High transmission fluid warning light

[slprciv]

Going through the mountains and switchbacks at Bishop I upgraded to a Derale tranny cooler. Best thing I ever did for the transmission. Temps never saw more the 195 degrees in ambient temperatures of mid 90s. Seeing the temps steady in my Scanguage prove the money spent was worth it.

The transmission cooler:

 

[slprciv]

Before I had this i had to keep it in 4L to keep the temps down.

My setup:

 

[bglfgd]

Probably not the worst idea to change that cooked fluid sooner than later.

Sent from my SM-G973U using Tapatalk

 

[alirawk]

Once again — this forum does not disappoint. Thank you all so much for your kind insights.

 

[1000MPH]

The general consensus has been that there is no oil temp or oil pressure sensor, for that matter, in the 4R…at least no sensor that can deliver data to the OBDII. Is this incorrect?

 

[Hammer0313]

The general consensus has been that there is no oil temp or oil pressure sensor, for that matter, in the 4R…at least no sensor that can deliver data to the OBDII. Is this incorrect?

I’m getting a good reading on oil temps with the unit I use. Not sure the location of the sensor but I assume it’s post oil cooler.

 

[DougR]

I’m getting a good reading on oil temps with the unit I use. Not sure the location of the sensor but I assume it’s post oil cooler.

I can not find a 5th generation engine oil temperature sensor. I searched on Camelback Toyota using the terms "temperature sensor" and "engine oil temperature sensor". I also searched with Google "5th generation 4runner engine oil temperature sensor" and didn't find anything.

Your OBDLink MX+ is showing engine oil temperature 177.8 F which is too low if the engine is fully warmed up. Oil temperature leaving the engine and entering a cooler should be above 212, ideally 220-230 F to evaporate condensation in the crankcase. Your oil temperature is also less than coolant temperature, 186.8 F, which doesn't make sense if this is oil temperature exiting an oil/coolant heat exchanger. Why would Toyota measure coolant or oil temperature at the exit of a radiator or heat exchanger? When a technician wants to perform diagnostics, isn't it better to measure coolant and oil temperature exiting the engine block?

Have you observed an engine oil temperature reading in the 220 to 230 F range?

 

[mike5]

Allow me to clarify. If you're driving 25MPH or higher speeds, then yes 4H makes sense. In that case if you leave it to the car, you'll be in 4th gear...causing higher transmission temps. In that case keep it in 3.

 

[Kamalani Mahie]

Great stuff here. Thanks.

Will look into scangauge. You have any recommendations?

No problem. There are many OBDII devices out there that will give you lots of vehicle information so I definitely recommend looking at a bunch and deciding what's best for you. I chose the Scangauge II because it's been around forever, reliable, and great customer service. It's a dinosaur but so is the 4runner lol. I like that.

 

[DougR]

Great stuff here. Thanks. Will look into scangauge. You have any recommendations?

I bought OBDLink MX+. It took awhile to set up 4 dashboards that gives me continuous real time data on my iPhone 8+ to the following parameters: 2 transmission fluid temps, coolant temp, battery voltage, 4 catalyst temps, 2 oxygen sensor voltages, 2 long term fuel trims, 2 short term fuel trims, total number of DTCs, number of emission related DTCs, total number of all cylinders misfire count, number of trouble codes, evaporator fin thermistor temp, and 4 tire pressures.

I have scanned for DTCs and none were found. I haven't tried the data log, monitor or mapping features. I will load OBDLink software on my laptop when the weather is cooler.

When launching the app, one has to select a connection to a particular system, such as Network A (engine, steering, airbag, a/c, driveline, etc), Tire Pres Monitor, Network F (vehicle body), Telematics, Immobiliser, and Occupant Detection. I haven't tried using the last 4 features. Note, each network is separate, therefore, when looking at tire pressures, one cannot simultaneously view engine data because each network has a different control unit.

Overall, I like how the information is displayed and I wanted something easy to use. BlueDriver is another one to consider. Google search BlueDriver vs OBDLink MX+.

 

[Dzldust]

Love my Scangauge,this was pulling my camper ,flat ground

 

[Hammer0313]

I can not find a 5th generation engine oil temperature sensor. I searched on Camelback Toyota using the terms "temperature sensor" and "engine oil temperature sensor". I also searched with Google "5th generation 4runner engine oil temperature sensor" and didn't find anything.

Your OBDLink MX+ is showing engine oil temperature 177.8 F which is too low if the engine is fully warmed up. Oil temperature leaving the engine and entering a cooler should be above 212, ideally 220-230 F to evaporate condensation in the crankcase. Your oil temperature is also less than coolant temperature, 186.8 F, which doesn't make sense if this is oil temperature exiting an oil/coolant heat exchanger. Why would Toyota measure coolant or oil temperature at the exit of a radiator or heat exchanger? When a technician wants to perform diagnostics, isn't it better to measure coolant and oil temperature exiting the engine block?

Have you observed an engine oil temperature reading in the 220 to 230 F range?

