Malfunction Indicator Lamp: Testing and Inspection
A: INDICATOR LAMP (MIL) DOES NOT COME ON.DIAGNOSIS:
- The CHECK ENGINE malfunction indicator lamp (MIL) circuit is open or shorted.
TROUBLE SYMPTOM:
- When ignition switch is turned ON (engine OFF), MIL does not come on.
PROCEDURES:
WIRING DIAGRAM:
B: CHECK ENGINE MALFUNCTION INDICATOR LAMP (MIL) DOES NOT GO OFF.
DIAGNOSIS:
- The CHECK ENGINE malfunction indicator lamp (MIL) circuit is shorted.
TROUBLE SYMPTOM:
- Although MIL comes on when engine runs, trouble code is not shown on Subaru select monitor or OBD-II general scan tool display.
PROCEDURES:
WIRING DIAGRAM:
C: CHECK ENGINE MALFUNCTION INDICATOR LAMP (MIL) DOES NOT BLINK AT A CYCLE OF 3 HZ.
DIAGNOSIS:
- The CHECK ENGINE malfunction indicator lamp (MIL) circuit is open or shorted.
- Diagnosis connector circuit is in open TROUBLE SYMPTOM:
- When inspection mode MIL does not blink at a cycle of 3 Hz.
PROCEDURES:
WIRING DIAGRAM:
D: CHECK ENGINE MALFUNCTION INDICATOR LAMP (MIL) REMAINS BLINKING AT A CYCLE OF 3 Hz.
DIAGNOSIS:
- Diagnosis connector circuit is shorted.
TROUBLE SYMPTOM:
- Even though diagnosis connector is disconnected, MIL blinks at a cycle of 3 Hz when ignition switch is turned to ON.
PROCEDURES:
WIRING DIAGRAM: