Rear SAM Control Unit With Fuse And Relay Module, Component Description - GF54.21-P-6030RR

Model 190 

Shown On Model 190.3 

Location 

In Model 190.3, the rear SAM control unit is located under the panel in the trunk at the left.

In Model 190.4, the rear SAM control unit is located in the rear end between the two roll bars.

Task 

The rear SAM control unit has the following tasks:

• Reading in of sensors and signals 
• Evaluation of input factors 
• Controlling functions 
• Actuation of components 

The fuse and relay module of the rear SAM control unit supplies various systems and control units with power via limit switches, depending on the function sequence in question.

The following tasks are the responsibility of the fuse and relay module:

• Voltage supply to components 
• Power supply and relay switching 
• Switching consumers using relays 

Detailed information is available in the "Fuse and relay box, as-built configuration" function description.

Reading in of sensors and signals 

The input factors are read in over the following connections:

• Direct line 
• Local Interconnect Network (LIN) 
• Interior CAN (CAN B) 

Direct line 

The signals from the following components are read via direct lines:

• Liftgate latch main catch switch (A85/5s1)
• Tank cap central locking actuator (M14/10)
• Electronic Stability Program control unit (N30/4)
• Left engine hood contact switch (S62/43) (with CODE 551 (Anti-theft alarm system (ATA)))

LIN 

The signals from the following components are read in via LIN:

• Electronics in the on-board electrical system battery (G1) via battery sensor LIN (LIN B15)
• Alarm sirens (H3/1) (with CODE 551 (Anti-theft alarm system (ATA)) and CODE 882 (Interior monitoring)) via alarm systems LIN (LIN B14)
• Interior protection sensor (A26/13) (with CODE 551 (Anti-theft alarm system (ATA)) and CODE 882 (Interior monitoring)) via alarm system LIN

Interior CAN 

The signals are read in by the rear SAM control unit over the interior CAN.

The functions that use these signals are described in the individual function descriptions (see block diagram or function schematic).

Evaluation of input factors 

The input factors are evaluated by the microprocessor and the corresponding components are actuated.

Controlling functions 

The rear SAM control unit controls the following functions

• Energy management
• Rear area exterior lights
• Heated rear window
• Seat heater (with CODE 873 (Seat heater for driver and front passenger))
• Anti-theft alarm system (with CODE 551 (Anti-theft alarm system (ATA)))

Actuation of components 

The actuation of the components takes place via the following connections:

• Direct line 
• LIN 
• Interior CAN 

Direct line 

The following components are actuated via direct lines:

• Liftgate latch motor (A85/5m1)
• Left rear lamp unit (E3):
  • Left rear turn signal lights (E3e1)
  • Left taillight (E3e18)
• Right rear lamp unit (E4):
  • Right rear turn signal lights (E4e1)
  • Right taillight (E4e18)
• Center rear lamp unit (E7):
  • Rear fog light (E7e1) (except CODE 460 (Canada version) and except CODE 494 (USA version))
  • Backup lamp (E7e2)
• Cargo area lamp (E18/5)
• Left license plate lamp (E19/1)
• Right license plate lamp (E19/2)
• Center brake lamp (E21)
• Liftgate warning/ambient lamp (E17/27)
• Tank cap central locking actuator
• Rear window heater (R1)
• Tank cap central locking actuator (M14/10)
• Glove compartment central locking actuator motor (M14/18) (Model 190.4)

• With CODE 873 (Seat heater for driver and front passenger):
  • Left seat surface heater pad (R13/1)
  • Left backrest heater pad (R13/2)
  • Right seat surface heater pad (R13/3)
  • Right backrest heater pad (R13/4)
• Left engine hood contact switch (S62/43)
• Trunk lid external operation switch (S88/8)
• Trunk lid emergency opening switch (S88/10) (Model 190.4 with CODE 460 (Canada version) and CODE 494 (USA version))

LIN 

The rear SAM control unit actuates the alarm sirens (with CODE 551 (Anti-theft alarm system (ATA)) and CODE 882 (Interior monitoring)) via the alarm systems LIN.

Interior CAN 

The signals are sent over the interior CAN by the rear SAM control unit.

The functions that use these signals are described in the individual function descriptions (see block diagram or function schematic).

	Wiring diagram for rear SAM control unit with fuse and relay module (N10/2)	Model 190 Sheet 1	PE54.21-P-2108-97HBA
		Model 190 Sheet 2	PE54.21-P-2108-97HBB