2000 4Runner security light blinking

After being returned from the dealer for replacement of the ECM, the
dashboard security light blinks while the vehicle is being driven.
Prior to the repair, the light would blink when the vehicle was parked
but would be off when the vehicle is being driven. The only thing the
dealer thought to do was replace the battery in the remote. Any
thoughts?

<robinsongf@comcast.net> wrote in message
news:1170440487.096111.166210@v45g2000cwv.googlegroups.com...[color=blue]
> After being returned from the dealer for replacement of the ECM, the
> dashboard security light blinks while the vehicle is being driven.
> Prior to the repair, the light would blink when the vehicle was parked
> but would be off when the vehicle is being driven. The only thing the
> dealer thought to do was replace the battery in the remote. Any
> thoughts?
>[/color]

Which ECM did the dealer replace?
--

Ray O
(correct punctuation to reply)

hmm, engine immobilizer is related to the ECM The ECM shuts down the
engine and blinks the lights. The security lights blink when the keys
(with transponder chip) is not detected by the car.

On Feb 2, 10:21 am, robinso...@comcast.net wrote:[color=blue]
> After being returned from the dealer for replacement of the ECM, the
> dashboard security light blinks while the vehicle is being driven.
> Prior to the repair, the light would blink when the vehicle was parked
> but would be off when the vehicle is being driven. The only thing the
> dealer thought to do was replace the battery in the remote. Any
> thoughts?[/color]

On Feb 2, 2:33 pm, "Ray O" <rokigawaATtristarassociatesDOTcom> wrote:[color=blue]
> <robinso...@comcast.net> wrote in message
>
> news:1170440487.096111.166210@v45g2000cwv.googlegroups.com...
>[color=green]
> > After being returned from the dealer for replacement of the ECM, the
> > dashboard security light blinks while the vehicle is being driven.
> > Prior to the repair, the light would blink when the vehicle was parked
> > but would be off when the vehicle is being driven. The only thing the
> > dealer thought to do was replace the battery in the remote. Any
> > thoughts?[/color]
>
> Which ECM did the dealer replace?
> --
>
> Ray O
> (correct punctuation to reply)[/color]

The one involved with the O2 sensors.

<robinsongf@comcast.net> wrote in message
news:1170507933.945901.53510@s48g2000cws.googlegroups.com...[color=blue]
> On Feb 2, 2:33 pm, "Ray O" <rokigawaATtristarassociatesDOTcom> wrote:[color=green]
>> <robinso...@comcast.net> wrote in message
>>
>> news:1170440487.096111.166210@v45g2000cwv.googlegroups.com...
>>[color=darkred]
>> > After being returned from the dealer for replacement of the ECM, the
>> > dashboard security light blinks while the vehicle is being driven.
>> > Prior to the repair, the light would blink when the vehicle was parked
>> > but would be off when the vehicle is being driven. The only thing the
>> > dealer thought to do was replace the battery in the remote. Any
>> > thoughts?[/color]
>>
>> Which ECM did the dealer replace?
>> --
>>
>> Ray O
>> (correct punctuation to reply)[/color]
>
> The one involved with the O2 sensors.
>[/color]

Without looking at a wiring diagram, I can't imagine why the security system
light would blink when the vehicle is being driven after ECM replacement.
Just curious, what was the problem that led the dealer to replace the ECM?

I recommend that you take the vehicle back to the dealership that replaced
the ECM for diagnosis and repair.
--

Ray O
(correct punctuation to reply)

<robinsongf@comcast.net> wrote in message
news:1170618476.000666.318600@h3g2000cwc.googlegroups.com...[color=blue]
> On Feb 3, 2:01 pm, "Ray O" <rokigawaATtristarassociatesDOTcom> wrote:[color=green]
>> <robinso...@comcast.net> wrote in message
>>
>> news:1170507933.945901.53510@s48g2000cws.googlegroups.com...
>>
>>
>>
>>
>>[color=darkred]
>> > On Feb 2, 2:33 pm, "Ray O" <rokigawaATtristarassociatesDOTcom> wrote:
>> >> <robinso...@comcast.net> wrote in message[/color]
>>[color=darkred]
>> >>news:1170440487.096111.166210@v45g2000cwv.googlegroups.com...[/color]
>>[color=darkred]
>> >> > After being returned from the dealer for replacement of the ECM, the
>> >> > dashboard security light blinks while the vehicle is being driven.
>> >> > Prior to the repair, the light would blink when the vehicle was
>> >> > parked
>> >> > but would be off when the vehicle is being driven. The only thing
>> >> > the
>> >> > dealer thought to do was replace the battery in the remote. Any
>> >> > thoughts?[/color]
>>[color=darkred]
>> >> Which ECM did the dealer replace?
>> >> --[/color]
>>[color=darkred]
>> >> Ray O
>> >> (correct punctuation to reply)[/color]
>>[color=darkred]
>> > The one involved with the O2 sensors.[/color]
>>
>> Without looking at a wiring diagram, I can't imagine why the security
>> system
>> light would blink when the vehicle is being driven after ECM replacement.
>> Just curious, what was the problem that led the dealer to replace the
>> ECM?
>>
>> I recommend that you take the vehicle back to the dealership that
>> replaced
>> the ECM for diagnosis and repair.
>> --
>>
>> Ray O
>> (correct punctuation to reply)- Hide quoted text -
>>
>> - Show quoted text -[/color]
>
> I took the vehicle in to replace an 02 sensor - two replacement
> sensors failed
> to clear the check engine light, so the ECM was replaced at the
> suggestion of
> Toyota tech support. I went back to the dealer and asked about the
> flashing security
> light, and the only thing they could think of was to replace the
> battery in the remote :-(
>
> Since I have the engine immobilizer, could it be that the ignition key
> was flashed to match
> a code in the new ECM, and the module controlling the security light
> thinks the key is bogus?
>[/color]

