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Home >> Mercedes Benz Truck >> 2011 >> Sprinter 3500 Cab (906.155) V6-3.0L DSL Turbo (642.898) >> Repair and Diagnosis >> Body and Frame >> Body Control Systems >> Body Control Module >> Description and Operation >> GF54.21-D-3006H Functional Scope of Vehicle, PSM, Function >> Part 1

Part 1




GF54.21-D-3006H Functional Scope Of Vehicle, PSM, Function

- with CODE (ED5) Parameterizable special module (PSM)


- with CODE (ED8) Preinstallation for parameterizable special module (PSM)

Vehicle functions
A multitude of vehicle functions can be controlled via the Controller Area Network-bus Class B (interior) (CAN-B) interface of the PSM control unit. A number of conditions must be fulfilled before these functions can be activated.
When a function is activated, a signal is additionally set in the signal pool.

Parameterization options of CAN-B outputs

Alarm flashing
The priority and the wake capability of the alarm functions "Front fog lamp" and "High beam" is established with this option. All the other alarm functions are always prioritized and capable of waking accordingly.

In the case of an option selected the affected output CAN-B is capable of waking and the request is not terminated by an operation of the vehicle control.

Example
Request "High beam alarm flashing" is then no longer terminated by the high beam switch on the combination switch. When a bit is not set the output is not CAN-B capable of waking and the request is terminated by the vehicle controls.

Turn signal cancellation via steering angle
In the case of the turn signal outputs, the function whereby the turn signals are canceled via the steering angle can be activated for the turn signal outputs. The angles for activation and the hysteresis for triggering turn signal cancellation can be parameterized under "Signals to interior CAN bus - Illumination and signaling horn - Property parameterization".
The system then responds in the following way:
- If the steering angle that is specified in the parameter "Steering angle for turn signal cancellation" is exceeded, cancellation is activated.
- If the steering angle exceeds the value "Steering angle for turn signal cancellation" - "Hysteresis of steering angle for turn signal cancellation", turn signal control is aborted.

Parameterization example
The following conditions must be fulfilled:
- The steering angle for turn signal cancellation is set to 80 °.
- The hysteresis for deactivation of the turn signal is set to 20 °.

The following functions are performed:
- The left turn signal is activated by the PSM control unit.
- The steering angle exceeds 80 ° to the left -> turn signal cancellation is activated internally.
- The steering angle drops below 80 ° to 20 ° = 60 °, i. e. actuation of the left turn signal is reset.

The turn signal reset is only possible on vehicles with Electronic Stability Program (Electronic-Stability-Program) (ESP) or on vehicles on which the steering column module with steering angle sensor has been ordered specially as special equipment (SA).

Control via switch or button
With the following vehicle functions, it is possible to select whether a switch or button is to be used to control the function:
- Function "Front fog lamp alarm"
- Function "High beam alarm"
- Function "Interior lighting alarm"
- Function "Hazard warning flasher alarm"
- Function "Left or right turn signals"
- Function "High beams"
- Function "Hazard warning flashers"
- Function "Left or right parking lights"
- Function "Automatic lights"
- Function "Standing lights"
- Function "Low beams"
- Function "Front fog lamps"
- Function "Rear fog lamp"
- Function "Signaling horn"
- Function "Intermittent rear wiper"
- Function "Rear window heater"
- Function "Windshield heater" (model 906)

If a discrete input is used for activating these functions, the parameterization "Switch or button" must be set in the properties of the discrete input. "Switch" must be selected for the signal parameter of the CAN-B function. Malfunctions may occur otherwise.

Illumination and signaling horn
The signals of the CAN-B outputs "Illumination and signaling horn" can be selected via a Diagnosis Assistance System (DAS) menu mask.
The individual menu items contain the following signals:
- Signal "Actuate signaling horn"
- Signal "Switch on left turn signal"
- Signal "Switch on right turn signal"
- Signal "Switch on high beam"
- Signal "Switch on headlamp flasher"
- Signal "Switch on hazard warning flasher"
- Signal "Switch on front interior lights"
- Signal "Switch on rear interior lights"
- Signal "Switch on left parking lamp"
- Signal "Switch on right parking lamp"
- Signal "Switch on automatic driving lights ("Auto")"
- Signal "Switch off light"
- Signal "Switch on standing lamps"
- Signal "Switch on low beam"
- Signal "Switch on front fog lamps"
- Signal "Switch on rear fog lamp"

All signals are explained below in the same sequence as the menu items.

Signal "Actuate signaling horn"
An active input sets the request "Signaling horn ON" on CAN-B. The "Signaling horn" function is switched on.
The following function requirements must be met:
- "Circuit 15R ON", otherwise the signal is canceled. The internal request remains active.
- The "Signaling horn" function is not switched on when the input is activated. The input is otherwise ignored until a new activation process begins.

