Reverend D
Altima Moderator
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1574 posts
1995 Nissan D21 Hardbody KA24E
Western NY
1-12-2003
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Throttle position sensor. It's a wiper style resistor that wears out in certain spots causing the computer to freak out.
 
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RediNico
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40 posts
Lower Lake CA
3-19-2007
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| « Re: (Reverend D) | 1:48 PM 8/8/2008 |
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Thanks again Reverend.Is this sensor something I might be able to change myself? Cliff
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RediNico
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40 posts
Lower Lake CA
3-19-2007
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| « Re: (Reverend D) | 1:58 PM 8/8/2008 |
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I find this in my Haynes ManualSelf-Diagnosis System Trouble Codes (Mode III)
Display Code 43: ( 4 red flashes, 5 green flashes)
Malfunctioning Component/circuit: Throttle sensor
Check/repair procedure: The Throttle sensor circuit is open or shorted. This repair must be performed by a dealership service department. Is this the sensor to which you refer?
Will a qualified local mechanic be able to do this?
My nearest dealership is 60 miles away. Thanks
Cliff
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Reverend D
Altima Moderator
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1574 posts
1995 Nissan D21 Hardbody KA24E
Western NY
1-12-2003
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That would be the sensor I am talking about. It's a $50 small black box located on the back side of the throttle body. It's held in by 2 small screws, use a stubby screw drive to remove it. Remove the harness connected to then install the new one. Make a mental note the position of the old one and try to set the new one to the same angle so you don't have to re-adjust it.
#16259 in this picture.
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RediNico
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40 posts
Lower Lake CA
3-19-2007
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| « Re: (Reverend D) | 5:45 PM 8/8/2008 |
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That's very interesting and helpful.
Thank you.I called the nearest dealer and he quoted me $207 The Haynes manual says repair must be performed by dealer service department.
Any idea why?
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Reverend D
Altima Moderator
Offline
1574 posts
1995 Nissan D21 Hardbody KA24E
Western NY
1-12-2003
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Wow $207? Was $33 when I did it back in 1999. They probably tell you to take it to the dealer because of the adjustments to it that might be needed after the install. Plus Haynes sucks, the mech doing the work in that book is a *****.
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RediNico
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40 posts
Lower Lake CA
3-19-2007
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| « Re: (Reverend D) | 8:33 PM 8/8/2008 |
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Searching around I found another thread on the TCS where the correspondent mentioned $33 for after market and $300 OEM. Whew. Any idea where one gets an after market unit?
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RediNico
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40 posts
Lower Lake CA
3-19-2007
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| « Re: (RediNico) | 5:51 PM 8/12/2008 |
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I checked the ECU lights and verified your diagnosis of Throttle Control Sensor problem
Local Parts store provided for $85.
I removed the air filter to DIY install but decided I'm in the Haynes category 
Local mechanic will install for under an hour, probably best if it needs adjusting.Also found in the process that the top A.B. Valve hose is cracked.
Who knows? That could cause problems.
That had to be a dealer order and I can install that one. Thanks for the help
Cliff
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RediNico
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40 posts
Lower Lake CA
3-19-2007
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| « Re: (RediNico) | 1:57 PM 8/15/2008 |
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The Throttle Control Sensor either was/is not the problem
or maybe the tech did not adjust properly.
(what would be the symptoms in such a case.In either case, the symptoms persisted immediately after installation
on a triple digit temperature day. Of course, I have the "customer-self-diagnosis" jam on my face
as I slink back for their diagnosis. additional comments appreciated
Cliff
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Reverend D
Altima Moderator
Offline
1574 posts
1995 Nissan D21 Hardbody KA24E
Western NY
1-12-2003
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Damn, I could have swore it would be the TPS. My fathers 87 Pathfinder did the exact some thing for a long time. Mechanics all over town said it was this or that. He even had a short block installed with no change. I was working for a Toyota dealer at the time, one that also owned a Nissan franchise, I described the symptoms to a friend of mine, a Nissan tech who had been turning wrenches on Nissans since 1988, he said...TPS. I tried it, never stumbled again. Sorry this educated guess didn't work in your case. When you said "verified my diagnosis" how did you go about doing that?
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RediNico
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40 posts
Lower Lake CA
3-19-2007
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| « Re: TCS & other problems | 10:12 AM 8/16/2008 |
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I verified by reading the lights on the ECU.
Definitely came up TCS.
On another forum someone has suggested a short in the wiring to the TCS.
I'm trying to explore that now.BTW, what symptoms might one expect if the TCS was not adjusted properly? As always, suggestions appreciated. Cliff
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RediNico
Offline
40 posts
Lower Lake CA
3-19-2007
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| « Re: TCS & other problems (RediNico) | 1:16 PM 8/16/2008 |
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Someone has suggested a short in the wiring.
I'm looking into this and seems reasonable, however
I cannot get the wiring clip off the TCSsee this: http://www.thecriticalcrab.net....html Suggestions appreciated.
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Reverend D
Altima Moderator
Offline
1574 posts
1995 Nissan D21 Hardbody KA24E
Western NY
1-12-2003
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Use a small pick to lift the metal clip out of the sleeve it is sitting in. Be careful though, it can become a projectile in a hurry. Once that is out the plug should slide off.
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RediNico
Offline
40 posts
Lower Lake CA
3-19-2007
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| « Test Drive my truck | 5:40 PM 8/24/2008 |
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This thread could, I guess, warrant a change of title since I've now determined that the problem is not "pulling a grade" specific, but ambient temperature specific.To update: we changed the Throttle Position Sensor and the problem persists. So, I'm inviting anyone monitoring this thread to test drive my truck with me. We'll drive it when the ambient temp is under 85, when it is over 95, on the flat and on a grade. Hop in: http://thecriticalcrab.net/pos....html Let me know what you think
Cliff
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