DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
PERFORM ACTIVE TEST BY INTELLIGENT TESTER
CHECK HARNESS AND CONNECTOR (MAIN BODY ECU RH - BATTERY)
LIGHTING SYSTEM - Footwell Light Circuit
DESCRIPTION
The main body ECU RH receives information regarding the door lock position switches, door courtesy switches, and engine switch, and turns on each footwell light.
This illumination setting can be canceled using the light control rheostat.
WIRING DIAGRAM
INSPECTION PROCEDURE
| 1.PERFORM ACTIVE TEST BY INTELLIGENT TESTER |
Connect the intelligent tester to the DLC3.
Turn the engine switch on (IG).
Turn the intelligent tester main switch on.
Select the item(s) below in the ACTIVE TEST, and check the operation.
ACTIVE TEST: Body (Main body ECU RH)| Item | Test Details | Diagnostic Note |
| Step Light Operation | Footwell lights ON / OFF | - |
- OK:
- Footwell lights come on.
- The footwell lights RH and LH share the same power source. If either of the lights does not come on, there may be a problem in the part of the circuit that relates to that light. Therefore, inspect that part of the circuit.
| OK | |
| |
| PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE |
|
| 2.CHECK HARNESS AND CONNECTOR (MAIN BODY ECU RH - BATTERY) |
Disconnect the J75 main body ECU RH connector.
Measure the voltage according to the value(s) in the table.
- Standard voltage:
| Tester Connection | Condition | Specified Condition |
| J75-15 (FSPT) - Body ground | Always | 10 to 14 V |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
| OK | |
| |
| REPLACE MAIN BODY ECU RH (COWL SIDE J/B RH) |
|
LEXUS IS250, IS220d / GSE20 ALE20
