[daynick456]

Please delete if this is a repeat post.

10 days ago my wife backed into a car with her 13 Sienna. Minor back left side fender damage. 5 days ago we had the windshield replaced. 2 days ago a warning ABS Brake take to dealer displayed. Today, the steering wheel was stiff, the speedometer stopped working. The shop pulled codes and there was around 10 codes. I called service manager he said maybe related to accident or a rodent. Something about a cluster and wires. Schedule for Friday with a master technician but a little tight on funds. Could anyone please offer a little guidance?

2013 Toyota Sienna 3.5L V6 MFI (2GR-FE)

Heating & Air Conditioning - HVAC History Codes - Codes: 2
U0100 Communication Malfunction (engine ECU)
U0101 Lost Communication With TCM

Instrtrument Panel Cluster - Current Codes - Codes: 1
U0129 Lost Communication With Brake System Control Module

Body Control Module - History Codes - Codes: 3
U0100 Lost Communication with ECM / PCM “A” or EV ECU
U0101 Lost Communication with TCM
U0151 Lost Communication With Restraints Control Module

Engine History Codes - Codes: 1
P1604 Start Ability Malfunction

 

[daynick456]

Could this possibly be a ground wire issue with the BCM? Not sure where it's located on this van, but a broken wire can wreak havoc on everything in these newer vehicles. Might at least have a peak @ where the body damage is and work back to the BCM. Just a thought.

Thank you. I guess it could I am not mechanical so I really don't have an opinion. However, I have a friend that is a mechanic so I can have him take a look. Appreciate it. : )

 

[daynick456]

I found this: your car’s primary control system is governed by the body control module. It may not control the steering... the steering is real affected. So maybe not this but who know and do appreciate the idea and feedback.

 

[daynick456]

Thank you. I guess it could I am not mechanical so I really don't have an opinion. However, I have a friend that is a mechanic so I can have him take a look. Appreciate it. : )

Could this possibly be a ground wire issue with the BCM? Not sure where it's located on this van, but a broken wire can wreak havoc on everything in these newer vehicles. Might at least have a peak @ where the body damage is and work back to the BCM. Just a thought.

I think I found the identical issue and some folks were spending a lot of money:

Warning lights all on, tach and speedo bouncing, power steering hard Discussion Starter · #1 · Mar 30, 2020

 

[daynick456]

If you already have an appointment with a tech friday no point in guessing what any of it could be is my suggestion. Just wait till they look at it and go from there.

Good question thank you. I think because I have read that some folks have paid a lot for searching and I thought if I could add information it might be found more effectively. Today for a minute the entire system went back to normal. I think something is just loose!

 

[daynick456]

Please delete if this is a repeat post.

10 days ago my wife backed into a car with her 13 Sienna. Minor back left side fender damage. 5 days ago we had the windshield replaced. 2 days ago a warning ABS Brake take to dealer displayed. Today, the steering wheel was stiff, the speedometer stopped working. The shop pulled codes and there was around 10 codes. I called service manager he said maybe related to accident or a rodent. Something about a cluster and wires. Schedule for Friday with a master technician but a little tight on funds. Could anyone please offer a little guidance?

2013 Toyota Sienna 3.5L V6 MFI (2GR-FE)

Heating & Air Conditioning - HVAC History Codes - Codes: 2
U0100 Communication Malfunction (engine ECU)
U0101 Lost Communication With TCM

Instrtrument Panel Cluster - Current Codes - Codes: 1
U0129 Lost Communication With Brake System Control Module

Body Control Module - History Codes - Codes: 3
U0100 Lost Communication with ECM / PCM “A” or EV ECU
U0101 Lost Communication with TCM
U0151 Lost Communication With Restraints Control Module

Engine History Codes - Codes: 1
P1604 Start Ability Malfunction

At Toyota now. Yesterday codes were coming and going. I ran heater this morning and codes kicked off for 5 minutes. The check in guy at Toyota checked codes and his reader said none. Weird all the way around.

 

[daynick456]

Therbi's got a point. If you have an appt, might as well see what they have to say. Either way, let us know how it turns out and good luck!

I know I’m just low on funds and trying to avoid the dealership.

 

[daynick456]

Weird. Even if the light goes off usually those codes are still stored in the vehicle. Did they do anything to look around and check for damaged wiring or anything like that or give you any suggestions as to what the problem might be?

No. They took me and my son home and then I got a text that said my van does not want to talk to the computer can I leave it for awhile. Thank you for helping.