Signal "Switch on left turn signal" or signal "Switch on right turn signal"
An active input sets the respective request (e.g. "Left turn signal ON") on CAN-B.
The "Left turn signal" function is switched on.
The following function requirements must be met:
- "Circuit 15R ON", otherwise the signal is canceled. The internal request remains active.
- If the function "Left turn signal" or the function "Right turn signal" is activated via the left and right turn signal switch of the vehicle, the request is canceled by the PSM control unit and the input is ignored up to a new activation process.
- The signal is reset when the PSM control unit input "Right turn signal" is activated. The input ("Left turn signal") is ignored until a new activation process begins.

The following parameterizable options exist:
- Turn signal cancellation via steering angle
- Depending on circuit 15 and steering angle
- Cancellation according to parameterized turn signal cancellation
- Input is ignored until a new activation process is started

Signal "Switch on high beam"
An active input sets the request "High beam ON" on CAN-B. The "High beam" function is switched on.
The following function requirements must be met:
- The "High beam" function is not switched on when the input is activated. The input is otherwise ignored until a new activation process begins.
- The "Low beam" function must be switched on, either via the rotary light switch or via the PSM control unit, otherwise the input is ignored until a new activation process begins.
- "Circuit 15R ON", otherwise the signal is canceled. The internal request remains active.

Signal "Switch on headlamp flasher"
An active input sets the request "Headlamp flasher ON" on CAN-B. The "Headlamp flasher" function is switched on.
The following function requirements must be met:
- The "Headlamp flasher" function is not switched on when the input is activated. The input is otherwise ignored until a new activation process begins.
- "Circuit 15R ON", otherwise the signal is canceled. The internal request remains active.

Signal "Switch on hazard warning flasher"
An active input sets the request "Hazard warning flasher ON" on CAN-B. The "Hazard warning flasher" function is switched on.

The function requirement that the function "hazard warning flasher" is not switched on via the hazard warning system switch must exist. The input is otherwise ignored until a new activation process begins.
A further effect is that when the requests "Left turn signal" or "Right turn signal" are active via the PSM control unit, these are deactivated until the input "Hazard warning flasher" is canceled. However, their internal request continues to exist.

Signal "Switch on front interior lights"
An active input sets the request "Front interior lights ON" on CAN-B.
The "Front interior lights" function is switched on.
The function requirement that the "Front interior lights" function should not be switched on must be satisfied. The input is otherwise ignored until a new activation process begins.

Signal "Switch on rear interior lights"

Only possible with standard overhead control panel.

An active input sets the request "Rear interior lights ON" on CAN-B.
The "Rear interior lights" function is switched on.
Precondition: The rear interior lights should not be switched on. The input is otherwise ignored until a new activation process begins.

Signal "Switch on left parking light" or signal "Switch on right parking light"
An active input sets the respective request (e.g. "Switch on left parking light" function) on CAN-B. The "Left parking light" function is switched on.

The following function requirements must be met:
- As of "circuit 15R ON" the signal is canceled. The internal request remains active.
- The rotary light switch must be set to "0", otherwise the input is ignored until a new activation process begins.

Signal "Switch on automatic driving lights ("Auto")"
An active input sets the request "Automatic lights" on CAN-B.
The following function requirements must be met:
- Circuit 15R ON", otherwise the signal is canceled. The internal request remains active.
- The rotary light switch must be set to "0", otherwise the input is ignored until a new activation process begins.

Signal "Switch on standing lamps"
An active input sets the request "Switch on standing lights" on CAN- B. The "Standing lights" function is switched on.
The function requirement is that the rotary light switch must be set to "0" or "Auto". The input is otherwise ignored until a new activation process begins.

Signal "Switch on low beam"
An active input sets the request "Low beam ON" on CAN-B. The "Low beam" function is switched on.
The following function requirements must be met:
- "Circuit 15R ON", otherwise the signal is canceled. The internal request remains active.
- The rotary light switch must be set to "0", "Auto" or "Standing lights ON", otherwise the input is ignored until a new activation process begins.

Signal "Switch on front fog lamps"
An active input sets the request "Switch on front fog lamps" on CAN-B. The "Front fog lamps" function is switched on.
The following function requirements must be met:
- "Circuit 15R ON", otherwise the signal is canceled. The internal request remains active.
- The "Low beam" function must be switched on, either via the rotary light switch or via the PSM control unit, otherwise the input is ignored until a new activation process begins.
- The "Front fog lamps" function must be available and must not be switched on.

