sidimaruf:


Sir, by actual values, do you mean we hook up a scanner to the car while test driving it? Pls explain more. I want to try that and see the results

Modified.........ps include the type of scanner to be used.

Yes, that's what he meant. You see signals flowing through the computer live (live PIDs). You can also record this, and then sit back to analyse later (called movie). Just like you have in Flight Data Recorder in airplanes.

Only advanced third party and OEM scanners can do that.

sidimaruf:
Below are the details:

At speeds below 50km/h

and cruising car at gear 3

Slowed down briefly for a poth hole

After passing poth hole

I expect the gear to downshift to 2, but gear goes to neutral for like 7 secs before getting back to appropriate gear. I know gear goes to neutral because rpm goes up when gas pedal is pressed.

Car has been scanned severally and no code came up.

Note that this does not happen when travelling at higher speeds.car does pretty well at higher speeds.
Tranny oil is ok upon inspection. I use type t4 (pinkish red, smells like syrup etc)


My kazeems suggest I clean the transmission filter

I dont want to touch nothing except I seek advice from the numerous informed car gurus here on NL.

Car is camry 2005

Pls help a bro.

Thank you.

From my understanding of OPs description, i would guess either a slipping gear or a kick down problem.

I experienced both with a 1996 Honda accord and my friend experienced slipping problem with his 2008 Honda accord.

The old accord would instead of shifting down to 2 after slowing down, it shifts to 1 which may be too low for the speed but instantly shifts to 2. So it shifts from say 4 - 1 - 2 instead of 4 - 2. The same car slips when changing from 3-4. It down shifts 4-3 normally but Revs up for some seconds before shifting to 4. During the high rev if foot is removed from accelerator, gear shifts to 4 immediately.

My friends car too revs up when shifting 1-2. In his case both down and up shifting to 2 will rev up the engine until foot is removed from accelerator or it takes about 5-10secs before engaging the gear.

I concluded engine revving up for up to 7secs before gear is engaged maybe slipping. My friend repaired his by changing a seal inside the transmission. Of course it was taken apart completely. I guess OP's problem is slipping at downshift to 2.

Cc Kashif

Kashif:


Bro, I can assure you nothing is wrong with your car, unless you have other symptoms. You may not have noticed it before now, as car is still relatively new to you.

Now, drive it like this and report your finding:- after you slow down to where you would normally experience this, press the throttle harder and see if you get this long delay.

Ok, I will try to notice it.
Thank you

Kashif:


Bro, I can assure you nothing is wrong with your car, unless you have other symptoms. You may not have noticed it before now, as car is still relatively new to you.

Now, drive it like this and report your finding:- after you slow down to where you would normally experience this, press the throttle harder and see if you get this long delay.

Ok, I will try to notice it.
Thank you

adanny01:


From my understanding of OPs description, i would guess either a slipping gear or a kick down problem.

I experienced both with a 1996 Honda accord and my friend experienced slipping problem with his 2008 Honda accord.

The old accord would instead of shifting down to 2 after slowing down, it shifts to 1 which may be too low for the speed but instantly shifts to 2. So it shifts from say 4 - 1 - 2 instead of 4 - 2. The same car slips when changing from 3-4. It down shifts 4-3 normally but Revs up for some seconds before shifting to 4. During the high rev if foot is removed from accelerator, gear shifts to 4 immediately.

My friends car too revs up when shifting 1-2. In his case both down and up shifting to 2 will rev up the engine until foot is removed from accelerator or it takes about 5-10secs before engaging the gear.

I concluded engine revving up for up to 7secs before gear is engaged maybe slipping. My friend repaired his by changing a seal inside the transmission. Of course it was taken apart completely. I guess OP's problem is slipping at downshift to 2.

Cc Kashif

Oga, this man's gear is not slipping. If it is, the atf will show it. He confirmed atf is still fresh, which does not happen in a slipping gear. It is just the way it was designed to behave. In transmission shift timing/feel issues, the first step is in seeing what the computer is commanding. OP can go for live data analysis if he so wishes but, I can't remember if the neutral feel ever shows there. If it is exactly as described by him, he has no issue per se.