Only time I seen my oil temps get up in the 220-230’s is in the Rocky Mountains.
I know this little scanner isn’t the perfect fit for everyone’s application but it fit the bill for me. As for how or why the oil temps are the way they are I don’t know, all I know is when I cross reference the oil temps on the scanner with a thermal gun reading the oil pan it’s within an acceptable range for me.
The transmission pan temps are Spot On between the scanner and the thermal gun, the engine oil pan temps can be up to 5-20 degrees hotter than the scanner. But that’s still good info because it gives me a range.
Below are two pics from tonight.

 

[TRD PANTHER]

Does this one do individual tire PSI display also? Is this the one I should get and is this a fair price? TIA
Amazon.com: ScanGauge - SG2 II Ultra Compact 3-in-1 Automotive Computer with Customizable Real-Time Fuel Economy Digital Gauges , Black , 5 Inch: Automotive

 

[ahtoxa11]

With high daytime temps and a steep hill, maybe 4L would be better.

Yep, that's the correct approach. If it requires 4HI and there's a long sustained climb or even a short and steep climb, 4LO is what should be used. Here in CO it's not uncommon to overheat the trans in 4HI offroading.

 

[ahtoxa11]

This reminds me to pull out my Scangauge. It's been buried at the bottom of my center console unused since 2 years ago when I sold the Ecoboost F150.

 

[1000MPH]

Yup.

ScanGauge Codes

Transmission Temperature (Pan) - 07E02182 046105820000 2808 00090005FFD8 TFT

Transmission Temperature (Torque Convertor) - 07E02182 046105820000 3808 00090005FFD8 TCT

TPMS:

TP1 (PSI) 822AF02138 546180004000 2808 001D0008FF6F TP1
TP2 (PSI) 822AF02138 546180004000 3008 001D0008FF6F TP2
TP3 (PSI) 822AF02138 546180004000 3808 001D0008FF6F TP3
TP4 (PSI) 822AF02138 546180004000 4008 001D0008FF6F TP4

Does this one do individual tire PSI display also? Is this the one I should get and is this a fair price? TIA
Amazon.com: ScanGauge - SG2 II Ultra Compact 3-in-1 Automotive Computer with Customizable Real-Time Fuel Economy Digital Gauges , Black , 5 Inch: Automotive

 

[1000MPH]

Only time I seen my oil temps get up in the 220-230’s is in the Rocky Mountains.
I know this little scanner isn’t the perfect fit for everyone’s application but it fit the bill for me. As for how or why the oil temps are the way they are I don’t know, all I know is when I cross reference the oil temps on the scanner with a thermal gun reading the oil pan it’s within an acceptable range for me.
The transmission pan temps are Spot On between the scanner and the thermal gun, the engine oil pan temps can be up to 5-20 degrees hotter than the scanner. But that’s still good info because it gives me a range.
Below are two pics from tonight.

I did find a post but now I can’t remember where that said ScanGauge posted an oil temp code but then deleted it.
Edit: found the post. Unfortunately the person who posted it hasn’t been active here in awhile.
https://www.toyota-4runner.org/3rd-gen-t4rs/95258-scan-gauge-ii-codes-new-stuff-4.html#post2948460

 

[TRD PANTHER]

Yup.

ScanGauge Codes

Transmission Temperature (Pan) - 07E02182 046105820000 2808 00090005FFD8 TFT

Transmission Temperature (Torque Convertor) - 07E02182 046105820000 3808 00090005FFD8 TCT

TPMS:

TP1 (PSI) 822AF02138 546180004000 2808 001D0008FF6F TP1
TP2 (PSI) 822AF02138 546180004000 3008 001D0008FF6F TP2
TP3 (PSI) 822AF02138 546180004000 3808 001D0008FF6F TP3
TP4 (PSI) 822AF02138 546180004000 4008 001D0008FF6F TP4

Great. Thank you

 

[DougR]

I did find a post but now I can’t remember where that said ScanGauge posted an oil temp code but then deleted it.
Edit: found the post. Unfortunately the person who posted it hasn’t been active here in awhile.
https://www.toyota-4runner.org/3rd-gen-t4rs/95258-scan-gauge-ii-codes-new-stuff-4.html#post2948460

The post you're referring to is number 123 on page 9 of that thread. Travelin wrote, "I have a new 2018 TRD Off Road Premium factory stock and a new ScanGuage II. I programmed X-Guages for trans temp and engine oil temp. The trans temps and the built-in coolant temp read as expected. However I'm puzzled by the engine oil temp reading. I programmed the codes I found on the ScanGuage website as follows:

(ScanGuage has removed the codes for 4Runner engine oil temp, so I have deleted the link. They said although the codes I found are correct and work, they were posted inadvertently and have not yet been publicly released. )

After driving for about an hour at highway speeds the engine oil temp reading on the ScanGuage tracks almost perfectly the transmission fluid temperatures (160 to 170 degrees F). I expected the EOT to be substantially higher."

 

[NotaTRD]

This is the scan tool I use and I love it, plugs in under the dash and then connects to your phone via Bluetooth. There’s probably 100 different gauges to choose from but these are the ones that I use.
I was out west in March and this thing is a life saver; climbing trails you can get all your temps at a glance.

I’ve been looking for something like this. Thank you