Signal "Switch on rear fog lamp"
An active input sets the request "Rear fog lamp ON" on CAN-B. The "Rear fog lamp" function is switched on.
The following function requirements must be met:
- "Circuit 15R ON", otherwise the signal is canceled. The internal request remains active.
- The "Front fog lamps" function must be switched on, either via the rotary light switch or via the PSM control unit, otherwise the input is ignored until a new activation process begins.
- The rear fog lamp and thus the "rear fog lamp" function must be present as special equipment. The "Rear fog lamp" function must not be switched on.

Alarm function
The signals of the CAN-B outputs "Alarm function" can be selected via a DAS menu mask.
The individual menu items contain the following signals:
- Signal "Switch on front fog lamps"
- Signal "Switch on high beam"
- Signal "Synchronous flashing of front fog lamps and high beam"
- Signal "Switch on interior lights"
- Signal "Switch on hazard warning flasher"
- Signal "Actuate signaling horn"

All signals are explained below in the same sequence as the menu items.

Signal "Switch on front fog lamps"
An active input sets the request "Switch on front fog lamp alarm" on CAN-B. The priority and wake capability are dependent on the "Alarm flashing" coding.
The "High beam" function flashes according to the parameter settings "Duration of light phase" and "Duration of dark phase".

Parameterizable option
The light and dark times for flashing of the "Front fog lamp alarm" function can be found in "Signals to interior CAN bus - Alarm - Property parameterization".

Signal "Switch on high beam"
An active input sets the request "High beam alarm ON" on CAN-B. The priority and wake capability are dependent on the "Alarm flashing" coding.
The "High beam" function flashes according to the parameter settings "Duration of light phase" and "Duration of dark phase". If the "Front fog lamps" function is active in the flashing or alarm flashing mode, the set light and dark times of the "Front fog lamp" function are used.

Parameterizable option
The light and dark times for flashing of the "High beam alarm" function can be found in "Signals to interior CAN bus - Alarm function - Property parameterization".

Signal "Synchronous flashing of front fog lamps and high beam"
An active input sets the request "Synchronous flashing of front fog lamps and high beam" on CAN-B.
The priority and wake capability are dependent on the "Alarm flashing" coding.
The function requirement that the "High beam" function and the "Front fog lamp" function be active in the flashing or alarm flashing mode must be satisfied.

Signal "Switch on interior lights"
An active input sets the request "Interior light alarm ON" on CAN-B. The "Interior lights" function is switched on.

Signal "Switch on hazard warning flasher"
An active input sets the request "Warning flashing alarm ON" on CAN-B. The "Hazard warning flasher" function flashes according to the parameter settings "Hazard warning flasher (light phase)" and "Hazard warning flasher (dark phase)".

Parameterizable option
The light and dark times for flashing of the "Hazard warning flasher alarm" function can be found in "Signals to interior CAN bus - Alarm - Property parameterization".

Signal "Actuate signaling horn"
An active input sets the request "Signaling horn alarm ON" on CANS-B. The "Signaling horn" function is switched on and off using the times "PSM signaling horn ON" and "PSM signaling horn OFF".

Parameterizable option
The ON and OFF times for the "Signaling horn alarm" function can be found in "Signals to interior CAN bus - Alarm - Property parameterization".

Sliding roof functions

Tilting/sliding roof (SHD)
The signals of the CAN-B outputs "Sliding roof" can be selected via a DAS menu mask.
The individual menu items contain the following signals:
- Signal "Manually raise sliding roof"
- Signal "Automatically raise sliding roof"
- Signal "Manually lower sliding roof"
- Signal "Automatically lower sliding roof"
- Signal "Manually open sliding roof"
- Signal "Automatically open sliding roof"
- Signal "Manually close sliding roof"
- Signal "Automatically close sliding roof"

An active input sets the respective request (e.g. "Manually raise sliding roof") on CAN-B. The sliding roof is raised manually.

The function requirement as of "circuit 15 ON" must be satisfied, otherwise the signal and the internal request will be canceled.

Rear sliding roof unit (SDE-H) (model 639)
The signals of the CAN-B outputs "Rear sliding roof" can be selected via a DAS menu mask. The individual menu items contain the following signals:
- Signal "Manually raise sliding roof"
- Signal "Automatically raise sliding roof"
- Signal "Manually lower sliding roof"
- Signal "Automatically lower sliding roof"
- Signal "Manually open sliding roof"
- Signal "Automatically open sliding roof"
- Signal "Manually close sliding roof"
- Signal "Automatically close sliding roof"

An active input sets the respective request (e.g. "Manually raise rear sliding roof") on CAN-B. The "Rear sliding roof unit (SDE-H)" function is raised manually.
The function requirement as of "circuit 15 ON" must be satisfied, otherwise the signal and the internal request will be canceled.
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