It is easy to mistake this for a problem.

Kashif:


My fourth paragraph is on Toyota, go back and read it again.

I am surprised you are asking this basic question about calibration. So you think whatever in automobile's name that controls the transmission is not calibrated by the designers? You don't know it runs a software? Did I say a mechanic does the calibration? Is it about semantics now? Have you ever worked with a blank ECU/PCM before?

It is better you say you don't know, and then learn, instead of just arguing for the sake of it. Well, did you know that this transmission in question (in this Camry) actually has two 3rd gear ranges, and selects one depending on pressure? Technically, it has 6 speeds! The details are too technical for this discuss.

Up there I stated I wanted to learn . Pointer in 2 directions. Don't let us push this further have seen where you coming from if you talking about a blank pcm that's a rear case.being dealt with here in Naija owing to.the fact that you and I know what needs to come out from the pocket to keep this kind afloat. Software softwares we know. But calibration of a transmission for Camry 2005 is a NO for me sir. You might think it's a calibration using a blank pcm but it's not. Don't be too quick to say it's an argument. I don't see it this way it's all learning

Calibration of gear is possible on the MB, BMW were VGS and EGS respectively needs to be relearned in cases where transmissions are changed, where TCM are replaced and if one or 2 transmission components are replaced. These 2 control units have mentioned up there are integral parts of the transmission. In a case of a Toyota Camry 2005 no TCM all commands come from the pcm. If you replace pcm when you do the down programming transmission starts working without going into any fail safe mode. No reset of adaptive values on transmission is possible on a Toyota Camry 2005 sir

mayor2013:
Calibration of gear is possible on the MB, BMW were VGS and EGS respectively needs to be relearned in cases where transmissions are changed, where TCM are replaced and if one or 2 transmission components are replaced. These 2 control units have mentioned up there are integral parts of the transmission. In a case of a Toyota Camry 2005 no TCM all commands come from the pcm. If you replace pcm when you do the down programming transmission starts working without going into any fail safe mode. No reset of adaptive values on transmission is possible on a Toyota Camry 2005 sir

Did I mention adaptive reset for this car?

In this context, calibration=software=programming=logic done by Toyota on how the transmission works before it leaves their factory! You cannot modify it. I leave you to christen where this logic is stored in - TCM, ECU, PCM, ECM, but know that it is stored somewhere the processor(s) can access it. All you can do is reflash ECU with updated calibration if it is available. Are you now saying that all Toyotas that have adaptive memory reset functionality have a separate TCM?

Its obvious you have never seen this 'problem' before, the reason you think it was cable, filter etc.

I really do not see any other way to explain this to you. :

Kashif:


Did I mention adaptive reset for this car?

In this context, calibration=software=programming=logic done by Toyota on how the transmission works before it leaves their factory! You cannot modify it. I leave you to christen where this logic is stored in - TCM, ECU, PCM, ECM, but know that it is stored somewhere the processor(s) can access it. All you can do is reflash ECU with updated calibration if it is available. Are you now saying that all Toyotas that have adaptive memory reset functionality have a separate TCM?

Its obvious you have never seen this 'problem' before, the reason you think it was cable, filter etc.

I really do not see any other way to explain this to you. :

Now you are beginning to divert the subject matter. Anyways I would leave it for another day. Great having an argument with you

mayor2013:


Now you are beginning to divert the subject matter. Anyways I would leave it for another day. Great having an argument with you

LOL! All digressions came from you Oga. Now its obvious what you wanted - Argument!

Kashif:


LOL! All digressions came from you Oga. Now its obvious what you wanted - Argument!

Kashif is right

There is no issue with your car.

I own a Toyota sienna 06 and these same symptoms manifests on my ride. When you slow down after light acceleration and listen to your engine the car goes into neutral. If you accelerate immediately car will rev but if you allow those 3 seconds pass gear will engage again.

