Description of Frozen Values

Description of frozen values

Explanation
Frozen values are parameter values stored when a Diagnostic Trouble Code (DTC) is generated.
All parameters are not readable for all Diagnostic Trouble Codes (DTC), but only where they can provide more information on the conditions which existed when the Diagnostic Trouble Code (DTC) was generated.

Engine started, status
The status indicates whether the engine was running when the Diagnostic Trouble Code (DTC) was generated.
No = engine was not running.
Yes = engine was running.

Outside temperature, value
The value indicates the outside temperature at the time the Diagnostic Trouble Code (DTC) was generated.
Measurement range: -128° C to +127.75° C.

Power supply, Differential Electronic Module (DEM), value
The value indicates the power supply to the Differential Electronic Module (DEM) when the Diagnostic Trouble Code (DTC) was generated.
Measurement range: 0 - 24 V.
Normal range: 12.0 - 14.5 V.

Total distance, value
The value indicates the total distance covered by the vehicle at the time the Diagnostic Trouble Code (DTC) was generated.
Measurement range: 0 - 16777215 km.

Central Electronic Module (CEM) system voltage, value
The value indicates the voltage over the Central Electronic Module (CEM) when the Diagnostic Trouble Code (DTC) was generated.
Measurement range: 5 - 30 V.
Normal range: 12.0 - 14.5 V.

Oil temperature, value
The value indicates the oil temperature in the AOC coupling when the Diagnostic Trouble Code (DTC) was generated.
Measurement range: -128° C to +127° C.
Normal range: 50 - 60° C.

Oil pressure, value
The value indicates the oil pressure in the AOC coupling when the Diagnostic Trouble Code (DTC) was generated.
Measurement range: 0 - 4 MPa.
Normal range: 0.4 - 2.0 MPa.

Wheel speed, value
The value indicates the wheel speed when the Diagnostic Trouble Code (DTC) was generated.
Measurement range: 0-250 km/h.

Power supply, solenoid, value
The value indicates the supply through the control valve's solenoid when the Diagnostic Trouble Code (DTC) was generated.
Measurement range 0 - 4095 mA.

Power supply, pump motor, value
The value indicates the supply through the electrically driven feed pump when the Diagnostic Trouble Code (DTC) was generated.
Measurement range 0 - 8191 mA.

Brake pedal, status
The status indicates brake light switch position, activated or not activated, when the Diagnostic Trouble Code (DTC) was generated.
Active = Brake light switch actuated.
Inactive = Brake light switch not actuated.

Parking brake, status
The status indicates parking brake position, activated or not activated, when the Diagnostic Trouble Code (DTC) was generated.
Active = Parking brake actuated.
Inactive = Parking brake not actuated.

DEM status, status
The status indicates which status the Differential Electronic Module (DEM) detected it had (in terms of software) when the Diagnostic Trouble Code (DTC) was generated.
OK = AOC unit (coupling) is operating normally.
Coupling fully open upon request = AOC unit (coupling) fully open (requested from Brake Control Module (BCM)).
Coupling inactive or faulty (open) = AOC unit (coupling) is open due to a fault in the system.
Coupling closed = AOC unit (coupling) is closed due to a fault in the system.

ABS status, status
The status indicates whether or not the ABS brakes were modulated, when the Diagnostic Trouble Code (DTC) was generated.
Active = ABS modulation.
Inactive = No ABS modulation.

AOC status, status
The status indicates what the Brake Control Module (BCM) requested the AOC unit (coupling) to do when the Diagnostic Trouble Code (DTC) was generated.
Normal operation = Request from the Brake Control Module (BCM) for the AOC unit (coupling) to operate normally.
Rapid opening = Request from the Brake Control Module (BCM) for the AOC unit (coupling) to open quickly.
Slow opening = Request from the Brake Control Module (BCM) for the AOC unit (coupling) to open slowly.
Error in BCM = An error has occurred in the Brake Control Module (BCM) which means that the Differential Electronic Module (DEM) opens the AOC unit (coupling).

Gauge (high oil temperature), value.
The value indicates the number of times the Differential Electronic Module (DEM) has disengaged the all-wheel drive due to excessively high oil temperature.
Measurement range: 0 - 65534 times.

Engine speed, value
The value indicates the engine speed when the Diagnostic Trouble Code (DTC) was generated.
Measurement range:0-8191 r/min.
Idle speed: approx. 750 r/min.

Calculated engine torque, value
The value indicates an engine torque calculated by the Engine Control Module (ECM) when the Diagnostic Trouble Code (DTC) was generated.
Measurement range: -512 Nm to +511 Nm.

Rear axle torque, value
The value indicates the torque transferred to the rear axle, calculated by the AOC unit (coupling) when the Diagnostic Trouble Code (DTC) was generated.
Measurement range: 0-1020 Nm

Requested engine torque, value
The value indicates the engine torque requested by the driver when the Diagnostic Trouble Code (DTC) was generated.
Measurement range: -512 Nm to +511 Nm.