In addition to the above, I noticed the bulletin reflected 42811 as an updated model number to 42810. The 42811 in the car was already malfunctioning and the 42651 resolved some of the earlier problems I noticed (save for this gear 4 issue).

kayphyzee:


I bought another ECU about two Saturdays ago at Ladipo.
After changing the ECU, the temp gauge began working, I could scan the car, the harsh reverse stopped, the overdrive buttons and cruise control started functioning. So I reckon it was a good buy.

ECU number is 89661-42651. I just checked the bulletin you referred me to and noticed 42651 is one of the ECU marked to be changed with 42653. Other than the gear 4, I confirm that all the other functions of the car are in order. The previous ECU was 42811.

In addition to the above, I noticed the bulletin reflected 42811 as an updated model number to 42810. The 42811 in the car was already malfunctioning and the 42651 resolved some of the earlier problems I noticed (save for this gear 4 issue).

Any other idea?

i have some other ideas.
1. the gear 4 may have been damaged as a result of continued driving of the car with the ecu/gear problem

2. the ecu you removed may have been defective, for your cruise control and other stuff not to have been working - this is ladipo now, the usually recycle all these parts, am fairl certain if you left that your old ecu for them, they would attempt to resell to another person, if e no work well, the person return am

3. am afraid your problem may not have been permanently solved, as some rav4 are known to drive well after ecu change, but old symptoms reappear after 1 to 4months , lets pray am wrong though.

when last did you change your gear fluid?..and i hope its toyota type T IV, you put inside. would recommend a simple drain, and refill, and if the fluid smells/appears brown/burnt...then you go the extra mile of dropping the pan, remove and wash the filter with petrol and reinstall.
-- you may be suprised, that i do this service on my cars myself at home---

since you can now scan the car, what are the error codes showing?. did you buy the car as fresh toks or naija used...if naija used, the previous owner may hv changed the ecu.

lastly, if i were in your shoes, i would have followed the toyota tsb, searched and bought one of the recommended ecus, as listed there

earthrealm:


i have some other ideas.
1. the gear 4 may have been damaged as a result of continued driving of the car with the ecu/gear problem

2. the ecu you removed may have been defective, for your cruise control and other stuff not to have been working - this is ladipo now, the usually recycle all these parts, am fairl certain if you left that your old ecu for them, they would attempt to resell to another person, if e no work well, the person return am

3. am afraid your problem may not have been permanently solved, as some rav4 are known to drive well after ecu change, but old symptoms reappear after 1 to 4months , lets pray am wrong though.

when last did you change your gear fluid?..and i hope its toyota type T IV, you put inside. would recommend a simple drain, and refill, and if the fluid smells/appears brown/burnt...then you go the extra mile of dropping the pan, remove and wash the filter with petrol and reinstall.
-- you may be suprised, that i do this service on my cars myself at home---

since you can now scan the car, what are the error codes showing?. did you buy the car as fresh toks or naija used...if naija used, the previous owner may hv changed the ecu.

lastly, if i were in your shoes, i would have followed the toyota tsb, searched and bought one of the recommended ecus, as listed there

You have given me some ideas now. I still have the old ECU with me at home.

Car bought as used. Noticed the former owner had changed the ECU because there were dark stains around the glove compartment.

After purchase, I drained the transmission fluid and relaxed with a Toyota Type T-IV. Scan did not bring up any transmission code.

kayphyzee:


You have given me some ideas now. I still have the old ECU with me at home.

Car bought as used. Noticed the former owner had changed the ECU because there were dark stains around the glove compartment.

After purchase, I drained the transmission fluid and relaxed with a Toyota Type T-IV. Scan did not bring up any transmission code.

can u rescan and post the codes?
complete a drive cycle... ie drive the car around for like 15mins.... , without turning off the car, scan the vehicle and post the codes....

some other issues can make the system fail-safe and lock out the 4th gear, like the knock sensor....

obekediamondfuto:


can u rescan and post the codes?
complete a drive cycle... ie drive the car around for like 15mins.... , without turning off the car, scan the vehicle and post the codes....

some other issues can make the system fail-safe and lock out the 4th gear, like the knock sensor....