Please note on top speed and aggressive driving you won’t notice any of these

fishing:
Kashif is right


I own a Toyota sienna 06 and these same symptoms manifests on my ride. When you slow down after light acceleration and listen to your engine the car goes into neutral. If you accelerate immediately car will rev but if you allow those 3 seconds pass gear will engage again.

Please note on top speed and aggressive driving you won’t notice any of these

Exactly.
I hope no issue.
I have got no 400k for new tranny

Good mrnin bosses.

Quite interesting stuffs to learn here. I have a somewhat similar issue with my camry 2000.

Beginin frm a point of rest, my engine revs very high when shifting frm gear 1 to 2, it kld get as high as 4500rpms provided i throttle hard, takin some few seconds before it engages frm 1 to 2. However, if i suddenly take my foot off the pedal, it engages immediately.

Transition from gear 2-3, 3-4, 4-5 is smooth while car is already on speed.
I tried the 'driving uphill test', car kept on moving slowly and engine did not rev high.

My mechanic thought the atf oil filter may be blocked, so he loosed d oil filter when engine was cold, and put a new atf but problem has persisted.

What could be the problem pls?
Cc kashif Cc mayor2013

I have only ever owned German cars.

This issue the OP is talking is what i notice each time I have to drive a friend or colleague's Toyota. I thought it was a gear issue with the first car, but It has happened on every toyota I have driven, so now i just assumed it's the poor workmanship of the tranny. On my cars (Golf, Passat), shifting is instantaneous and even exaggerated.

On Toyota, RPM runs high when I depress the pedal suddenly without any corresponding change in speed, so I have to remove leg and wait a few seconds before car will respond.

If this is OP's first toyota, maybe he hasn't just gotten used to Japanese workmanship

Buy german. Haha.

dino2006:
Good mrnin bosses.

Quite interesting stuffs to learn here. I have a somewhat similar issue with my camry 2000.

Beginin frm a point of rest, my engine revs very high when shifting frm gear 1 to 2, it kld get as high as 4500rpms provided i throttle hard, takin some few seconds before it engages frm 1 to 2. However, if i suddenly take my foot off the pedal, it engages immediately.

Transition from gear 2-3, 3-4, 4-5 is smooth while car is already on speed.
I tried the 'driving uphill test', car kept on moving slowly and engine did not rev high.

My mechanic thought the atf oil filter may be blocked, so he loosed d oil filter when engine was cold, and put a new atf but problem has persisted.

What could be the problem pls?
Cc kashif Cc mayor2013

What's your rpm stationed when your car is ilding at a warm temperature

I would continue to say this. The best way to know if your gear shifts fine without any problem is to have you use a professional scan tool to monitor transmission shift performance.its all in there. Humans could be biased, humans could exhibit emotions but the computer would never

mayor2013:


What's your rpm stationed when your car is ilding at a warm temperature

Usually between 600 and 800 rpms

Inception:


I agree with you on this.

This may be simply the shift logic control at play here.

There may be probably nothing wrong with the transmission itself.

not only agree but 1st hand experience!
if u have not experienced this in an 02 -06 Camry, then u r probably heavy footed!
wen I left my Honda bulldog for a Camry, I just couldn't understand it, tot it was an ecm problem like a delay or something, when I drove another camry it was the same, I just bone the thing ....

cc aninweze

Kashif:


Oga, this man's gear is not slipping. If it is, the atf will show it. He confirmed atf is still fresh, which does not happen in a slipping gear. It is just the way it was designed to behave. In transmission shift timing/feel issues, the first step is in seeing what the computer is commanding. OP can go for live data analysis if he so wishes but, I can't remember if the neutral feel ever shows there. If it is exactly as described by him, he has no issue per se.

