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2002 Altima 3.5 se, ABS/TCS OFF lights on , No acceleration over 1500 rpm Forums > > 2002 Altima 3.5 se, ABS/TCS OFF lights on , No acceleration over 1500 rpm 2002 Altima 3.5 se, ABS/TCS OFF lights on , No acceleration over 1500 rpm
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  #1  
Old 07-08-2011, 06:34 PM
asghar asghar is offline
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2005 sentra
 
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Exclamation 2002 Altima 3.5 se, ABS/TCS OFF lights on , No acceleration over 1500 rpm

I had this car come over for intermittent No acceleration over 1500 rpm and everytime it happened ABS and TCS off lights woud come on and stay on for some time till you let go off the accelerator. or restart the engine.

No stored codes in PCM , BCM, TCM only one code of C1131 in ABS module. which i could not find in nissan database of dtc's.

everyone pointed towards Throttle body(electronic). since it was intermittent i hooked up all of my equipment in the shop "LOL" to take it for test drive and only to find That everytime it happens right after a split second of Battery Volatage Spiked over 18 volts, ABS and TCS off light would come on and rpm wont go over 1500.
Checked alternator Output it would go over 18.3 volts intermittently and would cause the rpm to drop to 1500 and ABS/TCSoff light come on.
Replaced the alternator and problem never came back ever since.

i assume there is some Protection system against Voltage spike by nissan but i could not find anything about that FAIL SAFE mode anywhere in service manuals or mitchell, alldata even called nissan they had no clue what was going on , they said it was common throttle body problem and recommended reman. throttle body.

posting here just may be someone else would benefit from this
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  #2  
Old 07-08-2011, 11:44 PM
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NissanTech NissanTech is offline
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2004 Xterra
 
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I'm not sure why the alternator is charging over 18.3 volts. It is possible that the alternator is not working properly, but it does sound like a bad throttle motor. The code may corroborate the problem.

C1131 = Electric throttle control abnormal.
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Last edited by NissanTech; 07-08-2011 at 11:51 PM.
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  #3  
Old 07-11-2011, 09:41 PM
asghar asghar is offline
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thanks for the reply, but as the post says i changed the alternator only and problem is gone.

it was just the aperant "Fail safe mode" to save electronics from bieng cooked from high voltage, as it was intermittant ecm will cut-off whenever it see the voltage spike to over 15 volts. and limit the rpm to maximum of 1500 to reduce the alternator output to go more higher.

by the way it was slow day today so i had time to put that faulty alternator in my 2002 Altima just to confirm my diagnosis and it did the same thing as customers altima so i am 100% sure it was only alternator.
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  #4  
Old 11-02-2013, 12:57 PM
BuddyL BuddyL is offline
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2002 Altima
 
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Had the same symptoms on my '02 Altima 3.5SE. I idled my way home and spent a couple days trying to figure out what was wrong with the ABS system. I read "asghar's" post and I checked the alternator output and found 18.6 volts! I changed the alternator; not fun; problem solved. Thanks to "asghar" for the posting!
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  #5  
Old 07-28-2014, 10:11 AM
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d0ugmac1 d0ugmac1 is offline
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2003 Altima
 
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Ditto with my '03 3.5SE manual.

Detailed everything about the symptoms and the alternator re&re here:

'03 Altima Alternator Insanity - Nissan Forums : Nissan Forum
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  #6  
Old 03-06-2017, 01:01 PM
Jeremy Jeremy is offline
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2002 Altima Sedan
 
Join Date: Mar 2017
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I found this posting extremely useful. I am a re-certified ASE Master tech and Certified Advanced Level Specialist. I to had the same symptoms on a 2002 Altima that I was working on. I noticed a battery voltage of 14 to 17 volts. I unplugged the alternator signal connector but voltage was still to high, so I disconnected the alternator battery terminal, and that did it the engine would rev properly after testing for a while the engine still revved properly. Thanks for this post it was very helpful...
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  #7  
Old 03-07-2017, 06:10 PM
Soapmyster Soapmyster is offline
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2005 Altima
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thank you for posting this.
Glad to see someone posting positive threads.
I would have suggested the ground cable from the battery to the trans, from trans to unibody.
rots off at any of the 3 points
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