DRL/Fog not turning off?

Aramis76

Nixin, that may work, but my DRL's stay on when the car is off. If they didn't turn on i'd have a case like you mention. The way they are acting now, I can never get a ticket for them!

I'm just hoping they don't try to weasel out of fixing it.

SouthArk370Z

Sounds like a great plan to me. Good luck.

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Nixin

I am reading you loud and clear bro, from the first post. I am just suggesting that the dealer needs to fix 'em as they are malfunctioning and eventually will lead to their eventual failure. Hence will not work at all. I am certain that the dealer will try to weasel their way out of it. Anything to take our hard earned $.

Aramis76

Quick update:

Dealer replaced the IPDM under extended warranty (which is ending in 1 week).

All is good again!

Nixin

Great stuff Aramis76. Thanks for the update. BTW, which dealer did you use?

SouthArk370Z

Nice

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Aramis76

Closest to me (less than 5km) is called Belvedere Nissan.

The service advisor actually lives on my street, nice coincidence!

Aramis76

Well this sucks but the problem is still there.

Took the car out for the first good ride since the repair today and the lights stayed on.

Hopefully the dealer will accept to keep working on it even though the warranty is out. I'll call on monday. Looking at the schematics, there's not much else that can be wrong, i'm scratching my head here...

Nixin

That really sucks Aramis76. Maybe have someone try to rewire the DRL's to their own separate switch.

Aramis76

I want to get to the bottom of this, but the schematics from the service manual are not helping much. The IPDM has a CPU, so you can trace the internal relay to the CPU, but then you can follow it anymore since it's in the "cloud" of digital commands.

At worst I could intercept the power going to the fog lamps (DRL) and add a relay to the ignition power to cut them out when the ignition is turned off, but that would only mask the issue.

I wish I could talk to a Nissan Mechanic about this

SouthArk370Z

You reported the problem before the warranty ran out. Since they haven't fixed it, they should keep working on it until they do.

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Aramis76

I'll talk the the service guy monday morning when they open, i'll let you know what happens!

Aramis76

Ok, here's how this story concludes:

They tried replacing the BCM under the extended warranty, but the problem persisted.

After spending some more time, they were out of ideas and since the warranty only pays a given amount of hours for specific jobs, they didn't know what to do anymore.

So, they told me I would have to start paying, they were certain a this point that it was either a short somewhere (which the extended warranty probably would not have covered anyway) or a damaged wire somewhere.

I gave them the go ahead for a few hours of detective work. And what do you know they found something after 2.5 hours. The previous owner had bypassed the DRL relay and tapped their power directly to the IPDM power. The mechanic was impressed by how well the re-wiring looked oem. They would have never noticed it if not for following wires one by one.

I guess the previous owner wanted the DRL on all the time, but he should have taken power somewhere that is controlled by ignition. Instead, tapping into the IPDM power means the fog lights only shut down when the modules go to sleep, which can take up to 45 minutes i'm told.

In retrospect, I knew something was odd because they always came on as soon as I started the car (even with handbrake on) but since I couldn't compare with another, I didn't make a big deal out of it.

So, all in all, it cost me 3 hours, but i still got a new IPDM and BCM out of it, so I can't complain and it now runs as it should.

SouthArk370Z

Thanks for the update. Glad to hear you figured it out.

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Nixin

Fantastic Aramis76. At last, the problem is solved!