4 Runner 2WD L4-2693cc 2.7L DOHC MFI (1997)
Differential Locking System / Troubleshooting
NOTE:
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Check that the four wheel drive mode is set.
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When switching differential free <-> lock, the indicator lamp will blink if the gears of the differential lock sleeve are not meshed. If this occurs,
when the tires are rotated to apply differential power to the differential, the differential locks and the indicator lamp light up.