Lexus IS250 IS220d GSE20 ALE20 4GR-FSE STARTING
ENTRY AND START SYSTEM - ON-VEHICLE INSPECTION
1. CHECK POWER SOURCE MODE CHANGE FUNCTION |
Check the function of the engine switch.
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. off → engine start on (ACC) → engine start on (IG) → engine start |
Not depressed | P position | Each time the engine switch is pushed. off → on (ACC) → on (IG) → off |
Except P Position | Each time the engine switch is pushed. off → on (ACC) → on (IG) → on (ACC) | |
- | P Position | When the engine switch is pushed in the on (IG) condition (engine running). on (IG) → off |
- | Except P Position | When the engine switch is pushed in the on (IG) condition (engine running). on (IG) → on (ACC) |
M/T Models: Start function has different power source mode patterns to suit the clutch pedal condition.
Clutch Pedal | Power Source Mode Pattern |
Depressed | When the engine switch is pushed once. off → engine start on (ACC) → engine start on (IG) → engine start |
Not depressed | Each time the engine switch is pushed. off → on (ACC) → on (IG) → off |
- | When the engine switch is pushed in the on (IG) condition (engine running). on (IG) → off |
Check if power source mode changes without pressing the engine switch.
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.
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.
2. CHECK INDICATOR CONDITION |

Check the indicator on the engine switch.
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) (Key ID matches vehicle) | Turns ON (Green) (Key ID matches vehicle) |
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. |