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Old 10-02-2011, 12:30 AM   #21
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Most Toyota dealerships that I've been to aren't very customer friendly. They rely on the reputation of Toyota cars and trucks to do the selling for them. What are the laws in Nevada regarding used cars? Do they have a "lemon law" for used cars there? As stated above, the problem with your truck was probably why it was for sale in the first place. The original owner might have had problems with it and traded it in to the dealer that way. Did the dealership offer a warranty when you bought it? You might want to look into your legal rights before you talk with their service manager.
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Old 10-02-2011, 01:18 PM   #22
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Quote:
Originally Posted by KenLyns View Post
Examine your gas pedal closely. Was it trimmed as part of the recall?

Pic: http://i125.photobucket.com/albums/p...3/59782de9.jpg

Wonder if the technician butchered one of the resolvers in the gas pedal assy in the process. They take the whole assy out (two bolts), clamp it in a vice, and hacksaw away. The service manual even says to avoid impact with the gas pedal assy. They could have also bent a connector pin or pinched a wire.

A new gas pedal assy is $135 online, by the way: http://www.villagetoyotaparts.com/sh...roduct=2329134

is the bottom trimmed? not really sure what to look for.
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Old 10-02-2011, 01:23 PM   #23
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Yes, trimming is done at the bottom, see:
http://www.tacomaworld.com/forum/2nd...ml#post2093454

Basically I'm speculating the dealer damaged the pedal in the process of removing, reworking or installing the pedal.
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Old 10-02-2011, 01:24 PM   #24
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Quote:
Originally Posted by lmcc007 View Post
Most Toyota dealerships that I've been to aren't very customer friendly. They rely on the reputation of Toyota cars and trucks to do the selling for them. What are the laws in Nevada regarding used cars? Do they have a "lemon law" for used cars there? As stated above, the problem with your truck was probably why it was for sale in the first place. The original owner might have had problems with it and traded it in to the dealer that way. Did the dealership offer a warranty when you bought it? You might want to look into your legal rights before you talk with their service manager.

no lemon law. already looked into that. and yes on warrenty trucl was "certified" pre owned and also purchased 2K gold level warrenty
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Old 10-02-2011, 01:25 PM   #25
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Quote:
Originally Posted by KenLyns View Post
Yes, trimming is done at the bottom, see:
http://www.tacomaworld.com/forum/2nd...ml#post2093454

Basically I'm speculating the dealer damaged the pedal in the process of removing, reworking or installing the pedal.

ok ill look when i get home. ill pull it out and check pins and harness
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Old 10-02-2011, 01:29 PM   #26
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What does it cost for a TPS? You might want to replace it for peace of mind. I don't think it would be hard to replace- but I have not done it on a Tacoma. I work on city buses. It is just 2 screws and a harness on a bus.
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Old 10-02-2011, 01:52 PM   #27
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There's no traditional TPS in throttle-by-wire vehicles. Typically there are two resolvers in the gas pedal assy. If the two resolvers send different angles to the ECU (either due to a damaged resolver or wire/connector), the ECU should command the butterfly valve to idle as a failsafe.
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Old 10-02-2011, 03:01 PM   #28
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Quote:
Originally Posted by 84Hilux View Post
What does it cost for a TPS? You might want to replace it for peace of mind. I don't think it would be hard to replace- but I have not done it on a Tacoma. I work on city buses. It is just 2 screws and a harness on a bus.

well then why did i waste my 2 grand on the extended warrenty??
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Old 10-02-2011, 03:02 PM   #29
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Quote:
Originally Posted by KenLyns View Post
There's no traditional TPS in throttle-by-wire vehicles. Typically there are two resolvers in the gas pedal assy. If the two resolvers send different angles to the ECU (either due to a damaged resolver or wire/connector), the ECU should command the butterfly valve to idle as a failsafe.
which is exactly what happens while doing 70 next to a semi with no lane to be in but the shoulder.

oh yea looked at pedal and yes recall was done. does the pedal come with the sensor? cause if thats the case ill just make the pedal crack then they gotta warranty it lol
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Old 10-03-2011, 09:11 AM   #30
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Pedal and sensors come as a complete assy (the one that sells for $135 online). No further disassembly should be done as the internal components are as delicate as a watch.

