PSM / MPM (ED5) Information

Interface between your vehicle and your electronic systems.

PSM Description

The Sprinter and the Mercedes-Benz Metris have a fully multiplexed electronic system, networked with several CAN bus systems.

The programmable special module (PSM) provides the interface between the vehicle and auxiliary electronic systems and creates a host of possibilities.

The programmable special module (PSM) is an optional adjustable electronic module that is the only approved analog and digital gateway into the vehicle's electronic system.

The PSM was developed specifically to provide customers, upfitters and, fleets hardware and software access to individual types of CAN bus data for electrical installations and full functional integration of their products.

It is the only way to access the CAN bus data and thus it can be used to read specific vehicle information and control specific vehicle functions.

The Sprinter or Metris vehicle information from the CAN bus can be evaluated and routed onto the body manufacturer CAN bus or multifunction inputs and outputs when adapting aftermarket electronic equipment or upfitting.

The control unit and the corresponding functions differ between the Sprinter and Metris model. Some described functions are only available on the specific vehicle model type.

The mode of operation for the engine function is only available in the PSM of the Sprinter.

In the Sprinter and the Mercedes-Benz Metris the programmable special module is installed in the left seat base.

Function PSM (ED5)

The modes of operation for the PSM module are different in the Sprinter and the Metris. Single described functions are only available on the specific model.

To avoid electromagnetic interference, fault codes or false signals to the electronic control units; according to the Body & Equipment Guideline, never cut into or interfere with the CAN wiring harness.

Depending on the equipped factory options codes, the PSM can be customized using up to 30 inputs or outputs.

Additionally, an Auxiliary CAN Module can be connected to the PSM to extend connectivity.

The PSM can decrease or eliminate additional wiring or relay logic due to straightforward integration into on-board power supply.

The internal PLC (programmable logic controller) is a module with freely programmable and freely interconnect able function blocks for creating any signal links that may be required

The PSM software can include logic combinations (AND, OR, NOR, XNOR etc.) of a variant of signals.

PSM signals can be processed internally in Timer, Counter and Hysteresis Blocks or Threshold Switches to trigger specified Output signals or Input functions. The PSM in the Metris has also an Arithmetic logic unit with following function:

calculating blocks; filters; integrators/differentiators; comparators; characteristics; non-volatile memory options; freely definable constants

A customized software program must be uploaded to the PSM via a Diagnostic Tool, by authorized Mercedes-Benz Canada dealer or Upfitter.

The customized PSM software dataset can be transferred to other same-type vehicles in the fleet.

The PSM Support is the authorized entity to program and provide non-standard PSM software. The aforementioned group will develop and validate the software after a program request has been submitted.

A feasibility study of all the customer desired functions is done in dialog with the Upfitter in order to address and meet all the needs.

The PSM module is included and pre-uploaded with the following optional equipment
Electronic Steps (Code T57) (Sprinter only)
Fixed High Idle (Code M53) (Sprinter only)
Variable High Idle (Code MT4) (Sprinter only)
The PSM module is suggested among others for the following equipment
Fleet Management Electronics (FMS Standard & ISO 11992-2/3)
Mobility Lifts
Additional Lights
Bucket Lifts
RV conversion
Additional Doors
Auxiliary power unit integration
Electronic Peripherals
Idle Shut down (Sprinter only)
Additional integration not included in this list may apply

PSM Technology

Examples of Vehicle Information
Vehicle Status
Doors open/closed; Doors locked/unlocked; Hand brake applied
Light Status
Side lamps; brake lights; turn signals; main-beam headlamps
Engine CAN Information
Vehicle speed; engine speed; gear selector position; Torque limitation; AC compressor
Examples of Adaptable Vehicle Function
Engine Functions (Sprinter only)
Set max Vehicle Speed; Torque and RPM parameterization
Engine Functions (Sprinter only)
Set Vehicle Speed
Light Functions
Interior/exterior lights; Turn signals; "Wig-Wag"
Central Locking
Lock/Unlock entire vehicle; Load compartment
Alarm Functions
Hazard warning flasher; Warning buzzer; Horn
Submit a PSM Request