Engine Run-On Function - GF07.10-S-2684TRA

Model 447

with code MW1 (Engine run-on system)

Function requirements for engine run-on, general points

Circuit 87M ON (Engine management ON)
Engine runs
Transmission in neutral (with code GE1 (6-speed manual transmission TSG 380))
Selector lever position "P" (with code G42 (7G-TRONIC PLUS))
Parking brake operated
Vehicle speed signal = 0 km/h
Engine run-on ACTIVE
SSC not active

Engine run-on, general points

The engine run-on function allows engine running with a removed transmitter key (A8/1) with simultaneous closing of the vehicle from the outside. The engine run-on serves to provide additional supply of power for electrical consumers such as the refrigeration units or special signal systems.

Model 447 with code MJ8 (ECO start/stop function)

For active vehicles the ECO start/stop function must be deactivated temporarily for an active engine run-on.

Function sequence for the engine run-on

The function sequence is subdivided into the following steps:

Activation of the engine run-on
Status: engine run-on active
Monitoring of the status: engine run-on active

Activation of the engine run-on

Activation of the engine run-on takes place by removing the transmitter key (A8/1) while simultaneously pressing the engine run-on button (N74s4) for 3 s. The activated condition is signalized by an LED in the engine run-on button (N74s4).

The transmitter key (A8/1) is sent by the electronic ignition lock (EIS) control unit (N73) via the interior CAN (CAN B) to the parameterizable special module (PSM) control unit (N26/16). The status of the engine run-on button (N74s4) is sent by the driver assistance system control panel control unit (N74) via instrument panel LIN (LIN 1) to the SAM control unit (SAM) (N10/1) and from there via the interior CAN (CAN B) to the parameterizable special module control unit (PSM) (N26/16).

As soon as the stated function requirements are not being fulfilled or a time outfall (message timeout) occurs, activation of the engine run-on is interrupted. Interruption occurs over the electronic ignition lock control unit (EZS) (N73).

Status: engine run-on active

In the status engine run-on active, the central locking can be locked and unlocked for a removed transmitter key (A8/1). If the lock takes place with the transmitter key (A8/1), actuation of the driver central locking inside door handle central locking switch (S85/5) or the front passenger central locking inside door handle switch (S85/6) is ignored by the electronic ignition lock control unit (EIS) (N73).

Monitoring of the status: engine run-on active

As soon as the named function requirements are not fulfilled or a timeout case (message timeout) arises, the engine run-on is interrupted. Interruption occurs over the electronic ignition lock control unit (EZS) (N73).

Overview of system components for taxi/rental vehicle

With CODE ZK2 (Taxi version with emergency alarm system) or with CODE ZK3 (Taxi version without emergency alarm system) or with CODE ZM7 (Rental car package with emergency alarm system) or with CODE ZM8 (Rental car package)

GF82.25-S-9890TRA