Did you check the connector pins and wires?
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Old 10-03-2011, 06:55 PM   #31
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Quote:
Originally Posted by wbr775 View Post
well then why did i waste my 2 grand on the extended warrenty??
I agree with you on this- if the codes are present in the ECM Toyota should not have to reproduce the problem to attempt action. I only suggested changing the TPS assembly to eliminate it as a potential source of the problem. Also, you would get to have a good look at the connector pins while changing it. I have seen situations where the female end of the pin is spread open too wide to make reliable contact. I have also seen some where the male end of the pin is off-center and is forced in next to the female end rather than inside of it. A third possibility is a bad crimp on a pin, or the lock that holds the pin into the connector is bent and not holding it firmly.

The fact that codes were present would imply that the ECM lost connection with the throttle position sensor on the pedal. Could be due to wiring harness or connector pins. On buses there is a single potentiometer(resolver) to measure the pedal position. It is possible on a single pot setup to have the potentiometer fail due to weakening of the wiper spring. I believe that the Tacoma uses a dual potentiometer setup, so to have both fail is unlikely. You should look for your problem in an area that is common to both potentiometers. For example- maybe they both share a common power supply wire or ground. I am going to see if I can find schematics on this and let you know. I am not sure how the ECM would interpret differing values from the two potentiometers- I would expect it to generate a code and a maintenance light. It seems that to have the system failsafe to throttle fully shut would defeat the purpose of having two pots. It would be nice to know exactly what codes were generated- I have access to Mitchell online at work and I could check out what it says about the codes for you.
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Old 10-03-2011, 09:13 PM   #32
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Quote:
Originally Posted by 84Hilux View Post
I agree with you on this- if the codes are present in the ECM Toyota should not have to reproduce the problem to attempt action. I only suggested changing the TPS assembly to eliminate it as a potential source of the problem. Also, you would get to have a good look at the connector pins while changing it. I have seen situations where the female end of the pin is spread open too wide to make reliable contact. I have also seen some where the male end of the pin is off-center and is forced in next to the female end rather than inside of it. A third possibility is a bad crimp on a pin, or the lock that holds the pin into the connector is bent and not holding it firmly.

The fact that codes were present would imply that the ECM lost connection with the throttle position sensor on the pedal. Could be due to wiring harness or connector pins. On buses there is a single potentiometer(resolver) to measure the pedal position. It is possible on a single pot setup to have the potentiometer fail due to weakening of the wiper spring. I believe that the Tacoma uses a dual potentiometer setup, so to have both fail is unlikely. You should look for your problem in an area that is common to both potentiometers. For example- maybe they both share a common power supply wire or ground. I am going to see if I can find schematics on this and let you know. I am not sure how the ECM would interpret differing values from the two potentiometers- I would expect it to generate a code and a maintenance light. It seems that to have the system failsafe to throttle fully shut would defeat the purpose of having two pots. It would be nice to know exactly what codes were generated- I have access to Mitchell online at work and I could check out what it says about the codes for you.

ah gotcha well i would love to give u the codes but....... good news!! went talked to service manager had my truck into shop and rental car 10 mins later! very happy now!! now if only they would call me back and tell me whats goin on lol
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Old 10-03-2011, 09:24 PM   #33
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It's amazing how their attitudes change once you mention the word "Lawsuit" especially when it comes to a safety issue.
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Old 10-03-2011, 10:01 PM   #34
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Quote:
Originally Posted by 84Hilux View Post
It seems that to have the system failsafe to throttle fully shut would defeat the purpose of having two pots.
Remember this is throttle-by-wire. The purpose of dual sensors is to prevent unintended acceleration should a single sensor erroneously indicate full-throttle. If the two sensors indicate different pedal angles, there is no way to know which one is correct, so defaulting to idle is considered "safe" in comparsion. For the same reason the two sensors have separate power and grounds. The ECU probably has separate command and monitor lanes, too.

