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From: williammaw on 3 Jun 2010 13:54
On Jun 2, 9:06 pm, "Ray O" <rokig...(a)NOSPAMtristarassociates.com>
wrote:
> <william...(a)aol.com> wrote in message
>
> *******
> A 1991 Previa is OBD I so you check codes by shorting terminals TE1 and E1
> in the diagnostic check connector under the driver's seat.  Unbend a paper
> clip and insert the ends of the clip in the terminals, then turn the
> ignition switch to the on position and count the check engine light flashes.
> If it flashes steadily, then no codes are stored.  If it flashes, pauses,
> flashes again, then pauses for a longer period and repeats the pattern,
> count the flashes.  The flashes correspond to the codes.  For example, 3
> quick flashes, then 2 quick flashes, then repeat means the code is 32.
>
Well, I just got back from checking out the ECM codes. The engine
check light was blinking continuously (over 30 times). I made sure
several times that the jumper was connected to terminals TE1 and E1,
which is also clearly labeled inside the cap. I also made sure that I
wasn't mistaking the blinks from a long series of flashes, which is 7
max it seems.

After I pulled the jumper out of the terminals and tried to start it
the engine hopped once and looked like it was almost going to spring
back to life, but sadly it was only that one hop.

So is it the ECM shot?

From: Ray O on 4 Jun 2010 00:01

<williammaw(a)aol.com> wrote in message
news:487f3d21-b715-4784-9e57-c922cff7d7ed(a)c13g2000vbr.googlegroups.com...
On Jun 2, 9:06 pm, "Ray O" <rokig...(a)NOSPAMtristarassociates.com>
wrote:
> <william...(a)aol.com> wrote in message
>
> *******
> A 1991 Previa is OBD I so you check codes by shorting terminals TE1 and E1
> in the diagnostic check connector under the driver's seat. Unbend a paper
> clip and insert the ends of the clip in the terminals, then turn the
> ignition switch to the on position and count the check engine light
> flashes.
> If it flashes steadily, then no codes are stored. If it flashes, pauses,
> flashes again, then pauses for a longer period and repeats the pattern,
> count the flashes. The flashes correspond to the codes. For example, 3
> quick flashes, then 2 quick flashes, then repeat means the code is 32.
>
Well, I just got back from checking out the ECM codes. The engine
check light was blinking continuously (over 30 times). I made sure
several times that the jumper was connected to terminals TE1 and E1,
which is also clearly labeled inside the cap. I also made sure that I
wasn't mistaking the blinks from a long series of flashes, which is 7
max it seems.

After I pulled the jumper out of the terminals and tried to start it
the engine hopped once and looked like it was almost going to spring
back to life, but sadly it was only that one hop.

So is it the ECM shot?

*******
No, a continuously blinkgin check engine light means that no codes are
stored and the ECM had not detected any faults. Unfortunately, the ECM
doesn't check nearly as many sensors and systems and an OBD II system does.

Try depressing the throttle pedal while cranking. If it starts and idles
roughly, the Idle Air Control (IAC) valve is probably stuck or gummed up.
Try cleaning with carb cleaner.

If you can find a rubber hose that leads to the fuel rail for the injectors,
put your hand on the hose while cranking. You should feel the fuel flowing
through the hose.

--

Ray O
(correct punctuation to reply)


From: williammaw on 4 Jun 2010 18:06
On Jun 3, 10:01 pm, "Ray O" <rokig...(a)NOSPAMtristarassociates.com>
wrote:
> <william...(a)aol.com> wrote in message
>
> *******
> No, a continuously blinkgin check engine light means that no codes are
> stored and the ECM had not detected any faults.  Unfortunately, the ECM
> doesn't check nearly as many sensors and systems and an OBD II system does.
>
> Try depressing the throttle pedal while cranking.  If it starts and idles
> roughly, the Idle Air Control (IAC) valve is probably stuck or gummed up.
> Try cleaning with carb cleaner.
>
> If you can find a rubber hose that leads to the fuel rail for the injectors,
> put your hand on the hose while cranking.  You should feel the fuel flowing
> through the hose.
>
I went again to check it out and this time I found that the check
engine light is not coming on at all. I tried starting with the pedal
depressed but still won't start.
From: Ray O on 12 Jun 2010 01:15

<williammaw(a)aol.com> wrote in message
news:b73708e2-47b4-4515-ab62-653c7c7a335d(a)c13g2000vbr.googlegroups.com...
On Jun 3, 10:01 pm, "Ray O" <rokig...(a)NOSPAMtristarassociates.com>
wrote:
> <william...(a)aol.com> wrote in message
>
> *******
> No, a continuously blinkgin check engine light means that no codes are
> stored and the ECM had not detected any faults. Unfortunately, the ECM
> doesn't check nearly as many sensors and systems and an OBD II system
> does.
>
> Try depressing the throttle pedal while cranking. If it starts and idles
> roughly, the Idle Air Control (IAC) valve is probably stuck or gummed up.
> Try cleaning with carb cleaner.
>
> If you can find a rubber hose that leads to the fuel rail for the
> injectors,
> put your hand on the hose while cranking. You should feel the fuel flowing
> through the hose.
>
I went again to check it out and this time I found that the check
engine light is not coming on at all. I tried starting with the pedal
depressed but still won't start.

**********
No check engine light means that it is unlikely that any codes are stored in
the ECM.

Now it is time for the basics - air, fuel, and a source of ignition at the
proper time. I'd start with ignition by checking for spark.
--

Ray O
(correct punctuation to reply)


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