LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Subaru >> 2021 >> Ascent Base >> Repair and Diagnosis >> Brakes >> Traction Control >> Brake Control System (Diagnostics) >> Control Module I/O Signal >> Electrical Specification
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Electrical Specification

G13866941Courtesy of SUBARU OF AMERICA, INC.
NOTE:
  • Terminal numbers in VDCCM&H/U connector (on the control module side) are shown in the figure.
  • When the connector is removed from the VDCCM&H/U, the brake warning light (EBD warning light), ABS warning light, VDC warning light & VDC operation indicator light and VDC OFF indicator light illuminate.
Terminal No. Contents Measuring condition Standard
(B310) No. 1 ←→ Chassis ground VDC pump motor power supply Always Battery voltage
(B310) No. 2 RH rear brake caliper (+) - -
(B310) No. 3 RH rear brake caliper (-) - -
(B310) No. 4 FR ABS wheel speed sensor GND - -
(B310) No. 5 FR ABS wheel speed sensor signal - -
(B310) No. 6 RL ABS wheel speed sensor GND - -
(B310) No. 7 RL ABS wheel speed sensor signal - -
(B310) No. 8 FL ABS wheel speed sensor GND - -
(B310) No. 9 FL ABS wheel speed sensor signal - -
(B310) No. 10 RR ABS wheel speed sensor GND - -
(B310) No. 11 RR ABS wheel speed sensor signal - -
(B310) No. 12 LH rear brake caliper (-) - -
(B310) No. 13 LH rear brake caliper (+) - -
(B310) No. 14 Ground - -
(B310) No. 17 Electronic parking brake switch - -
(B310) No. 18 Electronic parking brake switch - -
(B310) No. 19 Electronic parking brake switch - -
(B310) No. 20 Electronic parking brake switch - -
(B310) No. 23 Brake booster pressure sensor output signal - -
(B310) No. 24 ←→ Chassis ground Brake booster pressure sensor power supply Ignition switch: ON 4.85 - 5.15 V
(B310) No. 26 ←→ Chassis ground Electronic parking brake indicator light Always Battery voltage
(B310) No. 27 ←→ Chassis ground Brake fluid level switch Ignition switch: ON 6 V or more
(B310) No. 28 VSO PIN output - -
(B310) No. 29 Brake booster pressure sensor GND - -
(B310) No. 30 ←→ Chassis ground VDCCM power supply Always Battery voltage
(B310) No. 31 ←→ Chassis ground Stop light switch Brake pedal operation Brake ON: Battery voltage
Brake OFF: Ground
(B310) No. 33 ←→ Chassis ground AVH switch Ignition switch: ON Ignition power supply voltage
(B310) No. 35 ←→ Chassis ground Ignition power supply Ignition switch: ON Ignition power supply voltage
(B310) No. 39 ←→ Chassis ground VDC OFF switch VDC OFF switch operation Switch ON: 1 Ω or less
Switch OFF: 1 MΩ or more
(B310) No. 41 ←→ Chassis ground Stop light switch output Ignition switch: ON Ignition power supply voltage
(B310) No. 42 CAN-H - -
(B310) No. 43 CAN-L - -