Temperature Gauge and Fan
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stevenmamos
- SE Member
- Posts: 22
- Joined: Sun Nov 27, 2011 9:19 pm
- Year and Trim: 2004 Pontiac Bonneville SE
Temperature Gauge and Fan
My 2004 Bonneville instrument cluster is going nuts. My temperature gauge is off the charts, pointing at 6 o'clock. Does this interfere with the operation of my fans? I haven't found a clearcut answer concerning this. I just don't want to be driving it around risking it overheating. Help, please!
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01bonneSC
- Certified Bonneville Nut
- Posts: 4938
- Joined: Sat May 24, 2008 5:18 pm
- Year and Trim: 05 Chevy 'Hoe
1997 'maro (3.8L M5)
89 SkiDoo - Location: Sycamore, IL
Re: Temperature Gauge and Fan
Like the needle is opposite of the actual hash marks?
Could be a cluster issue. Some others will chime in.
Could be a cluster issue. Some others will chime in.
00Beast wrote:Less off-topic than Lane's Heated Steering wheel, but yeah, back to the topic.
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01bonneSC
- Certified Bonneville Nut
- Posts: 4938
- Joined: Sat May 24, 2008 5:18 pm
- Year and Trim: 05 Chevy 'Hoe
1997 'maro (3.8L M5)
89 SkiDoo - Location: Sycamore, IL
Re: Temperature Gauge and Fan
delete
Last edited by 01bonneSC on Tue Jun 05, 2012 1:49 pm, edited 1 time in total.
00Beast wrote:Less off-topic than Lane's Heated Steering wheel, but yeah, back to the topic.
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sandrock
- Retired Gearhead
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- Joined: Mon May 19, 2008 2:14 pm
- Year and Trim: '00 SSEi (proj), '99 Tahoe & '05 Bonne GXP
- Location: Orlando Fl
- Contact:
Re: Temperature Gauge and Fan
The temperature signal goes directly to the PCM. The PCM then spits out a signal via Class II data to the instrument cluster, which interprets all the data on the Class II bus that it sees (like the temp, tach, speed, oil pressure, etc).
Your needle, then, has no bearing on cooling fan operation. Sounds like a stepper motor either went out or is out of sync. Remove the cluster and take off the lens, then replace the cluster. If you don't have access to a scantool that will show temp, I would do this next step with a cold motor. Turn the key on and let the cluster do its song and dance, then GENTLY with your finger run the needle to the cold notch, then turn it off. Turn ignition back on and let the cluster do its thing again, and see where the needle lands this time. You may have to do this several times to get it to be in the ballpark (it will never be, nor was it ever meant to be totally accurate).
If you DO have a scan tool that shows temp (as the PCM sees it), move the needle to where the PCM says it should be.
Your needle, then, has no bearing on cooling fan operation. Sounds like a stepper motor either went out or is out of sync. Remove the cluster and take off the lens, then replace the cluster. If you don't have access to a scantool that will show temp, I would do this next step with a cold motor. Turn the key on and let the cluster do its song and dance, then GENTLY with your finger run the needle to the cold notch, then turn it off. Turn ignition back on and let the cluster do its thing again, and see where the needle lands this time. You may have to do this several times to get it to be in the ballpark (it will never be, nor was it ever meant to be totally accurate).
If you DO have a scan tool that shows temp (as the PCM sees it), move the needle to where the PCM says it should be.
2005 GXP - White Gold Pearl, no mods...yet.
2000 SSEi - Resurrection in progress. Built L67 w/L32 fuel rail, ported heads, and cam. Camaro front brake system, GXP cluster, and much more in planning.
2000 SSEi - Resurrection in progress. Built L67 w/L32 fuel rail, ported heads, and cam. Camaro front brake system, GXP cluster, and much more in planning.
BonneMe wrote:Looks like a Volt, Sonata, and Taurus got it on.