Hmmm, knock sensor. I read up on this one too. I'll give it a try and let you know (that's the drive around and scan).

After my mechanic fixed the new engine, he informed me that the rpm was above 1000 when he was test driving the vehicle. Once the temp Guage gets to the mid-point, the vehicle will start losing power. So he said he checked the installation again and noticed that the knock sensor wire wasn't installed properly. According to him, he had to refix the knock sensor wires and that corrected the problem.

Now the car idles at 800-900.

obekediamondfuto:


can u rescan and post the codes?
complete a drive cycle... ie drive the car around for like 15mins.... , without turning off the car, scan the vehicle and post the codes....

some other issues can make the system fail-safe and lock out the 4th gear, like the knock sensor....

Hello bro, I have been up to a lot of things lately. My apologies I had yet to give you a feedback. Okay, so I did as you said and one of the transmission related code that popped up was P1725 - NT Revolution Sensor Circuit Malfunction.

We removed the Input sensor, replaced it with another sensor but still the code did not clear off. Traced the wiring and it apppears fine.

Finally, my Mechanic called a Gear Specialist who looked at the connections, drove around for a while to monitor the performance of the Vehicle. He depressed the O/D button which was illuminated on the dash but it didn't appear to have any effect on the gear on speed. His verdict:

- My mechanic has to bring down the gear. The gear specialist will open the system to confirm the parts that need replacement. He was emphatic about valve body and fibre (saying he would have to change those two parts). He said something about a 'cup', saying that the cup could be dry hence the reason the 4th gear is not engaging.

I have told my Mechanic that I need to consult some other people before allowing any work on the gear (or else, I would rather buy another gear).

What do you think?

kayphyzee:


Hello bro, I have been up to a lot of things lately. My apologies I had yet to give you a feedback. Okay, so I did as you said and one of the transmission related code that popped up was P1725 - NT Revolution Sensor Circuit Malfunction.

We removed the Input sensor, replaced it with another sensor but still the code did not clear off. Traced the wiring and it apppears fine.

Finally, my Mechanic called a Gear Specialist who looked at the connections, drove around for a while to monitor the performance of the Vehicle. He depressed the O/D button which was illuminated on the dash but it didn't appear to have any effect on the gear on speed. His verdict:

- My mechanic has to bring down the gear. The gear specialist will open the system to confirm the parts that need replacement. He was emphatic about valve body and fibre (saying he would have to change those two parts). He said something about a 'cup', saying that the cup could be dry hence the reason the 4th gear is not engaging.

I have told my Mechanic that I need to consult some other people before allowing any work on the gear (or else, I would rather buy another gear).

What do you think?

This code is the reson why your car cannot go into gear 4.
if checking the sensor and wiring checks out, then i am afraid your ECU might be the culprit, again.
please provide the VIN number of your car the check for the compatible ECUs.

kayphyzee:


Hello bro, I have been up to a lot of things lately. My apologies I had yet to give you a feedback. Okay, so I did as you said and one of the transmission related code that popped up was P1725 - NT Revolution Sensor Circuit Malfunction.

We removed the Input sensor, replaced it with another sensor but still the code did not clear off. Traced the wiring and it apppears fine.

Finally, my Mechanic called a Gear Specialist who looked at the connections, drove around for a while to monitor the performance of the Vehicle. He depressed the O/D button which was illuminated on the dash but it didn't appear to have any effect on the gear on speed. His verdict:

- My mechanic has to bring down the gear. The gear specialist will open the system to confirm the parts that need replacement. He was emphatic about valve body and fibre (saying he would have to change those two parts). He said something about a 'cup', saying that the cup could be dry hence the reason the 4th gear is not engaging.

I have told my Mechanic that I need to consult some other people before allowing any work on the gear (or else, I would rather buy another gear).

