I just bought a 1987 Toyota minivan, and I'm just learning to work on cars. On the way home from the city, where I bought the van, I realized the overdrive feature wasn't engaging. Finally, it did engage, and it worked fine. Overdrive has not engaged since. I'm thinking there must be a switch of some kind, but I'm unable to find a reference to this in the repair manual. Has any one else experienced this or know what is going on?
I have the same problem. The OD doesn't go on and the van stays in third gear.
I heard it was some kind of switch that turns the OD on and off. But could it be the OD is worn out? anyone have any ideas?
I have a 1991 Toyota Forerunner with a similar issue. Mine is temperature related. Toyota has a overdrive switch that prevents overdrive from enganging unless the engine is at operating temperature. The instant it drops below the middle of the guage my overdrive kicks off. Sorry, I don't have a solution just a direction to look.
OK, easy fix. A sensor has gone out. It's located right next to the water temperature sensor on your head, just to left of the "Coolant Christmas tree".
You can replace it, spendy....like $90, or simply disconnect it and your transmission will return to normal. Doesn't hurt anything. Mine went out at 189,000 miles. My van now has 307,000, no probs. Been disconnected for like 5 years .
-ol'68
I also have a 1987 Toyota van and it will not go into over drive.
Can anyone help out with this? I can not find a diagram of what is what under the hood. What sensor is what. There are several going to the so called tree but I don't know what is what. I did find a broken vacuum line near the tree and the lines are from the fuel injection or throttle area but would really like to get this up and running again. Please send H E L P !
Thank you.
Quote:
Originally Posted by LionShakes
I just bought a 1987 Toyota minivan, and I'm just learning to work on cars. On the way home from the city, where I bought the van, I realized the overdrive feature wasn't engaging. Finally, it did engage, and it worked fine. Overdrive has not engaged since. I'm thinking there must be a switch of some kind, but I'm unable to find a reference to this in the repair manual. Has any one else experienced this or know what is going on?
I'm still not getting my overdrive to engage on my 87 Toyota Van. I took off all but one of the wired plugs from the christmas tree of the cooling system and it did not engage. The one plug that I could not get off broke but the connection were still good.
Can anyone tell me where to get a diagram of all the wires in the engine compartment? Or, What else it may be that the overdrive will not engage? the relay under the shift lever is clicking when I push the OD button but no overdrive. Need help bad. Thank you for sending any knowledge my way.
I got the OD working and it is so nice to have it on the highway. It was a solenoid on the trans. I had a local transmission shop repair it with a new one for $120.00 Now I am back on the road again happy as can be : )
Please help me figure out how to get my o/d working
Hey gang,
My O/D recently stopped working. The transmission seems fine otherwise and I'd like to try disconnecting the sensor on the christmas tree that was mentioned earlier in the thread. Can anyone post a photo of which one it is? Anything else I should try?
my dad had an 84 van and ours had an OD on/off switch... we replaced it and it worked fine. the switch was on the console I think either behind the PRNDL case or on the side, can't remember... it was like 15yrs ago.
I figured out what ol_68 was saying about disconnecting the sensor and found a photo and thread about it on Toyota Van People too. Here's the info for people that have the same problem in the future: http://www.toyotavanpeople.com/forum...erdrive+sensor
It's the grey plastic connector that goes onto the brass sensor right below the other brass sensor.
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Specific discussion of the Toyota Van. 1984 to 1989.
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I took off all but one of the wired plugs from the christmas tree of the cooling system and it did not engage. The one plug that I could not get off broke but the connection were still good. 
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