Whats required to run Diagnostics on a Toyota

deckie27

Hi

I just bought a Rav4 not from a main dealer
Its driving and running perfectlly
I'd like to check it for any faults before my "warranty" runs out

So Whats required to run Diagnostics on a Toyota RAV4?

Thanks

Feelgood

Laptop, OBD (Onboard Diagnostics) connection cable and OBD software for Toyotas...

All 3 available on Ebay.....

craichoe

deckie27 wrote: »

Hi

I just bought a Rav4 not from a main dealer
Its driving and running perfectlly
I'd like to check it for any faults before my "warranty" runs out

So Whats required to run Diagnostics on a Toyota RAV4?

Thanks

Diagnostics won't really tell you anything, their only an aid to diagnose a problem. For example, if you noticed there was a lack of power or you were using a lot of fuel then the diagnostic would be an AID, but its never a way for checking for a fault with no symptoms.

deckie27

Ok

I've being researching and found these
http://cgi.ebay.ie/U480-CAN-Bus-OBDII-OBD2-EOBD-Trouble-Code-Read-Scanner_W0QQitemZ260230103384QQihZ016QQcategoryZ30921QQssPageNameZWDVWQQrdZ1QQcmdZViewItem


When trying to get a cable to plug into a laptop there seems to be mention of VAG cables none mention toyota
Will any cable suit a toyota? the rav4 is a diesel 2004

software seems easily available

I would prefer a laptop based solution as i would hope to be able to do more (maybe)

craichoe wrote: »

Diagnostics won't really tell you anything, their only an aid to diagnose a problem. For example, if you noticed there was a lack of power or you were using a lot of fuel then the diagnostic would be an AID, but its never a way for checking for a fault with no symptoms.

I had a skoda last year which was perfect bar a central locking problem, when I ran diagnostics on it showed a lock motor problem but also a lamba sensor that was failing interminently and a heated mirror issue neither of which I was aware of

Feelgood

You have to get the specific cable for Toyota, they are all different. (Use a different amount of pins). I will have a check for you.

The software that you can pick up online also allows you to run ECU remaps, turn off services lights etc etc. Its pretty cool when you get into it, though most of the cables need to connect to the laptop via a Serial port. Most new laptops don't have serial ports unfortunately, so its the one occasion where the older the laptop the better!. You can however get a serial port to USB convertor to allow you to connect to a newer laptop..

Most of the OBD software is donkeys years old too (DOS based) so it runs better on Windows 95, 98 and 2K.

craichoe

deckie27 wrote: »

Ok

I've being researching and found these
http://cgi.ebay.ie/U480-CAN-Bus-OBDII-OBD2-EOBD-Trouble-Code-Read-Scanner_W0QQitemZ260230103384QQihZ016QQcategoryZ30921QQssPageNameZWDVWQQrdZ1QQcmdZViewItem


When trying to get a cable to plug into a laptop there seems to be mention of VAG cables none mention toyota
Will any cable suit a toyota? the rav4 is a diesel 2004

software seems easily available

I would prefer a laptop based solution as i would hope to be able to do more (maybe)






I had a skoda last year which was perfect bar a central locking problem, when I ran diagnostics on it showed a lock motor problem but also a lamba sensor that was failing interminently and a heated mirror issue neither of which I was aware of

Yeah, Vag-Com .. error codes you would have recieved would have been

Implausable reading Lambda sensor
and probably
Central Convenience unit

Both can be false positives .. no point in replacing a part based on a ODB diagnostic, its only an aid to help pin down an issue. If you get an error code on your ECU, you will go to the dealer, they will check it, see the error code, clear the log and send you on your happy way.

