ES 330 V6-3.3L (3MZ-FE) (2004)
Malfunction Indicator Lamp: Testing and Inspection
MIL CIRCUIT
CIRCUIT DESCRIPTION
The MIL is used to indicate the ECM's detection of a vehicle malfunction.
The instrument panel GAUGE fuse provides the circuit power and the ECM provides the circuit ground that illuminates the MIL.
Operation of MIL should be checked visually:
When the ignition is first turned to ON, the MIL should be illuminated. If the MIL is always OFF or ON, use the hand-held tester or OBD II scan tool
and follow the procedure below to determine cause of the problem.
Wiring Diagram