GF54.21-P-6040RT Upper Control Panel Control Module Component Description

GF54.21-P-6040RT Upper Control Panel Control Module Component Description

Component Identification:

Location
The upper control panel control unit is located in the center console.

Task
Scanning the following switches:
^ ESP OFF switch (N72/1s1)
^ Left front HS [SIH] switch (N72/1s10)
^ Right front HS [SIH] switch (N72/1s11)
^ Level adjustment switch (N72/1s2)
^ Comfort/Sport switch (ADS) (N72/1s31)
^ Hazard warning system switch (N72/1s5)

Reading in the following function indicator lamps:
^ Automatic child seat recognition airbag OFF indicator lamp (N72/1e1)
^ ATA [EDW] function indicator (N72/1e2)

Voltage supply and reading in of data:
^ of exterior lamp switch (S1) over an LIN bus

Function

ESP OFF switch
The ESP Off switch can be used to switch the anti-slip control of the "Electronic Stability Program" on and off. The function requirements for this switch is circuit 15 "ON". The function of the ESP systems is indicated in the instrument cluster (A1).

Left front HS [SIH] switch and right front HS [SIH] switch
The heated seats have 3 stages. One-time actuation of the SIH switch activates stage 3 of the heated seats (all 3 red LEDs light up). Further actuations switch to stage 2 (the two lower LEDs go on), to stage 1 (the lowest LED goes on), or the heated seats are switched off (no function indicator). The function requirements for this switch is circuit 15R "ON". Each press of the left front HS [SIH] switch and right front HS [SIH] switch is sent by the upper control panel control unit over the CAN-B.

Level control switch
Function requirements:
^ Term. 15 "ON"

Switch actuations enable the driver to choose between a highway level and a raised level. The vehicle is in the highway level state (no function indicator). If the vehicle is lifted to the raised level, the LED in the switch flashes on and off. When the level is reached the LED remains constantly on. The last stage selected with function indicator is active once the engine is started again.

Comfort/Sport switch (ADS)
The driver can use the Comfort/Sport switch (ADS) to program the damping stage:
1. "AUTO" Skyhook mode
2. "SPORT" Firm damping
3. "COMFORT" Soft damping

In the "SPORT" setting the upper LED goes on and for the "COMFORT" setting the lower LED goes on. If the vehicle is in the "AUTO" mode nothing is displayed in the Comfort/Sport switch (ADS).

Hazard warning system switch
Pressing the hazard warning system switch wakes-up the upper control panel control unit from its "Sleep mode" and the hazard warning system function is activated. The message is sen cyclically (every 100 ms) until the function is deactivated by pressing the hazard warning system switch again. The flashing function illumination of the hazard warning system switch is triggered by the CAN message of the rear SAM control unit (N10/8). There is no faster flashing of a defective indicator lamp for the hazard warning flasher system. As soon as the hazard warning flasher function is activated the switch and control illumination for the hazard warning system switch is switched off. The function illumination of the hazard warning system is not dimmed.

The selected function is confirmed when the indicator lamps (LEDs) light up. The pulse to light up is sent by each respective control unit.

Discrete inputs:
^ Tml. 30
^ (Term. 31)
^ CAN-B

Discrete outputs:
^ Tml. 30
^ (Term. 31)
^ LIN bus

Voltage limit:
The operating voltage lies between 12 V and 14 V.