Question about 1991 Toyota Pickup

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What does a code 12 meen on a 91 toyota pickup 3vze

I have replaced the ignitior and coil and it still reads 12 when i check the codes it will die when im driving starts back up in a minute or so

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Posted on Jan 02, 2017

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ZJLimited
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SOURCE: How do you pull the codes for a 91 Toyota Pickup.

If it's an OBD1 car (typically before 1996) you can manually access the codes and find out what they are by watching the "check engine" light blink. If it's an OBD2 car, then no...you have to have a code reader.

The good news is that many auto parts stores will read the codes for you for free (autozone). Just be careful listening to their diagnosis.

Good luck.

Posted on May 07, 2010

Testimonial: "Great info I will try it tonight"

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SOURCE: my 87 toyota 4-runner runs

when this happens,do you have anyway of cooling the E.C.M. unit to see if this component is heat sensitive?,or possibly the reluctor coil under the distributor tower has a thermal issue,the ignition coil that feeds the tower may also have a thermal issue,because you say after it sits a while its fine again for a time

Posted on Nov 03, 2010

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1 Answer

1994 Geo Metro will not start


all spark plugs dead. and at the main coil?
in this case after fuse (test them , ones that look good can be bad)
these steps work or all EFI cars made.
first is the rotor spinning cranking, if not the cam belt snapped!
a 1 second check, do you try to run 60k mile belts 200k ?


  1. CEL lamp on? key on? no crank? y/n,, if no the ECU is dead. or lamp burned out, we fix this FIRST. for next tests.
  2. I insert the diagnostic jumper clip (paper clip)
  3. the CEL now flashes codes, write them all down.
  4. I then crank for 5 seconds. and release the key.
  5. The ECU then reports live codes. beyond above stored codes.
  6. The ECU is very good at finding bad crank or cam sensors dead or even missing pulses, 1 in 10 lost. trust it, on all cars ......
  7. if no sensor code errors or spark bad errors then do the next things.
  8. The ecu also reads back the Tacho signal and will report dead tacho, sig, the ECU creates this and is the COIL drive signal to the ignition coil via the IGNITOR device.
  9. If the ignitor dies, or the coil primary opens, (dead Ign.coil) then the ECU see this and gives you Spark fail codes, cranking only!
  10. if you get far with a dead ignition coil, the ignitor is bad or the coil assuming coil even has power 12vcd key on.
this is all in the FSM, if you read it.
as is the Ignitior tests, and the coil tests.
The FSM is an amazing thing if your read it.
buy one.

ECU = engine brain, or EFI brain
EFI = eletronic fuel injection
CEL is the check engine light also called SES or MIL.
your ECU is OBD1 and no scan tool works .
only the winky blinky light.

Mar 04, 2014 | 1994 Geo Metro

1 Answer

Code 12 on a 1994 toyota pickup wiyh a 3.0


the light will flash a 12 code 3 times then tell you the stored codes then a 12 code when the stored codes are read, so if you only see a 12 and the forth time is a 12 then there is nothing wrong with your truck. the 12 code is just telling you its in diagnostic mode.

Apr 01, 2013 | 1994 Toyota Pickup

1 Answer

92 toyota 3.0 3vze thermostat needs replaced


Drain the antifreeze and follow the lower radiator hose to where to bolts onto the water pump. There should be three 12 millimeter bolts. Remove those and replace the thermostat. The antifreeze will drain out of the block. Make sure you have the new thermostat gasket in place around the thermostat. Use a small bit of silicone for sealing. Installation is reverse order of removal.

Jan 13, 2013 | 1992 Toyota Pickup

1 Answer

91 toyota truck igniter, coil, distributer, ecu?


Hello
The engine in this vehicles drive train are fully electronically controlled by a computer called the PCM (Power Train Control Module). Whenever a problem like this occurs the computer stores a record of the problem (there are of course some exceptions to this, like the fuel pump, engine coolant temperature sensor and MAF sensor for instance) in the form of a fault code in its memory, to read these fault codes you must have the systems memory scanned with a special tool. Once the fault code(s) are read you then must perform the appropriate diagnostic testing to find and resolve the problem(s) DO NOT REPLACE ANY PARTS UNTIL A TRAINED TECHNICAIN HAS DIAGNOSED THE PROBLEM TO AVOID SPENDING YOUR HARD EARNED MONEY ON PARTS THAT MAY NOT CORRECT THE PROBLEM

Aug 09, 2012 | 1991 Toyota Pickup

1 Answer

1986 toyota cressida ran fine this morning untill i whent to the store made a sharp right hand turn and the car died it started right back up but runs extreamly ruff and most times wont stay running....


If you know what the codes are referring to , you then go to the parts and check them out. Obviously you have an ignition coil issue - replace the coil for one thing.

Sep 07, 2017 | 1986 Toyota Cressida

2 Answers

I have a 1992 Toyota 4x4 pickup 3.0L v6 3vze. I've had it for a short time the check engine light keeps coming on, I've had it looked at and tested a few times it seems to come on when I'm driving at high...


I help people out with toyota problems and i am good with toyotas, but i will tell you i have the same problem with my truck and i have a 91 V6, there is nothing wrong with your truck, what i ahve come to find out thats its not really a problem but more of a short some where, i cant find mine, but if your check engine like comes on like you say and stays on and will turn off when you turn the truck off and come on again when you do the same thing you were doing then we both have the same problem, there is no code for it, but really man, dont sweat the same things.

Mar 10, 2009 | 1992 Toyota Pickup

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