The sensors are hall-effect type, not pots or RVDTs. (CTS pedal shown. Denso pedal similar.)
http://www.ctscorp.com/automotive/datasheets/703.pdf
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Old 10-05-2011, 02:02 PM   #35
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Two hall effect sensors would never send the exact same values. If the discrepancy exceeds that amount, it would cause a failsafe routine and check engine light. Yes- there are separate power and ground to these units- they are more complex than the ones I have serviced on buses.

According to some of the websites I checked out- A discrepancy that exceeds a certain amount causes the ECM to shut down power to the throttle opening unit KenLyns is correct. There is supposed to be a limp mode that allows the truck to idle high enough to get it in gear and move it out of trouble. I doubt that would have helped much in the OP's highway merge scenario.
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Old 10-06-2011, 01:43 AM   #36
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Toyota has had problems with ECM's in the past, so it's worth looking into. ECM problems are famous on the 2001-2003 RAV4's. The ECM's were giving false/faulty readings to the transmission causing the car to jerk wildly when you hit the gas. My girlfriend started having these same problems in 2009 with her 2002 and that's when I found out about it through online forums and such. At first Toyota of North America wouldn't do anything even though they had a service bulletin out on the ECM since 2005. They already knew of the problem, but werent doing anything to fix it. I bought an ECM and fixed the problem myself. Several months later my girlfriend got a letter from Toyota stating that they would reimburse us if we fixed the problem as long as we has a receipt for parts and labor. Not only were they willing to pay for the ECM, but also the trans if the ECM caused it to fail prematurely (which a lot did). We actually saved the trans by not driving it after the problem started. Someone must have put a scare into Toyota if they were willing to do this after first denying that there was a problem. My point...keep ALL of your receipts and take notes of who you talked to, when you talked to them, and what they told you. Eventually they should do the right thing, you just have to fight them for it.
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Old 10-06-2011, 02:11 AM   #37
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Quote:
Originally Posted by lmcc007 View Post
Most Toyota dealerships that I've been to aren't very customer friendly. They rely on the reputation of Toyota cars and trucks to do the selling for them. What are the laws in Nevada regarding used cars? Do they have a "lemon law" for used cars there? As stated above, the problem with your truck was probably why it was for sale in the first place. The original owner might have had problems with it and traded it in to the dealer that way. Did the dealership offer a warranty when you bought it? You might want to look into your legal rights before you talk with their service manager.
And Reno Toyota is the worst. I'll never go there again. I wish I'd bought my truck in Carson City.
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Old 10-06-2011, 05:08 PM   #38
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And Reno Toyota is the worst. I'll never go there again. I wish I'd bought my truck in Carson City.
agreed!!!! ok so got truck back today!!! had it for four days gave me a camry to drive in meantime those are piles!!! dont do well off road at all!!! its ok cause it was a rental!!! anyways they said they found a short in the blue wire going to the tps...im calling bs but we will see if it does it again or if it really is fixed. glad i bought the warranty!! invoice said $668.00 luckily deductible is only $50 so yea hopefully all is well now. majkong lets go wheeling!!!
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Old 10-06-2011, 05:20 PM   #39
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agreed!!!! ok so got truck back today!!! had it for four days gave me a camry to drive in meantime those are piles!!! dont do well off road at all!!! its ok cause it was a rental!!! anyways they said they found a short in the blue wire going to the tps...im calling bs but we will see if it does it again or if it really is fixed. glad i bought the warranty!! invoice said $668.00 luckily deductible is only $50 so yea hopefully all is well now. majkong lets go wheeling!!!
deductible? I would fight that even if it is only $50.
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Old 10-06-2011, 05:21 PM   #40
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deductible? I would fight that even if it is only $50.
at this point im just glad to have my truck back. i could careless bout it anymore
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