2020 Subaru Ascent BaseFACTORY OEM SERVICE PROCEDURE

Power Seat Control Module

G13203641Courtesy of SUBARU OF AMERICA, INC.
Terminal No. [Contents] Measuring condition Standard
(R155) No. 1 - - -
(R155) No. 2 ↔ Chassis ground Lifter switch (down) Switch ON 1.5 V or less
(R155) No. 3 ↔ Chassis ground Lifter switch (up) Switch ON 1.5 V or less
(R155) No. 4 ↔ Chassis ground Tilt switch (down) Switch ON 1.5 V or less
(R155) No. 5 ↔ Chassis ground Tilt switch (up) Switch ON 1.5 V or less
(R155) No. 6 ↔ Chassis ground Slide switch (forward) Switch ON 1.5 V or less
(R155) No. 7 ↔ Chassis ground Slide switch (rearward) Switch ON 1.5 V or less
(R155) No. 8 ↔ Chassis ground Reclining switch (forward) Switch ON 1.5 V or less
(R155) No. 9 ↔ Chassis ground Reclining switch (backward) Switch ON 1.5 V or less
(R155) No. 10 ↔ Chassis ground Battery power supply Always 10 - 16 V
(R155) No. 11 ↔ Chassis ground Ignition power supply When ignition switch is ON 10 - 16 V
(R155) No. 12 LIN communication line Unmeasurable -
(R155) No. 13 ↔ Chassis ground Memory switch 1 Switch ON 1 V or less
(R155) No. 14 ↔ Chassis ground Memory switch 2 Switch ON 1 V or less
(R155) No. 15 ↔ Chassis ground SET switch Switch ON 1 V or less
(R155) No. 16 ↔ (R155) No. 20 Reclining pulse signal When the motor is in operation Pulse output
(R155) No. 17 ↔ (R155) No. 20 Tilt pulse signal When the motor is in operation Pulse output
(R155) No. 18 ↔ (R155) No. 20 Lifter pulse signal When the motor is in operation Pulse output
(R155) No. 19 ↔ (R155) No. 20 Slide pulse signal When the motor is in operation Pulse output
(R155) No. 20 ↔ Chassis ground Pulse signal GND Always 1 Ξ© or less
(R156) No. 1 ↔ Chassis ground Lifter motor up When the motor is in operation 9.5 - 16 V
(R156) No. 2 ↔ Chassis ground Lifter motor down When the motor is in operation 9.5 - 16 V
(R156) No. 3 ↔ Chassis ground Battery power supply Always 10 - 16 V
(R156) No. 4 ↔ Chassis ground Tilt motor up When the motor is in operation 9.5 - 16 V
(R156) No. 5 ↔ Chassis ground Tilt motor down When the motor is in operation 9.5 - 16 V
(R156) No. 6 ↔ Chassis ground Reclining motor forward When the motor is in operation 9.5 - 16 V
(R156) No. 7 ↔ Chassis ground Reclining motor backward When the motor is in operation 9.5 - 16 V
(R156) No. 8 ↔ Chassis ground Battery power supply Always 10 - 16 V
(R156) No. 9 ↔ Chassis ground Encoder power supply output Always 1 MΞ© or more
(R156) No. 10 - - -
(R156) No. 11 - - -
(R156) No. 12 ↔ Chassis ground GND Always 1 Ξ© or less
(R156) No. 13 - - -
(R156) No. 14 ↔ Chassis ground GND Always 1 Ξ© or less
(R156) No. 15 ↔ Chassis ground Slide motor rearward When the motor is in operation 9.5 - 16 V
(R156) No. 16 ↔ Chassis ground Slide motor forward When the motor is in operation 9.5 - 16 V
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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • β€’ You smell fuel, burning insulation, or see smoke.
  • β€’ Brakes feel soft, pull hard to one side, or make grinding noises.
  • β€’ The engine overheats, stalls repeatedly, or misfires under load.
  • β€’ You are missing required tools, torque specs, or safe lifting equipment.
  • β€’ You are not confident in the next step or safety outcome.

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