2020 Subaru Ascent BaseFACTORY OEM SERVICE PROCEDURE

Throttle Sensor (Method With SUBARU Select Monitor)

  1. Turn the ignition switch to ON. (Engine OFF)
  2. Read the accelerator opening angle signal and throttle sensor voltage using Subaru Select Monitor. Ref. to ENGINE (DIAGNOSTICS) (H4DOTC)>DATA MONITOR .
    NOTE: Due to the specification of the Subaru Select Monitor, value read from the accelerator opening angle signal is highlighted and displayed as the voltage readings of sub throttle sensor.
Throttle sensor Accelerator pedal Acceleration opening angle signal Standard
Main Not depressed (full closed) 0.0% Approx. 0.7 V
Depressed (full opened) 100.0% Approx. 3.9 V
Sub Not depressed (full closed) 0.0% Approx. 0.7 V
Depressed (full opened) 100.0% Approx. 3.9 V
Factory Service Tools

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.

Shop Manual-Ready ToolsCompare Repair QuoteQuote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

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

Rather have a pro handle this?

A certified mobile mechanic comes to your home or office. They bring the tools, you stay comfortable. No tow truck, no waiting room, no surprises.

Comes to youSame-day available12-month warranty
Get a Free Quote

No obligation. See pricing before you book.