I asked why the ECM was replaced because ECM failure is so rare.

It is possible that the ignition key was flashed to match a code in the new
ECM, but I would think that if the module controlling the security light
thought the key was bogus, it wouldn't allow the vehicle to start. I think
it is time for the dealership to make another call to tech support.
--

Ray O
(correct punctuation to reply)

The ECM is in auto registration mode. This occurs after replacement
of the ECM and allows the technician to quickly register the keys.

Ask the dealer to look up closing of auto registration and have all
your keys handy. Check to see if any spares have been programmed yet.
If not take them to the dealer when you return.

Let me know if I can further assist with this.

MDTDan

"Ray O" wrote:[color=blue]
> <robinsongf@comcast.net> wrote in message
> news:1170618476.000666.318600@h3g2000cwc.googlegroups.com...[color=green]
> > On Feb 3, 2:01 pm, "Ray O"[/color]
> <rokigawaATtristarassociatesDOTcom> wrote:[color=green][color=darkred]
> >> <robinso...@comcast.net> wrote in message
> >>
> >> news:1170507933.945901.53510@s48g2000cws.googlegroups.com...
> >>
> >>
> >>
> >>
> >>
> >> > On Feb 2, 2:33 pm, "Ray O"[/color][/color]
> <rokigawaATtristarassociatesDOTcom> wrote:[color=green][color=darkred]
> >> >> <robinso...@comcast.net> wrote in message
> >>
> >> >>news:1170440487.096111.166210@v45g2000cwv.googlegroups.com...
> >>
> >> >> > After being returned from the dealer for replacement[/color][/color]
> of the ECM, the[color=green][color=darkred]
> >> >> > dashboard security light blinks while the vehicle is[/color][/color]
> being driven.[color=green][color=darkred]
> >> >> > Prior to the repair, the light would blink when the[/color][/color]
> vehicle was[color=green][color=darkred]
> >> >> > parked
> >> >> > but would be off when the vehicle is being driven. The[/color][/color]
> only thing[color=green][color=darkred]
> >> >> > the
> >> >> > dealer thought to do was replace the battery in the[/color][/color]
> remote. Any[color=green][color=darkred]
> >> >> > thoughts?
> >>
> >> >> Which ECM did the dealer replace?
> >> >> --
> >>
> >> >> Ray O
> >> >> (correct punctuation to reply)
> >>
> >> > The one involved with the O2 sensors.
> >>
> >> Without looking at a wiring diagram, I can't imagine why[/color][/color]
> the security[color=green][color=darkred]
> >> system
> >> light would blink when the vehicle is being driven after[/color][/color]
> ECM replacement.[color=green][color=darkred]
> >> Just curious, what was the problem that led the dealer to[/color][/color]
> replace the[color=green][color=darkred]
> >> ECM?
> >>
> >> I recommend that you take the vehicle back to the[/color][/color]
> dealership that[color=green][color=darkred]
> >> replaced
> >> the ECM for diagnosis and repair.
> >> --
> >>
> >> Ray O
> >> (correct punctuation to reply)- Hide quoted text -
> >>
> >> - Show quoted text -[/color]
> >
> > I took the vehicle in to replace an 02 sensor - two[/color]
> replacement[color=green]
> > sensors failed
> > to clear the check engine light, so the ECM was replaced at[/color]
> the[color=green]
> > suggestion of
> > Toyota tech support. I went back to the dealer and asked[/color]
> about the[color=green]
> > flashing security
> > light, and the only thing they could think of was to replace[/color]
> the[color=green]
> > battery in the remote :-(
> >
> > Since I have the engine immobilizer, could it be that the[/color]
> ignition key[color=green]
> > was flashed to match
> > a code in the new ECM, and the module controlling the[/color]
> security light[color=green]
> > thinks the key is bogus?
> >[/color]
>
> I asked why the ECM was replaced because ECM failure is so
> rare.
>
> It is possible that the ignition key was flashed to match a
> code in the new
> ECM, but I would think that if the module controlling the
> security light
> thought the key was bogus, it wouldn't allow the vehicle to
> start. I think
> it is time for the dealership to make another call to tech
> support.
> --
>
> Ray O
> (correct punctuation to reply)[/color]

--
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