Code Reader DIAGNOSTIC Check

[MichiganFan82]

Apparently places such as Autozone do not have code readers that read 1995 imports or earlier models. I have a 1994 4runner SR5 and am probably going to go buy a code reader instead of paying the $80 a dealer charges for a diagnostic check. Does anyone have any recommendations for which code reader that will work for a 1994 4runner?

Thanks!

 

[n8buddy]

try this before you spend any money.

 

[jeph_tsi]

definetly with n8buddy here, the pre obd computers are very simple, I've owned a bunch of toyotas in the past and the paperclip diagnostic has always been plenty adequate. when you're done just remove the eci fuse for a minute and the light is resetted.

 

[MichiganFan82]

Thanks guys! Appreciate the tip and I will try first thing in the morning.

 

[ricoman]

OBD connector location

I just picked up a '95 4runner last week and can't seem to find the OBD connector. Can someone tell me the location. Thanks

 

[n8buddy]

its not an OBD connector. Its a diagnostic port and its beside the main fuse box under the hood.

 

[Sidney]

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:

http://autorepair.about.com/library/ts/obd-i/bl-dtcs-36.htm
http://autorepair.about.com/library/ts/obd-i/bl-dtcs-53.htm
http://autorepair.about.com/library/ts/obd-i/bl-dtcs-71.htm
http://autorepair.about.com/library/ts/obd-i/bl-dtcs-90.htm
http://www.autozone.com/az/cds/en_us/0900823d/80/16/11/12/0900823d80161112/repairInfoPages.htm
http://www.off-road.com/toyota/tech/codes/index.html
http://www.4crawler.com/4x4/CheapTricks/index.shtml#TimingCheckConnector
http://www.4crawler.com/4x4/CheapTricks/Images/85diagnosticcodes.gif
http://lcengineering.com/TechNotes/TechNote12.htm
http://lcengineering.com/TechNotes/TechNote13.htm
http://www.geocities.com/MotorCity/Pit/9975/dataBySubject/Engine.html
http://www.mad-mechanic.com/toyota/toyotaobd.shtml#obtaincode
http://www.freewebs.com/th3duke/22RE-ECU.mht
http://www.troublecodes.net/Toyota
http://www.autoshop101.com/forms/h27.pdf
http://www.cygnusx1.net/Supra/TechTips/engine_error_codes.aspx
http://www.showmesome.info/hilux/info/manuals/1KZ-TE/Page0096.htm
http://www.efisakh.narod.ru/at_toyota.htm (auto tranny codes)
http://www.usatransdoctor.com/foreigntoyota.htm
http://www.obd-codes.com/forums/viewforum.php?f=3

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.

Free 1990-1995 Toyota 4-Runner Factory Service Manual:

http://forums.bauchan.org/portal/viewdownloads.php?rid=166
http://thepiratebay.org/tor/3536729/1990_to_1995_OEM_Toyota_4Runner_Service_and_Wiring_Manuals
http://torrentportal.com/details/73...ta+4Runner+Service+and+Wiring+Manuals.torrent

Free 1995 Toyota 4-Runner Factory Service Manual:

http://rapidshare.com/files/34006966/Toyota.4Runner.1990.1995.SIL.rar
http://www.the-roo.com/4runner (3VZE engine, 3 liter, V6)

Sidney