can only detect the fault once the test has been started and the diagnostic trouble code (DTC) is stored when the conditions are met.

The diagnostic trouble code (DTC) indicates the relevant height sensor.
- SUM-C1A0329: Height sensor, left front.
- SUM-C1A0429: Height sensor, right front.
- SUM-C1A0529: Height sensor, left rear.
- SUM-C1A0629: Height sensor, right rear.





Substitute value
- Deactivated Four-C function.

Possible source
- Contact resistance or oxidation in the connectors.
- Open-circuit in the signal cable from the height sensor.
- Damaged height sensor.

Fault symptom[s]
- Message in information display
- Four-C function not working