Land Cruiser 200 cold start idle issue

[MJB]

Hello, I have a weird issue with my 2008 4.5 V8 diesel 200 series I have searched the entire internet and asked toyota techs and no one seems to have an answer so want to see If any of you guys ever heard of this issue.

The issue:
When standing overnight when started for the first time it will start but at very low RPM it will not rev up automatically so this causes the starter to run longer because it needs to reach a certain RPM to cancel the starting action.
It starts very quickly no diesel issues, injectors are fine, starter is working perfectly. No weird smoke.
The problem seems to be it does not rev up on cold starts, I tested this theory by reving it immediately after it started and seems to work to cancel the starter. After it started it just idles at normal low Idle speed as if the motor is warmed up. The pwr heater button is also not working to make the engine idle higher.
I scanned for fault codes with techstream and other OBD 2 scanners and no fault codes. I checked the pwr heater fuses all are working so I do not understand why this car does not want to idle higher when its freezing outside. I also cleaned the maf sensor and replaced the MAP sensor filter. I am seeing on techstream while the engine is off but ign on that the map sensor is reading 87Kpa and at idle it is at 86kpa can it be that the MAP sensor is bad ?

Any advice would be highly appreciated, thanks

 

[Brett]

I don't think the power heater will engage unless ambient temperature is less than 10 degrees celcius. Sorry, no idea on why revs are low, what do you mean by low, they usually tick over about 600rpm?

 

[MJB]

I don't think the power heater will engage unless ambient temperature is less than 10 degrees celcius. Sorry, no idea on why revs are low, what do you mean by low, they usually tick over about 600rpm?

Hi Brett, thanks for the reply yes the revs are sitting at 600rpm when it is up and running with AC off. I have a newer model a 2014 VX200 same engine and when it cold starts it revs up for a few seconds and then as soon as you engage gear it comes down to normal revs. This 2008 one just seems to not do that and it struggles because of it on that first start. I see there are some other people with the same issue but they also don’t have a solution some of the guys changed the starter but it still does the same thing the car starts but the starter keeps running because the revs are too low to cancel the start sequence and it does not rev up as it supposed to.
It’s also only on cold starts afterwards it’s normal for the rest of the day and starts very quickly like a new VX200.
I will see if I can upload a video of what it does this is such a weird problem but I believe it may be a sensor on its way out somewhere I just wish it would throw a error code so that I can know which one.

The PWR heater works on the 2014 until the vehicle is up to temp then it turns off

 

[MJB]

Hi

So I did some heavy digging this weekend on the internet apparently this is a issue with the ECU some VX200’s stop idling up and some idle higher than normal. Also seems Toyota is keeping it a hidden failure as per a toyota technician who worked on another guys 200 series which had issues of it idling too high.
The normal way this vehicle should act is it should idle up for the first 5 seconds after it has started and then go down to 600rpm(without ac on).

I also made the discovery the issue started with the first generation LC200’s so many people think its their starter that’s acting up meanwhile its the ECU.

These are just my findings and I can be proven wrong and just wanted to post it here as it may help someone with the same issue.

 

[Brett]

Hi

So I did some heavy digging this weekend on the internet apparently this is a issue with the ECU some VX200’s stop idling up and some idle higher than normal. Also seems Toyota is keeping it a hidden failure as per a toyota technician who worked on another guys 200 series which had issues of it idling too high.
The normal way this vehicle should act is it should idle up for the first 5 seconds after it has started and then go down to 600rpm(without ac on).

I also made the discovery the issue started with the first generation LC200’s so many people think its their starter that’s acting up meanwhile its the ECU.

These are just my findings and I can be proven wrong and just wanted to post it here as it may help someone with the same issue.

Is there a solution? Can they reflash the ECU or a hardware issue meaning replacement?

 

[MJB]

Is there a solution? Can they reflash the ECU or a hardware issue meaning replacement?

Hi Brett still have not found a solution just using the car as is.