IS 250 AWD V6-2.5L (4GR-FSE) (2006)
Malfunction Indicator Lamp: Testing and Inspection
MIL Circuit
DESCRIPTION
The MIL (Malfunction Indicator Lamp) is used to indicate malfunction detections by the ECM. By turning the engine switch on (IG), power is supplied
to the MIL circuit, and the ECM provides the circuit ground, which illuminates the MIL.
The MIL operation can be checked visually: When the engine switch is first turned on (IG), the MIL should be illuminated and should then turn off. If
the MIL remains illuminated or is not illuminated, conduct the following troubleshooting procedure using the intelligent tester.
Wiring Diagram