gf4340w1003f

Brake pedal PMR deactivation switch, component description

Type gf · topic 43.40 · version 0100 · 2011-09-19

Applies to: MODEL 970, 974 with CODE (BA2) Permanent magnet retarder

Where it sits

Function group 2 Chassis › 43 Brakes - pneumatic system and auxiliary brakes › 43.40 Retarder (electric) — Series 970 · Series 974

GF43.40-W-1003F

Brake pedal PMR deactivation switch, component description

12.9.11

MODEL 970, 974 with CODE (BA2) Permanent magnet retarder

Brake pedal PMR deactivation switch, component description

W43.40-1085-11

Location

S201 Brake pedal PMR deactivation switch

The brake pedal PMR deactivation switch (S201) is on the right in the instrument panel.

Task

The brake pedal PMR deactivation switch (S201) is used to switch on/off activation of the permanent magnet retarder by depressing the brake pedal or by actuating the engine control/permanent brake operating lever (S2) (e.g. deactivation when performing the service brake test or in maneuvering mode).

The all-wheel drive neutral/Allison neutral/parking brake/PMR brake pedal relay (relay holder A31) (K1-A25) is supplied with ground via the brake pedal PMR deactivation switch (S201). Pressing the brake pedal PMR deactivation switch (S201) interrupts ground of the switching voltage at the all-wheel drive neutral/Allison neutral/parking brake/PMR brake pedal relay (relay holder A31) (K1-A25) and, therefore, the electric circuit of

circuit 15.