Solara Coupe V6-3.3L (3MZ-FE) (2008)
Malfunction Indicator Lamp: Testing and Inspection
3MZ-FE ENGINE CONTROL SYSTEM: SFI SYSTEM: MIL Circuit
MIL 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.
MIL operations should be checked visually:
The MIL should be illuminated when the ignition switch is first turned to the ON position. If the MIL is always ON or OFF, use Techstream or OBD II
scan tool and follow the procedures below to determine the cause of the problem.
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT: Troubleshoot each problem symptom in accordance with the chart below.
PROCEDURE
1. CLEAR DTC
(a) Connect Techstream or OBD II scan tool to the DLC3.
(b) Turn the ignition switch to the ON position and push Techstream or the OBD II scan tool main switch ON.
(c) Read the DTC.
(d) Clear the DTC (See: Testing and Inspection/Reading and Clearing Diagnostic Trouble Codes/DTC Check / Clear).
(e) Check that the MIL is not illuminated.
OK:
MIL is not illuminated.
OK -- REPAIR CIRCUIT INDICATED BY OUTPUT DTC
NG -- Continue to next step.
2. CHECK WIRE HARNESS (CHECK FOR SHORT IN WIRE HARNESS)
(a) Disconnect the ECM connector.
(b) Turn the ignition switch to the ON position.
(c) Check that the MIL is not illuminated.
OK:
MIL is not illuminated.