Gx460_U.s.a. (Om60G24U - Lexus GX460 Manual

When the four-wheel drive control switch can be operated
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The "ENGINE START STOP" switch is in IGNITION ON mode.
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The shift lever is in the N position.
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The vehicle is stopped completely.
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The low speed four-wheel drive indicator light
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The indicator light blinks while switching between H4 and L4.
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If the low speed four-wheel drive indicator light continues to blink when you
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operate the four-wheel drive control switch to the H4 or L4 position, stop the
vehicle completely, shift the shift lever securely into N and then operate the
switch again.
If the shift lever is moved before the low speed four-wheel drive indicator turns
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on/off, the transfer mode may not be shifted completely. The transfer mode dis-
engages both the front and rear drive shafts from the powertrain and allows the
vehicle to move regardless of the shift position. (At this time, the indicator blinks
and the buzzer sounds.) 
Therefore, the vehicle is free to roll even if the shift lever is in P. You or someone
else could be seriously injured. You must complete the shifting of the transfer
mode and confirm that the indicator light has turned off (H4) or turned on (L4).
If the engine coolant temperature is too low, the four-wheel drive control system
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may not be able to shift. When the engine is warmer operate the switch again.
If the indicator continue to blink even if doing so, have the vehicle inspected by your
Lexus dealer as soon as possible. There may be a trouble in the four-wheel drive
system.

GX460_U.S.A. (OM60G24U)

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