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Home >> Subaru >> 2021 >> Ascent Base >> Repair and Diagnosis (Single Page) >> Accessories & Equipment >> Anti-Theft Systems >> Anti-Theft System - Security And Locks >> Keyless Access With Push Button Start System >> Inspection >> Power Supply Switching Function Check

Power Supply Switching Function Check

  1. Check push button ignition switch function
    1. Check the power supply switching control function with push button ignition switch operation, brake pedal operation, and select lever position.
      Select lever position Brake pedal operation Push button ignition switch operation
      P Released Repeat Ignition switch OFF → ACC ON → Ignition switch
      ON → Ignition switch OFF
      P Released Engine running → Ignition switch OFF
      P Depressed Ignition switch OFF → Engine started
      P Depressed ACC ON → Engine started
      P Depressed Ignition switch ON → Engine started
      P Depressed Engine running → Ignition switch OFF
      N Released Repeat Ignition switch OFF → ACC ON → Ignition switch ON → ACC ON
      N Released Engine running → ACC ON
      N Depressed Ignition switch OFF → Engine started
      N Depressed ACC ON → Engine started
      N Depressed Ignition switch ON → Engine started
      N Depressed Engine running → ACC ON
      Except for P and N Released Repeat Ignition switch OFF → ACC ON → Ignition switch ON → ACC ON
      Except for P and N Released Engine running → ACC ON
      Except for P and N Depressed Ignition switch OFF → Ignition switch ON
      Except for P and N Depressed ACC ON → Ignition switch ON
      Except for P and N Depressed Engine running → ACC ON
    2. Check the power supply switching functions with other than the push button ignition switch operation. With ACC ON or the ignition switch ON, and with the select lever in "P" position, check that ACC is ON or that the ignition switch changes ON → OFF when the vehicle is left for 1 hour or more.
    3. If the inspection result indicates an improper operation, check the push button start system. Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>Diagnostics with Phenomenon>LIST>POWER SUPPLY SWITCHING SYSTEM .
  2. Check power status display
    1. Check the power indicator display of the push button ignition switch.
      NOTE: -1: Key collation is normal, and the stop light switch (CVT) is ON.

      Indicator display

      Push button ignition switch status Indicator lighting status
      Ignition switch OFF (except for condition *1) Light OFF
      ACC ON (except for condition *1) Orange light
      Ignition switch ON (except for condition *1) Orange light
      Engine start standby Green light
      After engine is started Light OFF
    2. If the inspection result indicates an improper operation, check the push button start system. Ref. to KEYLESS ACCESS WITH PUSH BUTTON START (DIAGNOSTICS)>Diagnostics with Phenomenon>LIST>POWER SUPPLY SWITCHING SYSTEM .
      NOTE: The indicator blinks if any of the following malfunctions are detected.
      Detected malfunction Indicator lighting status
      Steering lock stuck Green blinking
      Steering lock control moduleinternal malfunction Orange blinking
      Keyless access control module internal malfunction Orange blinking
      Vehicle speed signal malfunction Orange blinking