 

[daynick456]

Well maybe that isnt necessarily a bad thing. If theres no communication maybe they can start trouble shooting as to why.
Keep us posted.

I just talked with service manager. He says he needs to see what is behind the codes. And he can't do that right now. That I have to leave the van over the weekend. That his master technician checked the fuses and now has to check all the connections one at a time. This is exactly what i was afraid of. I just hope it relates to the rear end collision which is under insurance.

 

[daynick456]

Please delete if this is a repeat post.

10 days ago my wife backed into a car with her 13 Sienna. Minor back left side fender damage. 5 days ago we had the windshield replaced. 2 days ago a warning ABS Brake take to dealer displayed. Today, the steering wheel was stiff, the speedometer stopped working. The shop pulled codes and there was around 10 codes. I called service manager he said maybe related to accident or a rodent. Something about a cluster and wires. Schedule for Friday with a master technician but a little tight on funds. Could anyone please offer a little guidance?

2013 Toyota Sienna 3.5L V6 MFI (2GR-FE)

Heating & Air Conditioning - HVAC History Codes - Codes: 2
U0100 Communication Malfunction (engine ECU)
U0101 Lost Communication With TCM

Instrtrument Panel Cluster - Current Codes - Codes: 1
U0129 Lost Communication With Brake System Control Module

Body Control Module - History Codes - Codes: 3
U0100 Lost Communication with ECM / PCM “A” or EV ECU
U0101 Lost Communication with TCM
U0151 Lost Communication With Restraints Control Module

Engine History Codes - Codes: 1
P1604 Start Ability Malfunction

Update Today

Service Manage called me today he said:

1) Skid control actuator won't function. A new one is 1 thousand.
2) Can’t run tests.
3) Main computer of van says it is communing with systems.
4) Everything else is fine.
5) Can't prove to an insurance adjustor that the rear damage allowing water entry is related to to actuator.
6) I could buy my own actuator they would install but not warantee.

This is why I didn't want to bring it into Toyota.

 

[daynick456]

Spending "good money after bad" but, can you get a body shop (independent) say that the rear damage IS allowing water entry in and wreaking havoc on the actuator? Or, can you replace it yourself with a "used" actuator? I really dislike stealerships and insurance companies are a necessary evil. Ugh!

Great questions. Thank you. I could try. The service manager at Toyota said he could not say that to an adjuster that this moment. He has no proof. The car is involved in an open claim cause my wife backed into a car. We have a $500 deductible. The body work for our van was only $1500. The service manager said he would replace it with one I supplied but that he could not warrant it. What if I go and do that stuff and then at the end of the day it was related to the open claim? Then I would have wished I sat back and wrote checks to Toyota. Tough one. The collision center was approve by Safeco. Toyota is not really involved yet. Or maybe never be. Toyota says I can keep the loaner and take my time. I am trying really hard to make the best choice. A master technician from another local Toyota shop says he thinks that fact that water is getting in through the back gap which was created due to the collision could be the source.

 

[daynick456]

I think I'd politely let Safeco (decent company, btw) know in no uncertain terms that your van had NONE of these problems with the MIL or this actuator before the collision, regardless of whether your wife backed into somebody, lightning struck the car, or whatever. The point is, the vehicle has not worked properly since the collision, and "I'm paying you my hard earned $$ in premiums. This is one of the reasons we carry insurance" is pretty much how I'd word it to them, calmly of course.

I like your thinking. I plan to discuss with my wife tonight. Thank you.

 

[daynick456]

I think I'd politely let Safeco (decent company, btw) know in no uncertain terms that your van had NONE of these problems with the MIL or this actuator before the collision, regardless of whether your wife backed into somebody, lightning struck the car, or whatever. The point is, the vehicle has not worked properly since the collision, and "I'm paying you my hard earned $$ in premiums. This is one of the reasons we carry insurance" is pretty much how I'd word it to them, calmly of course.

Toyota has had the van for 6 weeks. I have not pushed them for an answer. They seem to have run into a problem.

 

[daynick456]

Reading his initial timeline, the vehicle DID work properly after the collision. I get what you're saying, but there's no causality shown here. It could be water damage but no one has shown any kind of likelihood for that. It could be that the windshield installer screwed something up under the hood. It could be a rodent. It could be just random deterioration of something. If I were the insurance company I would want to establish that this was covered damage before I paid.