What do you think?

that is the problem with the vehicle.....
don't allow them do anything yet oh....

https://www.justanswer.com/toyota/6ddbj-toyota-camry-2002-camry-shows-p1725-code-engine.html

simple quick checks.....

only concern is whether they didn't tamper with the ECU wiring when they swapped ECU.... if u are good with DIY... I can give u some tips on how to probe wiring with an ECU wiring diagram.


https://www.youtube.com/watch?v=7c3l5xJiy6s
you should be able to do this on ur own.... check the wiring....
most kazeems when they change stuff in ur engine as far as they ain't familiar with what a wire does.... it doesn't do Jack to them.... they can yank it off or even break it at some odd point.....

modified : if u have done all that and u are sure it's the correct sensor u guys have been troubling shooting ....
then go with motor guru's advise....

MotorGuru:

This code is the reson why your car cannot go into gear 4.
if checking the sensor and wiring checks out, then i am afraid your ECU might be the culprit, again.
please provide the VIN number of your car the check for the compatible ECUs.

Thanks for your feedback. This is the VIN - JTEGH20V410015967.

Please recall I said we changed the Sensor and the tokunbo sensor returned with the same code. Could it be possible that the tokunbo sensor we put is also faulty?

obekediamondfuto:


that is the problem with the vehicle.....
don't allow them do anything yet oh....

https://www.justanswer.com/toyota/6ddbj-toyota-camry-2002-camry-shows-p1725-code-engine.html

simple quick checks.....

only concern is whether they didn't tamper with the ECU wiring when they swapped ECU.... if u are good with DIY... I can give u some tips on how to probe wiring with an ECU wiring diagram.




https://www.youtube.com/watch?v=7c3l5xJiy6s
you should be able to do this on ur own.... check the wiring....
most kazeems when they change stuff in ur engine as far as they ain't familiar with what a wire does.... it doesn't do Jack to them.... they can yank it off or even break it at some odd point.....

modified : if u have done all that and u are sure it's the correct sensor u guys have been troubling shooting ....
then go with motor guru's advise....

Checking this video ASAP. I will appreciate the tips on the ECU wiring. I was in Ladipo on Saturday but could not find the ECU we discussed earlier i.e. 89661-42563.

obekediamondfuto:


that is the problem with the vehicle.....
don't allow them do anything yet oh....

https://www.justanswer.com/toyota/6ddbj-toyota-camry-2002-camry-shows-p1725-code-engine.html

simple quick checks.....

only concern is whether they didn't tamper with the ECU wiring when they swapped ECU.... if u are good with DIY... I can give u some tips on how to probe wiring with an ECU wiring diagram.


https://www.youtube.com/watch?v=7c3l5xJiy6s
you should be able to do this on ur own.... check the wiring....
most kazeems when they change stuff in ur engine as far as they ain't familiar with what a wire does.... it doesn't do Jack to them.... they can yank it off or even break it at some odd point.....

modified : if u have done all that and u are sure it's the correct sensor u guys have been troubling shooting ....
then go with motor guru's advise....

Quick one, I observed in the video that the pin underneath the sensor is out. Meanwhile, the one in my car and the replacement are not (aligns with the bottom of the sensor). Is there a way one can test?

kayphyzee:


Quick one, I observed in the video that the pin underneath the sensor is out. Meanwhile, the one in my car and the replacement are not (aligns with the bottom of the sensor). Is there a way one can test?

the video was to point u in the right direction.... but that code signifies where the problem possibly lies....the vehicle in the video is different from. urs... it's what I could pull off the net at the time for ur P code....

u can just guide ur Mech ..

hold I'm scouting the net for materials that can aid in troubleshooting

hello Mr k.... from what I see, the best option is to take this vehicle to a professional to diagnose.

first of all ur vehicle has a zero tolerance for near matching ECUs it has to be just perfect for everything to work well....

secondly if it's an ecu issue, then the mechanic that wants to drop and repair ur gearbox is just wasting money.....

thirdly, let's pray u don't have to buy another gearbox cos prolonged use of wrong ecu in this particular model is known to create problems in the gearbox....

take it to a reputable technician that can diagnose and tell u exactly what to buy.

if it were me sha, I'd scout places looking for where I can get that matching ecu first and test run it in the vehicle without buying it.... if it works then fine... if it doesn't I'll return it and pay testing fee.

