Seeking solution - Denso 067d (ignition coil?)

[RAB]

While attempting to jump start my FJ80, I smoked the wires shown in the 2nd attached picture.
The part in question is Denso 067d which I believe is the ignition coil:

• the wires leading to the unit were charred during the jumping process
• the wires coming out of the unit look normal

The part has wires running to the A/C compressor and the alternator.
Prior to smoking the wires, everything on the truck was working as it should.

After getting the truck started the truck had, 2 parts that failed to operate - they are the:

• A/C compressor - it won't turn on. The fan blows but the compressor doesn't kick on when the A/C button is pushed.
• Alternator - 2 separate shops said that the alternator is bad. The truck starts normally and the battery seems to be keeping a normal charge.

It's odd that both major parts would go bad at the same time without some other issue/component being a contributing factor.


Questions:

• Could the A/C compressor and alternator malfunctions be due to smoking the wires running to the part shown (Denso 067d) in the attached photos?
• Could replacing the wires running to the ignition coil be a sufficient fix? Can that single 2 wire piece be sourced by itself?
• Should the coil be swapped for new?
• Does anyone have a reliable supplier that these specific replacement parts can be found?
• Is it likely that the internals of ignition coil was damaged? The truck has zero problems starting, idling or accelerating.

Prior to this setback, I was gearing up to make a trip from New Orleans towards the areas of Colorado, Utah, Arizona - I surely do not want this issue to present a failure while on the road.

Any help or ideas as to how to fix the problem would be appreciated.

 

[uscmas412]

What year is your 80?

Yes, that's the ignition coil. Part # 19080-66010 and still available at Toyota dealers or online for ~ $120.

The wires are grounding cables and can be replaced with any similar gauge wire. I'd start here while checking the remainder of the grounding points in the engine bay. Battery to engine, battery to body, etc.

Ground wire help

I was working on some steering components tonight and noticed the ground wire that has multiple connections from under the charcoal canister, to behind the coil, then up to the intake and engine hanger. Two of the wires have clips, which one of mine broke and I noticed the wire was also cracked...

forum.ih8mud.com

 

[RAB]

What year is your 80?

Yes, that's the ignition coil. Part # 19080-66010 and still available at Toyota dealers or online for ~ $120.

The wires are grounding cables and can be replaced with any similar gauge wire. I'd start here while checking the remainder of the grounding points in the engine bay. Battery to engine, battery to body, etc.

Ground wire help

I was working on some steering components tonight and noticed the ground wire that has multiple connections from under the charcoal canister, to behind the coil, then up to the intake and engine hanger. Two of the wires have clips, which one of mine broke and I noticed the wire was also cracked...

forum.ih8mud.com

Thanks for the reply.
My truck is a ‘97.

I ordered the Ignition coil lead wire P/N 9091913436.

The truck is starting and running as it should.
The main issue now is that the AC compressor won’t kick on and the alternator is throwing an error code saying that it’s bad (according to an Auto Zone employee).
Both the compressor & alternator were operating normally before frying the wires while jump starting the truck.

Could the ignition coil lead wire being bad be the reason for the compressor & alternator problems?

I’ve been searching for the secondary functions of the ignition coil pack to see if the bad wire has a direct effect on the other 2 components.

 

[uscmas412]

I’m not an electrical guy, but judging by your burnt grounds something not right happened that could have fried the other components. I’d start my checking all engine fuses and cabin fuses.

There’s an Electrical Wiring Diagram in the resources section.

Was the ignition coil lead fried as well? I’d try to get the codes AutoZome pulled and post them.

 

[TheBussman]

alternators can't throw codes. none of the error codes from the engine computer ever says that a part is bad. The codes give you a place to start diagnosis. Check all the fuses and if their OK it will need to be diagnosed, I wouldn't put much trust in autozone, not directly related to the coil.

 

[mudgudgeon]

In really basic terms ( coz I'm no electrical engineer), all electrical components need a circuit to supply voltage, and a circuit to take power to ground, (or back to the battery eventually). It's actually one circuit, with the component in the middle somewhere.

You have a couple of issues here.

First one, when jump starting, why did it fry these grounds? This is your primary problem.

Electricity follows the path of least resistance. If it's found ground through these wires, it suggests to me that your main ground wires from engine block to alternator, or battery to body are bad.
Check for loose bolts, corroded ground cables, broken cables, corroded battery terminals etc.
This needs to be fixed

Second,
If the wires that have fried are the ground wires for alternator and AC compressor, you don't have a good circuit for these two to work properly. You may still have an intermittent connection.

The AC circuit ( not 100% sure the AC circuit is in that vicinity??) will be for the electro-magnetic clutch on the compressor. This needs a continuous current to to stay engaged. An intermittent ground will mean it won't stay engaged. A bad ground may mean it doesn't get enough current through the circuit to engage at all.
No clutch worky = no AC chilly

Similar with the alternator. If you have an intermittent connection to ground, it may continue to trickle charge, but won't work at full capacity.

Fix the grounds first, then re-test the alternator.

Fair chance the Auto Zone dude has had monkey see monkey do training on how to check an alternator.
Alternator may be fine. Also may not, but fix the primary problem first, is also the cheapest problem to fix.

 

[jaymar]

While attempting to jump start my FJ80, I smoked the wires shown in the 2nd attached picture.
The part in question is Denso 067d which I believe is the ignition coil:

• the wires leading to the unit were charred during the jumping process
• the wires coming out of the unit look normal

The part has wires running to the A/C compressor and the alternator.
Prior to smoking the wires, everything on the truck was working as it should.

After getting the truck started the truck had, 2 parts that failed to operate - they are the:

• A/C compressor - it won't turn on. The fan blows but the compressor doesn't kick on when the A/C button is pushed.
• Alternator - 2 separate shops said that the alternator is bad. The truck starts normally and the battery seems to be keeping a normal charge.

It's odd that both major parts would go bad at the same time without some other issue/component being a contributing factor.


Questions:

• Could the A/C compressor and alternator malfunctions be due to smoking the wires running to the part shown (Denso 067d) in the attached photos?
• Could replacing the wires running to the ignition coil be a sufficient fix? Can that single 2 wire piece be sourced by itself?
• Should the coil be swapped for new?
• Does anyone have a reliable supplier that these specific replacement parts can be found?
• Is it likely that the internals of ignition coil was damaged? The truck has zero problems starting, idling or accelerating.

Prior to this setback, I was gearing up to make a trip from New Orleans towards the areas of Colorado, Utah, Arizona - I surely do not want this issue to present a failure while on the road.

Any help or ideas as to how to fix the problem would be appreciated.

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Recently picked up a new coil for my 95 from Amayama, so they're available. Try to figure out what smoked the last one first, so you don't smoke the new one too...