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Dash Cluster Intermittent Issue R34

sleptema

By sleptema,
in General Maintenance

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sleptema Proficient

sleptema

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So this morning I went to drive and when I turned on my car the tachometer would not work, and the ABS and TCS light stayed on. Turned off, waited 30 seconds, and tried again with same result. Obviously there was an issue, so I shut her off and drove my daily, as I was already late I couldn't afford to sit there and diagnose it.

I came home in the afternoon and decided to check it out. Only, it is now working fine. YAY FOR INTERMITTENT!

So a few things:

- I drove it to work on Monday with no issues, been sitting since then. Never happened before.
- It was raining this morning, and it was early when I started it (morning dew early). It has never been an issue before, but obviously in the afternoon, all the wetness and moisture has disappeared.

- ABS and TCS rely on wheel speed sensors, that is what connects them, but the not sure how the tacho receives it's signal.
- Every other gauge including triple gauges worked, and back lights worked.

Feel free to ask me any questions. The only place I would start looking would be behind the dash, but honestly I have no idea.

I will try and start it tomorrow morning early and hopefully nothing is wrong and it was just an omen to not drive my car for some reason today.

Cheers.

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https://www.sau.com.au/forums/topic/442942-dash-cluster-intermittent-issue-r34/
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mad082 Grand Master

mad082

Posted
Posted

The tacho receives it's signal from the ecu, which receives it's signal from the cas. Your problem is with the ecu to tacho signal, or the tacho itself, because if it was the signal between the cas and ecu the car wouldn't run.

Victory Mentor

Victory

Posted
Posted

I have had a few R33 tachos play up over the years. It would appear that they suffer from the cracked solder joint issue that causes the tacho to either simply stop working or work intermittently and provide weird readings.

The last one I had it was a simple task to just remove the cluster from the car and swap the tacho with one that I knew worked from another cluster.

sleptema Proficient

sleptema

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The tacho receives it's signal from the ecu, which receives it's signal from the cas. Your problem is with the ecu to tacho signal, or the tacho itself, because if it was the signal between the cas and ecu the car wouldn't run.

Yeah for sure. Cheers for the info! Wasn't sure where that feed came from..

I have had a few R33 tachos play up over the years. It would appear that they suffer from the cracked solder joint issue that causes the tacho to either simply stop working or work intermittently and provide weird readings.

The last one I had it was a simple task to just remove the cluster from the car and swap the tacho with one that I knew worked from another cluster.

Yeah I may just take the cluster out and re-solder all the pins on the connectors, and I will look for dry joins.

Still, the ABS and TCS light is a mystery though.

  • 5 weeks later...

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