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Description of Frozen Values, DEM






Description of frozen values

Explanation
Frozen values are parameter values stored when a Diagnostic Trouble Code (DTC) is generated.
All the values that are given are measured between the respective connection given in column 1 and #2 (ground)

Total Mileage, value
The value indicates the total distance covered by the vehicle at the time the Diagnostic Trouble Code (DTC) was generated.
Measurement range: 0 -16,777,215 km.

MECU power supply, value
The value indicates the voltage over the Central Electronic Module (CEM) when the Diagnostic Trouble Code (DTC) was generated.
Measurement range: 0 -64 V.
Normal range: 12.0 - 14.5 V.

Outside temperature, value
The value indicates the outside temperature at the time the Diagnostic Trouble Code (DTC) was generated.
Measurement range: -40 °C to +215 °C.

Power supply position, status
Indicates the current status of the power supply mode when the diagnostic trouble code (DTC) was stored.
Key removed
Key recently removed
Key approved
Ignition off after Accessory position
Accessory position
Accessory position after Ignition on
Ignition on
Running
Start attempts

Diagnostic information, status
Indicates the diagnostic status of the differential electronic module (DEM) when the diagnostic trouble code (DTC) was stored.
No diagnostic trouble code (DTC) = No diagnostic trouble code (DTC) is stored in the control module.
At least one diagnostic trouble code (DTC) = At least one diagnostic trouble code (DTC) is stored in the control module.
All diagnostic tests have not been carried out = All diagnostic tests in the control module have not been carried out.
All diagnostic tests have been carried out = All diagnostic tests in the control module have been carried out.

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 -25.5 V.
Normal range: 12.0 - 14.5 V.

ECU-temperature
The value shows the temperature in Differential electronic module (DEM). The temperature sensor is located on the circuit board.

Power supply, pressure reducing valve, value
The value indicates the current through the pressure reducing valve when the Diagnostic Trouble Code 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
Indicates the stop lamp switch position, activated or not activated, when the diagnostic trouble code (DTC) was stored.
Active = Brake light switch actuated.
Not active = Stop lamp switch off.

Parking brake, status
Indicates the parking brake position, activated or not activated, when the diagnostic trouble code (DTC) was stored.
Active = Parking brake actuated.
Not active = Parking brake not applied.

DEM status
Indicates the status of the differential electronic module (DEM) (software related) when the diagnostic trouble code was stored.
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.
Clutch overheated = Active on Demand Coupling overheated.
Clutch overheated (open) = the Active on Demand Coupling unit (clutch) is open due to overheating. No torque transferred to the rear axle.
The clutch completely locked on request = Active on Demand Coupling unit (clutch) completely locked (request from the brake control module (BCM)). Maximum torque transferred to the rear axle.

Diagnostic information, status
Indicates the diagnostic status of the differential electronic module (DEM) when the diagnostic trouble code (DTC) was stored.
No diagnostic trouble code (DTC) = No diagnostic trouble code (DTC) is stored in the control module.
At least one diagnostic trouble code (DTC) = At least one diagnostic trouble code (DTC) is stored in the control module.
All diagnostic tests have not been carried out = All diagnostic tests in the control module have not been carried out.
All diagnostic tests have been carried out = All diagnostic tests in the control module have been carried out.

ABS status
Indicates the status of ABS control when the diagnostic trouble code (DTC) was stored. The differential electronic module (DEM) obtains the value via the control area network (CAN) from the brake control module (BCM).
Active = ABS modulation.
Inactive = No ABS modulation.

AOC status
Indicates the status of the Active on Demand Coupling when the diagnostic trouble code (DTC) was stored. The differential electronic module (DEM) obtains the signal from the brake control module (BCM). The signal is used to deactivate the Active on Demand Coupling during special driving conditions.
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).
Completely locked = Request from the brake control module (BCM) that the Active on Demand Coupling unit (clutch) should lock completely (maximum torque to the rear axle).
Torque limiting = Request from the brake control module (BCM) that the Active on Demand Coupling unit should limit the torque to the rear axle.

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: 0-65,534 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 front wheel drive torque, value
The value indicates one engine control module (ECM) calculated torque, supplied to the Active on Demand Coupling input shaft (propeller shaft) when the diagnostic trouble code (DTC) was stored. Calculation includes the gear ratio of the transmission and the final drive. The differential electronic module (DEM) obtains the value via the controller area network (CAN) from the engine control module (ECM).
Measurement range: -16.376 Nm to +16.384 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 -8191 Nm

Requested rear axle torque, value
The value indicates one brake control module (BCM) requested maximum rear axle torque when the diagnostic trouble code (DTC) was stored. The differential electronic module (DEM) uses this information to correctly transfer torque to the rear axle. Also see the "Rear axle torque" parameter.
Measurement range: 0 - 8191 Nm.

Requested front wheel drive torque, value
The value indicates the requested engine torque of the driver when the diagnostic trouble code (DTC) was stored. The differential electronic module (DEM) uses this information to correctly transfer torque to the rear axle.
Measurement range: -16.376 Nm to +16.375 Nm.

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