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My 4WD is not engaging on my 2000 Toyota 4Runner 3.4L.?

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Old 20 Nov 2011, 06:09 pm   #1 (permalink)
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Default My 4WD is not engaging on my 2000 Toyota 4Runner 3.4L.?
When I go to shift into 4wd with the transfercase lever I can hear an electrical "click" noise just like it did when it use to work. But the 4wd light on the dash does not work anymore. Any help is much appreciated. Gotta get it fixed before the snow falls! I'm working at a ski resort!















Forgot to mention it is Automatic and there is no check engine light on or has it ever come on.
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Old 20 Nov 2011, 06:55 pm   #2 (permalink)
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trouble shooting table for that,















http://www.ncttora.com/fsm/1996/SIL/...m/trou/pst.pdf































specifically,















http://www.ncttora.com/fsm/1996/SIL/...24ssy/insp.pdf































you might start with going to a local parts store and ask if they will pull the codes for you. most will do it for free. write 'em down.































or you can do it yourself if you have the scanner,















http://www.ncttora.com/fsm/1996/SIL/...zfe/preche.pdf































it's still unclear to me if you have an auto trans or manual. so you may need to go here with your codes,















http://www.ncttora.com/fsm/1996/SIL/...di/at/dtcc.pdf















-----















EDIT,















FYI, per manual, not all codes stored prompt a light. so check codes regardless.
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Old 20 Nov 2011, 07:39 pm   #3 (permalink)
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The front diff has an ADD disconnect on it. It is normally disconnected so the front axle shafts are not turning. When you shift the transfer case to 4wd it throws a switch which triggers a solenoid and a vacuum valve to send vacuum to the ADD to connect it. The 4wd light is controlled by a switch on the ADD when it connects. You have a vacuum canister and some hoses. Check the hoses and make sure you have vacuum. May be hose rotted off. If vac ok - check switch, solenoid and valve to see if vac is getting switched. Trace the whole ADD control system. the ADD is a habernacle on the side of the diff housing.
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Old 20 Nov 2011, 08:24 pm   #4 (permalink)
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Check solenoid functioning
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