Montero V6-3.8L SOHC (2005)
The front ECU lights up the headlight (LO) when the signal from the column switch to the headlight switch is in the "ON" state and the built-in head
light relay (LO) is in the "ON" state. If the dimmer switch is turned on while the headlight relay (LO) is on, the front-ECU turns on the headlight relay
(HI), causing the high-beam headlights to illuminate.
What's more, ETACS-ECU lights up the high beam indicator light when the acknowledgment signal from the front ECU is in the "HI-BEAM ACK" state
or the head light switch signal from the column switch is in the "PASS" state.
NOTE: This item only considers the headlight lightup function and doesn't take into consideration the other functions. In actual driving, the headlights
may be turned off due to the headlight automatic shut-down function. For the details of the headlight automatic shut-down function, refer to headlight.
Headlight automatic-shutdown function
Even if the lighting switch (taillight switch or headlight switch) is ON, the head light (including the taillights) will automatically go off in the following
conditions to prevent the battery from discharging as a result of forgetting to turn off lights.
When the ignition key is turned from "ON" to "LOCK" (OFF) or "ACC" position with the lighting switch turned ON, and this state continues for three
minutes, the light will automatically be turned off. If the driver's door is opened during these three minutes, the light will go off one second later.
NOTE: This function can be disabled by the adjustment procedures of SWS function.
Dimmer automatic reset function
