Diagnosis Procedure

1. Turn OFF the headlamp.
2. Ignition switch OFF.
3. Disconnect ECO mode switch harness connector.
4. Ignition switch ON.
5. Check voltage between ECO mode switch harness connector terminals.

   ECO mode switch			Voltage (Approx.)
   Connector	+	-
   	Terminal
   M152	6	8	9 - Battery voltage

Is the inspection result normal?

YES

GO TO 5.

NO

GO TO 2.

1. Ignition switch OFF.
2. Check the continuity between ECO mode switch harness connector and ground.

   ECO mode switch		--	Continuity
   Connector	Terminal
   M152	8	Ground	Yes

Is the inspection result normal?

YES

GO TO 3.

NO

Repair or replace damaged parts.

1. Disconnect BCM harness connector.
2. Check continuity between BCM harness connector terminal and ECO mode switch harness connector terminal.

   BCM		ECO mode switch		Continuity
   Connector	Terminal	Connector	Terminal
   M83	80	M152	6	Yes

3. Also check harness for short to power and short to ground.

Is the inspection result normal?

YES

GO TO 4.

NO

Repair or replace damaged parts.

1. Connect all of disconnected connectors.
2. Check input/output signal of BCM. Refer to Reference Value .

Is the inspection result normal?

YES

Check intermittent incident. Refer to Intermittent Incident .

NO

Repair or replace malfunctioning components.

Check ECO mode switch. Refer to Component Inspection .

Is the inspection result normal?

YES

Check intermittent incident. Refer to Intermittent Incident .

NO

Replace ECO mode switch. Refer to Removal and Installation .