I repair motorcycles. If I flush someone's brakes and an ABS sensor fails while the bike is in my shop it's awkward but it's not anything I did. Even if I flush the brakes and a hose goes bad or debris clogs the ABS module it's not on me; it's a pre-existing fault rooted in lack of previous maintenance. And if I flush those brakes and a fork seal starts leaking on the test ride, it's completely unrelated.

If I saw communication issues between many different modules, I wouldn't be assuming that replacing a certain module would fix the issue unless the issues all went away when that one module was removed.



Does that mean he can't run tests on the skid module? If the skid control module isn't working because (for instance) it's not receiving steering angle info from the BCM, then it's not a bad skid module. I don't know these particular systems so I can't say.

Thank you for taking the time to respond. I don't know what is going to happen. The issues followed the collision not immediately but very soon. Water did have a place to enter where the collision occurred. And yes the windshield replacement was just before the issues arose. The adjuster said they have seen these issues be related but would need to see a cause. And another service manager said his master technician has seen it before too. Something happened at Toyota. They don't know what to do or can't get a part of something. I have not pushed them for an answer but they have not let me know what the problem was either. The last thing they told me when they first took the van was that they could not run any tests due to a lack of communication.

 

[daynick456]

Yesterday a customer brought a motorcycle in for some brake work. Lever was very soft and he had an ABS light on the dash. I went for a spin, sure enough there's the light, bled the brakes (which resolved the soft lever) and codes showed a bad ABS pump motor. I can fix that in the future for him but not before a trip he's making, so he takes it back. Just called me wondering what the ABS light was about. I explained. He said he'd never seen that before; the light he saw was a pad wear indicator.

So, between him dropping it off and me going for a pre-service test ride, this new problem (which is not unusual for this year) popped up. Nothing I did, nothing he did, nothing anyone can either cause or prevent. But his experience is undeniably that he brought it to me and it developed this new problem.

Thank you for sharing this experience. It raises good points. We have been on vacation so I have been forcing myself not to worry. However, the one real change was that water was allowed to enter the van at the site of collision. And where we live in Port Angeles it rains like crazy in the spring months. And, I did find one almost identical situation where a water issue was the only cause. Not at the rear end and not a collision but water entry from a window being left down. We fly home today. The van is due the following day at the body shop for the rear end repair. I don't even think Toyota has resolved the issue because if they did surely they would have called me. I have to just hope that something works out and I truly hope it ties back to the collision but right now that is uncertain.

 

[daynick456]

After 4 months Toyota found corrosion on a wire under the dash. We had a crack in our windshield in December 2021 but glass companies were out of stock. So we had the windshield replaced shortly after the fender bender and very soon after that we had the code problems. I just read that windshield replacement can lead to leaks. Would anyone care to make a guess on what was more likely the crack (about 2 feet long) or a leak as a result of an improperly installed windshield? How long does corrosion take can it happen in a few days? I just read how to test for leaks so I plan to do that when I get the van back but now I got a bill to look forward to when I collect the van.

 

[daynick456]

I honestly don't know. I found out today that it is DA4 on this diagram.

 

[daynick456]

Hi Ed, thank you for checking back with me. Toyota finally figured it out. They pulled the dash and found a corroded connector. It was DA4 on this wiring instrument panel. They did an overlay as opposed to replacing the entire harness. It cost me $800. Water had to get in there but it sat for 3 months at the dealership in the sun so any water trails were would have been gone. Toyota told me that they don't believe it was due to the crack in the windshield. Thank you for asking Ed.

 

[daynick456]

Be very careful. You're right, most likely not water from a crack but a bad install of the front glass. This is a notorious spot for water to get in and leak down the A pillar. If they already fixed it great, but if they just repaired the connector and did not address why it happened, it will come back again.

I think you are right. We had the windshield replaced in May. However, it was literally a few days after the install that codes went nuts. Then the van sat at Toyota for 3 months during summer. They finally pull the dash and service manager tells me he sees no signs of leakage. After sitting in the heat for three months. I have not felt ok about this since it happened. However. the service manager says there was corrosion. Could it have corroded in a few days? And NO they did not fix or provide a reason why the water got in there. I only paid them 1/2 and asked for a 30 day plan for second half because my gut said something would not work out. I need to sit down tomorrow and write out a specific timeline to double check. Thank you so much.

 

[daynick456]

Be very careful. You're right, most likely not water from a crack but a bad install of the front glass. This is a notorious spot for water to get in and leak down the A pillar. If they already fixed it great, but if they just repaired the connector and did not address why it happened, it will come back again.

Is there a way to test it? If they would have pulled the dash right away they might have seen water trails. I feel really screwed on this.