FREE REPAIR MANUALS & LABOR GUIDES 1982-2013 Vehicles
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Description of Parameters






Description of parameters

Power supply, control module, value
The value indicates the power supply of the control module.
Measurement range: 0-17.5 V.

Power supply, central electronic module (CEM), value
The value indicates battery voltage at the central electronic module (CEM). The combustion preheater module (CPM) obtains the value from the central electronic module (CEM) via the CAN network.
Measurement range: 0 V and up.

Degree of modulation of Glow plug, value
The value indicates to what degree the glow plug is active.
Measurement range: 0-100 %.

Operating state, status
The value indicates the operating state of the heater.

Fuel pump, status
The value indicates whether the fuel pump is active.
Off = Inactive.
On = Active.

Glow plug, status
The value indicates whether the glow plug is active.
Off = Inactive.
On = Active.

Combustion air fan, status
The value indicates whether the fan is active.
Off = Inactive.
On = Active.

Fuel preheater, status
The value indicates whether the fuel preheater is active. Applies to diesel only.
Off = Inactive.
On = Active.

Coolant pump, status
The value indicates whether the coolant pump is active.
Off = Inactive.
On = Active.

Burn time (hours), Burn time (minutes), Running time (hours), Running time (minutes), value
The value indicates how long the heater has been running (running time) and how long the flame has been active (burn time).
Measurement range: 0 and upwards.

Global time, value
The value indicates the time (minutes) since the central electronic module (CEM) was put into operation. The combustion preheater module (CPM) obtains the value from the central electronic module (CEM) via the CAN network.
Measurement range: 0 and upwards.

Distance, value
The value indicates the distance traveled (km) since the central electronic module (CEM) was put into operation. The combustion preheater module (CPM) obtains the value from the central electronic module (CEM) via the CAN network.
Measurement range: 0 and upwards.

Engine started, status
The value indicates engine status. The combustion preheater module (CPM) obtains the value from the central electronic module (CEM) via the CAN network.
Yes = Engine started.
No = Engine not started.

Engine running, status
The value indicates engine status. The combustion preheater module (CPM) obtains the value from the central electronic module (CEM) via the CAN network.
Yes = Engine running.
No = Engine switched off.

Passenger compartment temperature, value
The value indicates passenger compartment temperature. The combustion preheater module (CPM) obtains the value from the central electronic module (CEM) via the CAN network.
Measurement range: -40 and warmer.

Outside temperature, value
The value indicates outside temperature. The combustion preheater module (CPM) obtains the value from the central electronic module (CEM) via the CAN network.
Measurement range: -40 and warmer.

Engine temperature, value
The value indicates engine temperature. The combustion preheater module (CPM) obtains the value from the central electronic module (CEM) via the CAN network.
Measurement range: -40 and warmer.

Power supply mode, status
The value indicates which power supply mode this vehicle is in. The combustion preheater module (CPM) obtains the value from the central electronic module (CEM) via the CAN network. The following modes can be seen:
Key out.
Key recently removed.
Key approved.
Ignition off after Accessory position.
Accessory position.
Ignition on.
Accessory position after Ignition on.
Running.
Start attempt.