obekediamondfuto:


the video was to point u in the right direction.... but that code signifies where the problem possibly lies....the vehicle in the video is different from. urs... it's what I could pull off the net at the time for ur P code....

u can just guide ur Mech ..

hold I'm scouting the net for materials that can aid in troubleshooting

OH, yes we identified the sensor in context. The Mechanic removed it and replaced with another one (a tokunbo he had with him). He erased the Code, I drove the car around for a while but the gear 4 didn't engage. By the time I got back to his workshop and he scanned again, the P1725 was back. So reinstall my old sensor into the vehicle.

obekediamondfuto:
hello Mr k.... from what I see, the best option is to take this vehicle to a professional to diagnose.

first of all ur vehicle has a zero tolerance for near matching ECUs it has to be just perfect for everything to work well....

secondly if it's an ecu issue, then the mechanic that wants to drop and repair ur gearbox is just wasting money.....

thirdly, let's pray u don't have to buy another gearbox cos prolonged use of wrong ecu in this particular model is known to create problems in the gearbox....

take it to a reputable technician that can diagnose and tell u exactly what to buy.

if it were me sha, I'd scout places looking for where I can get that matching ecu first and test run it in the vehicle without buying it.... if it works then fine... if it doesn't I'll return it and pay testing fee.

My concern is that I don't want unknown people to dabble into the vehicle. Every technician you see will claim to be a professional (just like some guy who said I need not service the transmission with T-IV).

I tried getting a new ECU last Saturday but to no avail. Perhaps I need to extend my network to get the correct ECU earlier advised. Thanks.

kayphyzee:


My concern is that I don't want unknown people to dabble into the vehicle. Every technician you see will claim to be a professional (just like some guy who said I need not service the transmission with T-IV).

I tried getting a new ECU last Saturday but to no avail. Perhaps I need to extend my network to get the correct ECU earlier advised. Thanks.

cc gazzuzz, autologic, mayor2013

kayphyzee:


Thanks for your feedback. This is the VIN - JTEGH20V410015967.

Please recall I said we changed the Sensor and the tokunbo sensor returned with the same code. Could it be possible that the tokunbo sensor we put is also faulty?

Penny wise pound foolish

radautoworks:


Penny wise pound foolish

And you feel good by this comment? You can do better.

radautoworks:


Penny wise pound foolish

I assume you feel better with your post.

Passing smirking remarks?

kayphyzee:


I assume you feel better with your post.

Passing smirking remarks?

No, being realistic about something I've repeated often. It's not about you.

kayphyzee:


My concern is that I don't want unknown people to dabble into the vehicle. Every technician you see will claim to be a professional (just like some guy who said I need not service the transmission with T-IV).

I tried getting a new ECU last Saturday but to no avail. Perhaps I need to extend my network to get the correct ECU earlier advised. Thanks.

Yup..
Buying the correct ecu would help towards isolating the cause..and this the repair,..chasing too many variables is expensive and confusing

earthrealm:


Yup..
Buying the correct ecu would help towards isolating the cause..and this the repair,..chasing too many variables is expensive and confusing

Good morning and thanks for your feedback. Somehow, all scanning I've done did not bring up any other transmission-related code save for a recent P1725 which was rectified this last Saturday. On my way to work this morning, it still didn't engage the 4th gear. I was in Ladipo on Saturday to look for the ECU, but to no avail.

I reckon my strategy going forward is this - (i). Find a high-end scanner to thoroughly check out the vehicle (hopefully this will give direction on any repairs to the gear system); (ii) procure the ECU with this number - 89661-42563 (will definitely test before paying).

One thing I keep thinking is, even if some component inside the gear system is faulty, fixing the ECU -42563 will not solve the problem. Hence, the reason I concluded to take the steps above. I can then buy the ECU-42563 to forestall a recurence. What do you think?

Y3ah..you know i have always doubted the complete repair of your car... after you posted the nos of the replacement ecu , you bought...at this stage, your gear may have been damaged already/needs replacement.....thus you may likely still need to change the gear after sorting out the ecu....
Thats the nightmare, i wished you could avoid.

