Originally Posted by mxben
Hi! I checked at the obd codes for a second time this week and now the truck's computer said #22 and #51. Does anybody ever had these code before and what should I look at?
ECU code 22 is water temperature sensor (or areas around it) for ECU and code 51 is TPS (throttle position sensor) sensor or areas around it. I suspect your water temp sensor is faulty and your throttle body is fouled up with excessive carbon build up,read below for full details and follow my repair help.If you are in Dartmouth,Nova Scotia I can help you.
About half of the ECU codes stored on the first & second generation EFI Toyotas don't show a constant blinking check engine light therefore you must pull the ECU codes to see if a fault is registered.
To pull the ECU codes:
All 1980-1995 and including 1995 EFI equipped vehicle allow you to find engine and related faults by pulling the ECU (computer) codes without the need for a handheld OBDII diagnosis scanner, the sites listed below have the fault codes needed to pull the codes and the instructions on how to do it:
(auto tranny codes)
Pulling the ECU (EFI computer) codes is the first thing I do to diagnosis a problem thereafter I reset the ECU to see if the same problems show up and if so I then take voltage measurements at each ECU wire both with the engine running and not and compare with the factory service manual, I also close the ignition switch after a cold engine and also after a warm engine and compare the resistance values with the factory service manual. This technique will completely isolate your problem without having to do trial and error and it is the technique I use when repairing tv's, vcr's, home/car audio.
Lots of city miles combined with low octane fuel & no Techtron fuel additive (cleaner) creates excessive throttle body carbon build up (gunk) so throttle body must be cleaned.
To clean the throttle body remove the air intake hose and examine the intake and throttle body for excessive carbon build up if found then buy a can of throttle body cleaner labeled "safe on oxygen sensors, TPS's and catalytic converters" do not use carb cleaner make sure your engine is fully warmed up prior to using as when the throttle body is hot it dissolves the carbon easily and quickly.
The labels usually specify to park the vehicle at ground level (0 degrees, no inclination) and have the engine running but I disagree I instead park the vehicle on a hill facing down and shut the engine off and hold a rag below the lip of the throttle body and poor the stuff and use a tooth brush. You can also use "Sea Foam" the best engine cleaner:
available in Canada through UAP/NAPA Auto Parts Stores.
Any Public Library in your area would have the Factory service manual, Haynes,Chiltons,Mitchells,Clymers, Bentley and Toyota repair books.
Free AutoZone service manuals at:
Tons of free factory service manuals for 4-Runners,etc:
Free 1985 Toyota 4-Runner & pickup Factory Service Manual:
you may also need to install this:
heres the instructions
1985 FSM - READ FIRST
This FSM works for the stock solid front axle trucks
If you have a pre-84 vehicle with an external voltage regulator, the ignition/charging section will not work for you. If you have an ’85 vehicle, make note as to whether you are carbed or EFI, as the ignition systems are not the same.
Accurate links for pre-84 charging/ignition systems would be appreciated.
Regarding the FSM, WARNING: Do not try and open this file over the internet no matter HOW fast your connection is; Adobe WILL lock up. This document is 1025 pages long!
Tech note from lscotte: Firefox users may not need this download tool. Right click>save link as...
Download AmazingDown 1.62 first.
Then in that program press the "New" button on the tool bar and copy and paste the URL below into the corresponding dialogue box and click download. This will greatly speed up the process of downloading such a big file from a server that isn't quite the fastest out there. Once the file is downloaded you can open it from your hard drive. (folder entitled ‘downloaded’)
Free 1993 Toyota Pickup Service Manual:
Free 1989 - 1995 Pickup Mitchell Service Manual:
You can download the winrar archiver from: http://www.rarlab.com/download.htm
And The ISO file can be downloaded from:
<--- Part 1
<--- Part deux
The two rar files are 90 Megabytes in size, but once unrared it is a 300 Megabyte ISO image.BTW: File will be removed automatically if there is no download for 30 days.
FSM (factory service manual) & owners manuals can be acquired in several ways:
Toyota Material Distribution Center
750 West Victoria St
Rancho Dominguez/Compton, CA 90220-5538
Ph:1-800-622-2033 (outside CA)(M-F: 7-5 PST)
Ph:1-800-443-7656 (inside CA)
Ph:1-310-818-4630 (in or outside CA)
Speak to Beverly or Deloris
1)buy a used one off e-bay
2)some Toyota dealerships may give you one or sell it for $10-20 (used) as most Toyota dealerships don't repair many old Toyotas and no longer need the service manual
3)some public libraries sell their old books as they are not in demand any longer
4)some free buy & sell classified papers, websites and bulletin boards may have some used ones for sale
5)some junk yards may have one laying around
6)some Toyota specialty garages may have one laying around and no longer use it as the vehicle may be too old and those mechanics probably have so much experience that they could publish their own factory service manual with corrections and "real world repair tips"
7)if someone has the FSM maybe they could scan all of the pages and post it on a site for all of us to download or view.
The Toyota 3 liter V6 engine model: 3VZE engine is used in about 60% of the 1988-95 Toyota 4-Runners and pickups sold in Canada & USA.
Repairs TV's,VCR's,home/car audio out of my apartment
for I am