Description of frozen values: General

Frozen values are parameter values that are stored when a diagnostic trouble code (DTC) is generated.

Not all the parameters described need to be implemented in the control module. This varies from system to system. Parameters can also vary depending on with which type of transmission the car is equipped.

Certain parameters can be displayed without a value or with unreasonable values. This can occur if the control module has not stored a value, when a basic value has been stored instead or if the parameter is received via the CAN-network when there is an error on the CAN-network. For example, the rpm values may be unreasonable if a malfunction occurs for the transmission's speed sensors.

Definition of an operating cycle 

The definition of an operating cycle varies depending on the software version.

Alternative definitions 

• The ignition has been switched off, then switched on and finally switched off again.
• The ignition has been switched off, the engine started and finally the ignition switched off again.
• The ignition has been off, the engine started, the car driven at a speed above 30 km/h for more than 3 minutes and finally the ignition switched off again.