Upper Control Panel Control Unit, Component Description - GF54.21-D-6040H

MODEL 906 

Shown with CODE HH9 (Regulated air conditioning, (Tempmatic)) as of facelift 2013 

Courtesy of MERCEDES-BENZ USA

Shown with CODE HH9 (Regulated air conditioning, (Tempmatic)) up to facelift 2013 

Courtesy of MERCEDES-BENZ USA

Location 

The upper control panel (UCP) control unit is located in the center of the instrument panel above the gearshift lever (with transmission 711.6 or 716.6) or electronic selector lever module control unit (N15/5) (with transmission 722.6 or 722.9).

Task 

The upper control panel (UCP) control unit reads in the integrated switches and buttons, controls the light emitting diodes (LED) of the integrated switches and buttons, is the master control unit for the seat heaters (SIH) (with CODE H16 (Heater for driver seat) or with CODE H15 (Heater for front passenger seat)) and is connected to the interior CAN (CAN B).

Generally the UCP control unit controls the following systems with the corresponding functions or supports the master control units:

• Electric sliding door for load compartment (E-LST), with CODE T55 (Electrical actuation for right sliding door) or with CODE T56 (Electrical actuation for left sliding door)
  • Switch request E-LST "OPEN" or "CLOSE" for left or right E-LST
• SIH, with CODE H16 (Heater for driver seat)
  • Actuation of left front seat cushion heater pad (R13/1)
  • Actuation of left front backrest heater pad (R13/2)
• SIH, with CODE H15 (Heater for front passenger seat)
  • Actuation of right front seat cushion heater pad (R13/3)
  • Actuation of right front backrest heater pad (R13/4)
• Heated rear window (HHS), with CODE H22 (Heated rear window) or with CODE W78 (Window in liftgate or hinged rear door with wipe/washer system)
  • Switch request for HHS "ON" or "OFF"
• Heated windshield (HFS), with CODE F49 (Heated windshield)
  • Switch request for HFS "ON" or "OFF"
• Electronic Stability Program (ESP®)
  • Switch request for acceleration skid control (ASR) "ON" or "OFF"
• Central locking (ZV)
  • Switch request for central locking interior and rear-end door release "OPEN" or "CLOSE"
• Parktronic system (PTS), with CODE EZ8 (Parktronic system (PTS))
  • Switch request for PTS "ON" or "OFF"
• Anti-theft alarm system (ATA), with CODE FZ5 (Anti-theft alarm system (ATA [EDW])), with CODE FZ4 (Breaking and entering/antitheft alarm system with interior protection and tow-away protection) or with CODE FY1 (ATA 2 mit interior protection, tow-away protection and rechargeable-battery horn)
  • Actuation of LED in interior central locking button (N72/1s7)
• Engine start/stop (MSS), with CODE MJ7 (ECO start)
  • Switch request for MSS "ON" or "OFF"
• Blind Spot Assist (TWA), with CODE JA7 (Blind Spot Assist)
  • Switch request for TWA "ON" or "OFF"
• Lane Keeping Assist (SHA), with CODE JW5 (Lane Keeping Assist)
  • Switch request for SHA "ON" or "OFF"
• COLLISION PREVENTION ASSIST, with CODE JA6 (COLLISION PREVENTION ASSIST)
  • Switch request for COLLISION PREVENTION ASSIST "ON" or "OFF"

The upper control panel control unit (UCP) reads in the following switches and buttons:

• Left sliding door button (N72/1s1), with CODE T56 (Electrical actuation for left sliding door)
• Left seat heater button (N72/1s2), with CODE H16 (Heater for driver seat)
• Rear window heater button (N72/1s3), with CODE H22 (Heated rear window) or with CODE W78 (Window in liftgate or hinged rear door with wipe/wash system)
• Windshield heater button (N72/1s4), with CODE F49 (Heated windshield)
• ASR OFF button (N72/1s5)
• Hazard warning system switch (N72/1s6)
• Interior central locking button
• PARKTRONIC OFF button (N72/1s9), with CODE EZ8 (Parktronic system (PTS))
• Right seat heater button (N72/1s10), with CODE H15 (Heater for front passenger seat)
• Right sliding door button (N72/1s11), with CODE T55 (Electrical actuation for right sliding door)
• ECO button (N72/1s12), with CODE MJ7 (ECO start)
• Blind Spot Assist button (N72/1s13), with CODE JA7 (Blind Spot Assist)
• Lane Keeping Assist button (N72/1s14), with CODE JW5 (Lane Keeping Assist)
• COLLISION PREVENTION ASSIST button (N72/1s15), with CODE JA6 (COLLISION PREVENTION ASSIST)

In addition, the upper control panel control unit (UCP) communicates with the following control units via interior CAN:

