Lower control panel control unit, component description - GF54.21-P-6060GZA

MODEL 164.8 with CODE (430) Offroad package 

Location 

The lower control panel control unit is located in the center console.

Task 

Scanning the following switches: 

• Downhill Speed Regulation switch (N72s30)
• Low Range switch (N72s31)
• Differential lock thumb wheel (N72s34)
• Level control selector wheel, low (N72s35)

Reading in the following function indicator lamps: 

• Level control function indicator (N72e4)

Function 

Downhill Speed Regulation switch (DSR) 

The driver can switch the DSR on and off using the Downhill Speed Regulation switch. A red LED integrated into the switch indicates whether the function is active or not. Downhill Speed Regulation is an aid for driving down hills with an adjustable speed that can be set between 4 and 18 km/h.

Low Range switch 

Via the Low Range switch the driver can switch from the on-road ratio (High) to the off-road ratio (Low). A red LED integrated into the switch provides indicates the current operating condition.

Turning the level control selector wheel 

Function requirements: 

• Term. 15 "ON"

Function: 

By turning the level control selector wheel to the right the driver can raise the vehicle level up to the Offroad level 3 and lower down to the Highway level by turning to the left. The associated LED in the level control function indicator flashes until the level is reached in each case. When the level is reached the LED remains constantly on.

If the Highway level is reached, there is no display in the level control function indicator.

Differential lock thumb wheel 

The driver can use the differential lock thumb wheel to select various stages (transfer case and rear axle differential lock):

1. A Automatic locking of the transfer case (interaxle differential lock) and rear axle differential (interwheel differential lock).
2. B The transfer-case differential (interaxle differential lock) is manually locked (100 %), the rear axle differential (interwheel differential lock) is automatically locked.
3. C The transfer case (interaxle differential lock) and rear axle differential (interwheel differential lock) are manually locked (100 %).

Discrete inputs: 

• Circuit 30
• Circuit 31
• LIN bus

The lower control panel control unit is not a direct user of CAN-B, but rather it is connected via a LIN bus to the upper control panel control unit (N72/1) to CAN-B.