It is easy to mistake this for a problem.

boss why r u showing off naw?

all Toyota Camry users experience this, I cannot say for other brands, but Camry? if u r not experiencing this this u must be heavy footed and u will never experience the bliss of economy mpg!

obekediamondfuto:


boss why r u showing off naw?

all Toyota Camry users experience this, I cannot say for other brands, but Camry? if u r not experiencing this this u must be heavy footed and u will never experience the bliss of economy mpg!

I dont show off.

You think this is common, but a practicing technician thinks it is a problem, and arguing upandan. Is it not disturbing?

dino2006:
Good mrnin bosses.

Quite interesting stuffs to learn here. I have a somewhat similar issue with my camry 2000.

Beginin frm a point of rest, my engine revs very high when shifting frm gear 1 to 2, it kld get as high as 4500rpms provided i throttle hard, takin some few seconds before it engages frm 1 to 2. However, if i suddenly take my foot off the pedal, it engages immediately.

Transition from gear 2-3, 3-4, 4-5 is smooth while car is already on speed.
I tried the 'driving uphill test', car kept on moving slowly and engine did not rev high.

My mechanic thought the atf oil filter may be blocked, so he loosed d oil filter when engine was cold, and put a new atf but problem has persisted.

What could be the problem pls?
Cc kashif Cc mayor2013

Scan the car. Did you say you have 5th gear?

Kashif:


I dont show off.

You think this is common, but a practicing technician thinks it is a problem, and arguing upandan. Is it not disturbing?

the big boss, I sight u..... how u dey naw, I for come do 6months IT for ur workshop oh!

obekediamondfuto:


the big boss, I sight u..... how u dey naw, I for come do 6months IT for ur workshop oh!

LOL

Kashif:


Scan the car. Did you say you have 5th gear?

Ok i will go for a scan. I'm not too sure about the 5th gear. Used to think the car had one.
Thanks alot

obekediamondfuto:


not only agree but 1st hand experience!
if u have not experienced this in an 02 -06 Camry, then u r probably heavy footed!
wen I left my Honda bulldog for a Camry, I just couldn't understand it, tot it was an ecm problem like a delay or something, when I drove another camry it was the same, I just bone the thing ....

cc aninweze

The amount of seconds he posted is abnormal, even tho i observe this same delay daily in the camry, but his is a bit exaggerated. Or perculiar. Or both.

Last week I noticed a sudden transmission flare while driving as the gear was changing from 3rd to 4th. I called my mechanic who said gear needs servicing. I agreed and He did the necessary.
For 3 days transmission seemed to be smooth. I ran a scan on the car ND no faults were reported.
Yesterday on my way back from work, the CEL came on. Since the scanner was still in the OBD link port, I quickly ran a scan which returned
P0776- pressure control solenoid B performance or stuck off
P2714- Pressure control solenoid D performance or stuck off
P2808- Pressure control solenoid G performance or stuck off.
Soon free I noticed subtle jerks while driving. The car is still moving but I have parked at home as a precaution.
I hope my tranny is not fried.
I usually don't feel comfortable when cars start misbehaving.
Car is less than 3 years in Nigeria with 98000 mileage.
I need advice please.

mayor2013:
Calibration of gear is possible on the MB, BMW were VGS and EGS respectively needs to be relearned in cases where transmissions are changed, where TCM are replaced and if one or 2 transmission components are replaced. These 2 control units have mentioned up there are integral parts of the transmission. In a case of a Toyota Camry 2005 no TCM all commands come from the pcm. If you replace pcm when you do the down programming transmission starts working without going into any fail safe mode. No reset of adaptive values on transmission is possible on a Toyota Camry 2005 sir

I'm not a car technician. I'm just an electrical engineering graduate with programming skills.

From what I understood:
He never mentioned "calibration" as solution to the problem nor the problem itself. Calibration can be said, in this context to mean how the manufacturers, through some series of programming want their transmission to behave. That is to say, the delay is not a defect.. it's chosen by the programmer (manufacturer) and it's not what can be corrected by changing filters unless you have root access to the code and modify it.

That is not to say he is right (He might be). In every rule, there could be an exception. The delay could also be caused by other problems which might mimic calibration "errors".