• With electronic ignition lock control unit (EZS) (N73)
  • The upper control panel control unit (UCP) transmits, e.g. "CL_IT (interior central locking button actuated)"
  • The upper control panel control unit (UCP) receives, e.g. "CL_ST (CL status)"
• With the instrument cluster (A1)
  • The upper control panel control unit (UCP) receives, e.g. "KL_58D_B (instrument illumination brightness)"
• With the SAM control unit (N10)
  • The upper control panel control unit (UCP) transmits, e.g. "HHS_ON (EIN) (switch on HHS)"
  • The upper control panel control unit (UCP) receives, e.g. "HHS_ON (AN) (HHS is switched on)"
• With STL control unit (N69/7), with CODE T56 (Electrical actuation for left sliding door)
  • The upper control panel control unit (UCP) transmits, e.g. "ANST_STL (left E-LST actuation)"
  • The upper control panel control unit (UCP) receives, e.g. "STL_LED (actuation of left sliding door LED button)"
• With the STR control unit (N69/6), with CODE T55 (Electrical actuation for right sliding door)
  • The upper control panel control unit (UCP) transmits, e.g. "ANST_STR (right E-LST actuation)"
  • The upper control panel control unit (UCP) receives, e.g. "STR_LED (actuation of right sliding door LED button)"
• With the overhead control panel (OCP) control unit (N70), with CODE LD0 (Dome lamp with reading lights for driver/front passenger) and with CODE FZ5 (Anti-theft alarm system (ATA) or with CODE FZ4 (Breaking and entering/antitheft alarm system with interior protection and tow-away protection) or with CODE FY1 (ATA 2 with interior protection, tow-away protection and rechargeable-battery horn)
  • The upper control panel (UCP) control unit receives, e.g. "ATA_ST (ATA status)"
• With the parameterizable special module (PSM) control unit (N26/15), with CODE ED5 (Parameterizable special module (PSM))
  • The upper control panel (UCP) control unit transmits, e.g. "WBL_ON (Hazard warning flashers on)
  • The upper control panel (UCP) control unit receives, e.g. "PSM_HHS_ON (switch on HHS from parameterizable special module (PSM) control unit)"
• With the PARKTRONIC control unit (N62), with CODE EZ8 (Parktronic system (PTS))
  • The upper control panel (UCP) control unit transmits, e.g. "PTS (PARKTRONIC OFF button actuated)"
  • The upper control panel (UCP) control unit receives, e.g. "PTS_ST_OFF (PTS completely switched off)"

In addition, the upper control panel (UCP) control unit communicates with the following components and control units via interior CAN, electronic ignition lock control unit (EZS) and engine CAN (CAN C):

• CDI control unit (N3/28), with engine 651 and with CODE MJ7 (ECO start)
• CDI control unit (N3/30), with engine 642.8 and with CODE MJ7 (ECO start)
• Right rear radar sensor (B161/1), with CODE JA7 (Blind Spot Assist)
• Left side radar sensor (B161/2), with CODE JA7 (Blind Spot Assist)
• Right side radar sensor (B161/3), with CODE JA7 (Blind Spot Assist)
• Left rear radar sensor (B161/4), with CODE JA7 (Blind Spot Assist)
• Multifunction camera (B84/8), with CODE JW5 (Lane Keeping Assist)
• COLLISION PREVENTION ASSIST control unit (B162), with CODE JA6 (COLLISION PREVENTION ASSIST)

The upper control panel (UCP) control unit evaluates the switching states, messages and feedback from the individual systems and then controls the following switch and button LEDs in the appropriate manner:

• The LED of left sliding door button, with CODE T56 (Electrical actuation for left sliding door), is permanently actuated or it flashes on and off.
• The LEDs of left seat heater button, with CODE H16 (Heater for driver seat), are actuated permanently or it flashes on and off.
• The LED of the rear window heater button, with CODE H22 (Heated rear window) or with CODE W78 (Window in liftgate or hinged rear door with wipe/wash system), is actuated permanently or it flashes on and off.
• The LED of the windshield heater button, with CODE F49 (Heated windshield), is actuated permanently or it flashes on and off.
• The LED of the hazard warning system switch flashes on and off.
• The LED of interior central locking button is actuated permanently or it flashes on and off.
• The LED of PARKTRONIC OFF button, with CODE EZ8 (Parktronic system (PTS)), is actuated permanently or it flashes on and off.
• The LEDs of right seat heater button, with CODE H15 (Heater for front passenger seat), are actuated permanently or it flashes on and off.
• The LED of right sliding door button, with CODE T55 (Electrical actuation for right sliding door), is permanently actuated or it flashes on and off.
• The LED of ECO button, with CODE MJ7 (ECO start), is actuated permanently.
• The LED of Blind Spot Assist button, with CODE JA7 (Blind Spot Assist), is actuated permanently.
• The LED of Lane Keeping Assist button, with CODE JW5 (Lane Keeping Assist), is actuated permanently.
• The LED of COLLISION PREVENTION ASSIST button, with CODE JA6 (COLLISION PREVENTION ASSIST), is actuated permanently.

Design shown as of facelift 2013, with CODE T56 (Electrical actuation for left sliding door), with CODE H16 (Heater for driver seat), with CODE H22 (Heated rear window) or with CODE W78 (Window in liftgate or hinged rear door with wipe/wash system), with CODE F49 (Heated windshield), with CODE EZ8 (Parktronic system (PTS)), with CODE H15 (Heater for front passenger seat), with CODE T55 (Electrical actuation for right sliding door), with CODE MJ7 (ECO start), with CODE JA7 (Blind Spot Assist), with CODE JW5 (Lane Keeping Assist) and with CODE JA6 (COLLISION PREVENTION ASSIST) 

Courtesy of MERCEDES-BENZ USA

Design shown up to facelift 2013, with CODE T56 (Electrical actuation for left sliding door), with CODE H16 (Heater for driver seat), with CODE H22 (Heated rear window) or with CODE W78 (Window in liftgate or hinged rear door with wipe/wash system), with CODE F49 (Heated windshield), with CODE EZ8 (Parktronic system (PTS)), with CODE H15 (Heater for front passenger seat) and with CODE T55 (Electrical actuation for right sliding door) 

Courtesy of MERCEDES-BENZ USA

Up to model refinement package 2013

The respective switches of the upper control panel control unit (UCP) are designed as rocker switches. If the upper control panel (UCP) control unit detects the actuation of the respective button for t ≥ 25 s, then the signal will be ignored and a fault stored. No actuation signal is sent to the interior CAN.

When the respective button is actuated again, the upper control panel (UCP) control unit must detect beforehand the rest position of the respective button for t > 1 s.