Pedal Pressure Sensor/Check Valve (Same Connector)

Type

Pedal pressure sensor: Two-pin, quickshifter located within the brake servo on the brake servo pushrod

Check valve: Electric coil with magnet core and valve

Characteristic pedal pressure sensor

Resistance between terminals #1 and #5 should be infinite when the brake pedal is not actuated and 0 Ω when the brake pedal is depressed

Resistance between terminals #2 and #5 should be 0 Ω when the brake pedal is not actuated and infinite when the brake pedal is depressed

Characteristic, check valve

Resistance between terminals #3 and #4 should be approx. 3 Ω.

Check, pedal pressure sensor

Prerequisites (unless otherwise specified):

Check

Check 1, pedal pressure sensor

Voltage betwen terminals #21 (#A21) and #23 (#A23) should be 0 V when the brake pedal is not actuated and 12 V when the brake pedal is depressed.

Voltage betwen terminals #21 (#A21) and #24 (#A24) should be 12 V when the brake pedal is not actuated and 0 V when the brake pedal is depressed.

Check 1, check valve

Voltage between terminals #17 (A#17) and #31 (#A31) should be 12 V.

Fig 1: Identifying Pedal Pressure Sensor Terminals

Courtesy of VOLVO CARS CORPORATION