Lexus IS250 · Service Manual ENGINE

ON-VEHICLE INSPECTION

Inspection


CHECK POWER SOURCE MODE CHANGE FUNCTION

  1. Check the function of the engine switch.

    1. A/T Models: Check that power source mode changes in accordance with the conditions of the shift position and brake pedal.

      Brake Pedal
      		 Shift Lever
      		 Power Source Mode Pattern
      Depressed
      		 P or N Position
      		 When the engine switch is pushed once.
      1. off → engine start
      Not depressed
      		 P position
      		 Each time the engine switch is pushed.
      1. off → on (ACC) → on (IG) → off
      Except P Position
      		 Each time the engine switch is pushed.
      1. off → on (ACC) → on (IG) → on (ACC)
      -
      		 P Position
      		 When the engine switch is pushed in the on (IG) condition (engine running).
      1. on (IG) → off
      -
      		 Except P Position
      		 When the engine switch is pushed in the on (IG) condition (engine running).
      1. on (IG) → on (ACC)

    2. M/T Models: Start function has different power source patterns to suit the clutch pedal condition.

      Clutch Pedal
      		 Power Source Mode Pattern
      Depressed
      		 When the engine switch is pushed once.
      1. off → engine start
      Not depressed
      		 Each time the engine switch is pushed.
      1. off → on (ACC) → on (IG) → off
      -
      		 When the engine switch is pushed in the on (IG) condition (engine running).
      1. on (IG) → off

  1. Check if power source mode changes without pressing the engine switch.

    1. A/T Models: With power source mode on (ACC) and the shift position in P, wait for at least 1 hour. Check that power source mode changes from on (ACC) to off automatically.

    2. M/T Models: With power source mode on (ACC), wait for at least 1 hour. Check that power source mode changes from on (ACC) to off automatically.


CHECK INDICATOR CONDITION

A109251E01

  1. Check the indicator on the engine switch.

    1. Check that the engine switch indicator turns on and changes color according to the table below.

      Power Source Mode/Condition
      		 Indicator Light Condition
      Brake pedal released (A/T)
      Clutch pedal released (M/T)
      		 Brake pedal depressed, shift lever in P or N (A/T)
      		 Clutch pedal depressed (M/T)
      off
      		 OFF
      		 Turns ON (Green)
      		 Turns ON (Green)
      on (ACC, IG)
      		 Turns ON (Amber)
      		 Turns ON (Green)
      		 Turns ON (Green)
      Engine running
      		 OFF
      		 OFF
      		 OFF
      Steering lock not unlocked
      		 Flashes (Green) for 30 sec.
      		 Flashes (Green) for 30 sec.
      		 Flashes (Green) for 30 sec.
      System malfunction
      		 Flashes (Amber) for 15 sec.
      		 Flashes (Amber) for 15 sec.
      		 Flashes (Amber) for 15 sec.
      Clutch start switch malfunction (M/T)
      		 Flashes (Green) for 15 sec.
      		 Flashes (Green) for 15 sec.
      		 Flashes (Green) for 15 sec.

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