Lexus IS250 IS220d GSE20 ALE20 2AD-FHV STARTING
CHECK WIRE HARNESS (ENGINE SWITCH - POWER SOURCE CONTROL ECU AND BODY GROUND)
ENTRY AND START SYSTEM - Engine Switch Indicator Circuit
DESCRIPTION
Engine start conditions or system malfunctions can be checked by the status of the engine switch indicator light.
| Power Source Mode/Condition | Indicator Light Condition | |
| Clutch pedal released | Clutch pedal depressed | |
| off | OFF | Illuminates ON (Green) |
| on (ACC, IG) | Illuminates ON (Amber) | Illuminates ON (Green) |
| Engine running | OFF | OFF |
| Steering lock not unlocked | Flashes (Green) for 30 sec. | Flashes (Green) for 30 sec. |
| System malfunction | Flashes (Amber) for 15 sec. | Flashes (Amber) for 15 sec. |
| Clutch start switch malfunction | Flashes (Green) for 15 sec. | Flashes (Green) for 15 sec. |
WIRING DIAGRAM
INSPECTION PROCEDURE
| 1.INSPECT ENGINE SWITCH |
Remove the engine switch.
Apply battery voltage between the terminals of the switch, and check the illumination condition of the switch.
- NOTICE:
If the positive (+) lead and the negative (-) lead are incorrectly connected, the engine switch indicator does not illuminate.
If the voltage is too low, the indicator will not illuminate.
- OK:
Measurement Condition Specified Condition Battery positive (+) → Terminal 11 (SWIL)
Battery negative (-) → Terminal 4 (COM) or 5 (GND)Illuminates Battery positive (+) → Terminal 12 (INDS)
Battery negative (-) → Terminal 4 (COM) or 5 (GND)Illuminates Battery positive (+) → Terminal 13 (INDW)
Battery negative (-) → Terminal 4 (COM) or 5 (GND)Illuminates
|
| ||||
| OK | |
| 2.CHECK WIRE HARNESS (ENGINE SWITCH - POWER SOURCE CONTROL ECU AND BODY GROUND) |
Disconnect the J31 switch connector.
Disconnect the J55 ECU connector.
Measure the resistance according to the value(s) in the table below.
- Standard resistance:
Tester Connection Condition Specified Condition J31-11 (SWIL) - J55-36 (SWIL) Always Below 1 Ω J31-12 (INDS) - J55-4 (INDS) Always Below 1 Ω J31-13 (INDW) - J55-13 (INDW) Always Below 1 Ω J31-5 (GND) - Body ground Always Below 1 Ω J31-4 (COM) - Body ground Always Below 1 Ω J31-11 (SWIL) or J55-36 (SWIL) - Body ground Always 10 kΩ or higher J31-12 (INDS) or J55-4 (INDS) - Body ground Always 10 kΩ or higher J31-13 (INDW) or J55-13 (INDW) - Body ground Always 10 kΩ or higher
|
| ||||
| OK | ||
| ||
LEXUS IS250, IS220d / GSE20 ALE20