First thing is to have the correct ecu i nstalled in you car, then you can try resolving the gear issues, you may be fortunate and a sensor/solenoid swap will repair the issue.

earthrealm:
Y3ah..you know i have always doubted the complete repair of your car... after you posted the nos of the replacement ecu , you bought...at this stage, your gear may have been damaged already/needs replacement.....thus you may likely still need to change the gear after sorting out the ecu....
Thats the nightmare, i wished you could avoid.

First thing is to have the correct ecu i nstalled in you car, then you can try resolving the gear issues, you may be fortunate and a sensor/solenoid swap will repair the issue.

My hopes o.

earthrealm:
Y3ah..you know i have always doubted the complete repair of your car... after you posted the nos of the replacement ecu , you bought...at this stage, your gear may have been damaged already/needs replacement.....thus you may likely still need to change the gear after sorting out the ecu....
Thats the nightmare, i wished you could avoid.

First thing is to have the correct ecu i nstalled in you car, then you can try resolving the gear issues, you may be fortunate and a sensor/solenoid swap will repair the issue.

My hopes o @sensor/soleniod. Thanks for your assistance.

kayphyzee:


My hopes o.

Just bring the car to us to see what's really going on before you do anything else

radautoworks:


Just bring the car to us to see what's really going on before you do anything else

I reckon you service Island clients?

kayphyzee:


I reckon you service Island clients?

Not at all. About half our business comes from the mainland- especially on the weekend

Hello @earthrealm and obekediamondfuto, I am happy to report that my prolong gear issue was resolved today. I am so elated so much that I paid the guy more than we bargained. All along, it had been an electrical wiring problem.

He traced/tested each port on the ECU and wires from the valve body connector for continuity. Did some corrective works etal. Long story short, vehicle entered 4 and 5 o. I entered Lagos/Ibadan for testing and I was more than happy. At 100km/h, my rpm was at 2000 or so. I hit 120 on the long bridge, hit the cruise control button and eased off my leg on the throttle. Baby boy was just sailing.

Overdrive button now functioning. Return trip, I hit the O/D button and I could hear the high pitch from the engine. O/D on again, and I was back to 4 and hit 5 before reaching Berger.

By the way, I serviced with T-IV after the electrical work finished before going for the test-drive.

Thank you so much for your help.

kayphyzee:
Hello @earthrealm and obekediamondfuto, I am happy to report that my prolong gear issue was resolved today. I am so elated so much that I paid the guy more than we bargained. All along, it had been an electrical wiring problem.

He traced/tested each port on the ECU and wires from the valve body connector for continuity. Did some corrective works etal. Long story short, vehicle entered 4 and 5 o. I entered Lagos/Ibadan for testing and I was more than happy. At 100km/h, my rpm was at 2000 or so. I hit 120 on the long bridge, hit the cruise control button and eased off my leg on the throttle. Baby boy was just sailing.

Overdrive button now functioning. Return trip, I hit the O/D button and I could hear the high pitch from the engine. O/D on again, and I was back to 4 and hit 5 before reaching Berger.

By the way, I serviced with T-IV after the electrical work finished before going for the test-drive.

Thank you so much for your help.

Congrats

Asunaky:

Thanks boss

Try a brainbox. .. it's available right here

kayphyzee:
Hello @earthrealm and obekediamondfuto, I am happy to report that my prolong gear issue was resolved today. I am so elated so much that I paid the guy more than we bargained. All along, it had been an electrical wiring problem.

He traced/tested each port on the ECU and wires from the valve body connector for continuity. Did some corrective works etal. Long story short, vehicle entered 4 and 5 o. I entered Lagos/Ibadan for testing and I was more than happy. At 100km/h, my rpm was at 2000 or so. I hit 120 on the long bridge, hit the cruise control button and eased off my leg on the throttle. Baby boy was just sailing.

Overdrive button now functioning. Return trip, I hit the O/D button and I could hear the high pitch from the engine. O/D on again, and I was back to 4 and hit 5 before reaching Berger.

By the way, I serviced with T-IV after the electrical work finished before going for the test-drive.

Thank you so much for your help.

congratulations BRO, so happy to hear this!
at least u can rest a bit now!