checking cel

[obradleyo]

so I have a question about the cel. Last night I was reading threw jerrys page on checking the CEL. My 1st question when your turn you key on does it light up for a second or two and then go out or does it light up and stay lit till the car starts? Also when checking the code I was thinking i was getting a code 22 so I replace the TPS. now still code 22 I think. When I have the jumper in and turn the car it goes halfblink, whole bilnk , pause blink, blink. So is that half blink counted or not is my question......

[jtgh]

95 16v.,
half blink, there is no such thing. (sick ecu, pops to mind !)
New TPS, did you calibrate it first?

key on, light stays on.
start, goes out.

never do that. replace any part UNTIL:


1: pull dome fuse.
2: put back and drive until CEL comes back on,
3: then pull codes.
4: if still code 22,? (its real an not some ancient stored anomaly)


if still set. this code means.

ECU sees output of TPS as a gross low state.
EG: stuck at 0v while driving.

causes,
1: broken wire to TPS wiper.
2: broken wire to TPS 5v terminal
3: no 5vdc refr. voltage coming from ECU (bad ecu or some sensor or wire is grounding it out)

4: bad ecu. inputs (rare very rare)


so ,
1: key on (not running)
2: voltmeter to 5v ref pin, is is +5vdc ?
3: if #2 is true, then see pin, 3.
4: with meter on pin 3 and ground , rotate the throttle.
5: the meter will start a 0-1v and move to 5v, in a smooth manor.

repeat #5 , a few times to be sure there are no glitches. (there wont yours is new)

THe TPS is a really simple dumb part.
it is just a carbon variable resistor (not really electronics but electric)
it is grounded on one side.
5vdc on the other
and sends a voltage directly proportional to throttle position, thus its name.


http://www.kick-fix.com/sensors/95-TPS-adj1w.jpg

see pin B6 on ecu , that is the 5v ref pin.
more facts.

16v-ecu-pins

http://www.kick-fix.com/specs/95ecu1w.jpg

http://www.kick-fix.com/specs/95ecu2w.jpg

the above are links from my bad ecu page.



the half blink, that is no good.

id examine the large capacitors in the ECU. on any pre 96 kick.
if they say rubycon , on the side or are leaking they need swapping fast.

[jtgh]

code 22, can be fooled.

but it dont lie. (unless you were pulling connectors with the key on)
and of course doing so you can create a DTC on ANY car.

the output of the TPS is bad, but what is causing it, we must find it and we can.

it ckeck B6 line for 5vdc pronto.

[obradleyo]

so On my lunch I checked the Codes again Its code 12 not 22.... After reading your page I discoverd that it will keep throwing out codes it you turn it off.... so I kept the key on for a while and let it throw codes for a min or two I got 12 every time..... so now I have a Good used TPS for a 95 16v anyone interested???? Jerry you know what years this unit is good for?

[obradleyo]

I do have another question... So I know that there are 3 diffrent time to check the CEl 1 engin on 2 cranking and 3 running. will it only light up while its running or can it light up at other time's like when cranking.

[jtgh]

sure 92-98, I ran a used 92 on mine for months before i could get one new)

when the jumper is places.
CEL lamp fashes for ever.
while key on, while running and just after cranking.
shows old data and new data , unless you clear it first by pulling the dome fuse.

while cranking it will store 41, and 42 and then tell you you have a bad, cmp or bad spark. (dumb it is ,and smart compared to an 85)

good questions. all


while cranking the CEL turns out as soon as crank speed exceeds 200 rpm.
if you release the key and there are codes (live or old) it starts flashing them.
if it dont start and the CMP died, key still on) it flashes out 42 or 41, on of the two.
if the spark read back fails it flashes out the other code 41/41
codes are on my page.

to the best if my knowledge that is how it works.

the full spec, on that is in your public lib . log in , see chiltions, on e-sources, and read the FSM. free to you Sacratomatoeians. heheheheh.
I grew up near there. 50's my aunt lives is Colusa. has rice fields and corn.
my fav place is there and fishing on the Sac river, sandy , under the willow trees.