FredsWebHead

Hi,
I got a Lexus '01 and got this

http://cgi.ebay.co.uk/ELM323-Scantool-Scanner-Diagnostic-Interface-USB-OBD2_W0QQitemZ160232600178QQihZ006QQcategoryZ30921QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

Downloaded free software from the internet and connected up the laptop to the car. Sure enough it had a fault. Cleared it to see if it would come back again. Plus I needed to research it. Fault came back again and each time the MIL light did not a appear. Found that intermittent fault do not show up MIL light. Found out that the fault was due to the MAF sensor or air flow flow sensor. Read up a bit more and found out how to clean and works fine ever since.
What year is the RAV4 is it diesel, cause OBD was not standard on diesel cars untill 2003. Petrol 2001. Toyota porocols are ISO9141. All car should be on the CAN porocol by this year. So don't pay too much.

Word of Warning. "if your going to REMAP an ECU expect to pay e900 for a new one if it gose wrong."

Bike,
Fred.

FredsWebHead

Sorry just seen its a RAV4 04, Should be ok to read, but check under the bonnet there should be a plate with all the OBDII code info there for you.

Tree House,
Fred.

FredsWebHead

deckie27 wrote: »

Ok

I've being researching and found these
http://cgi.ebay.ie/U480-CAN-Bus-OBDII-OBD2-EOBD-Trouble-Code-Read-Scanner_W0QQitemZ260230103384QQihZ016QQcategoryZ30921QQssPageNameZWDVWQQrdZ1QQcmdZViewItem


When trying to get a cable to plug into a laptop there seems to be mention of VAG cables none mention toyota
Will any cable suit a toyota? the rav4 is a diesel 2004

software seems easily available

I would prefer a laptop based solution as i would hope to be able to do more (maybe)






I had a skoda last year which was perfect bar a central locking problem, when I ran diagnostics on it showed a lock motor problem but also a lamba sensor that was failing interminently and a heated mirror issue neither of which I was aware of

Hi again. That Reader is a VAG-COM reader and its for The VolkswagenAudiGroup. no go for Toyotas.

Lemon
Fred

craichoe

FredsWebHead wrote: »

Hi again. That Reader is a VAG-COM reader and its for The VolkswagenAudiGroup. no go for Toyotas.

Lemon
Fred

Vag-Com is a piece of software, this is just a ODB-II reader.
That thing is nothing to do with Vag-COM what so ever

deckie27

FredsWebHead wrote: »

Word of Warning. "if your going to REMAP an ECU expect to pay e900 for a new one if it gose wrong."

Bike,
Fred.

Great advice
I have no intention of remappping the ECU.. I just want to have a look
I'll have a look at for the iso info later


To be honest i don't want to have to pay a garage to change the oil and filters

Avns1s

deckie27 wrote: »

Great advice
I have no intention of remappping the ECU.. I just want to have a look
I'll have a look at for the iso info later


To be honest i don't want to have to pay a garage to change the oil and filters

You don't need a diagnostic code reader to change the oil:rolleyes:

Anyway, Toyotas since 2001 (i think) use OBDII

I use an ELM 323 interface and scantool software on a laptop and it works fine for recent toyotas and other cars too.

Generally, unless your engine management light is on, there's not a lot of point in using a code reader.

deckie27

OVER A YEAR LATER

OK i never bought anything to read the codes

Now I need to have engine management light on.

Its a Toyota RAV4 2004 diesel

Will this do the job? http://cgi.ebay.com/ebaymotors/ELM323-Interface-with-MCU_W0QQcmdZViewItemQQ_trksidZp3286Q2em63Q2el1177QQhashZitem190307949629QQitemZ190307949629QQptZMotorsQ5fAutomotiveQ5fTools?

Whats the MCU option to buy with or without?


For people who are wondering .
This morning when I got a bigish road and put the boot down It kinda hit a wall around 3000 rpm
the turbo wasn't really kicking in sometimes it would?
later in the day the engine management light came on


Thanks

cena

can't you get some thing like that in argos. didn't know if it is good

colm_mcm

It's not in the garages interest to not check it for you, the warranty is backed by Toyota, so even if there was a fault, it wouldn't be coming out of the garages pocket.

Scan won't exactly tell you much, and if there's no ECU light or Check 4X4 system message coming on, there is unlikely to be a problem.

beam99

Why not just bring it to a main toyota dealer and get them to check it over approx 1 hour labour, some of them gave trouble with injectors and suction control valves, and you need to look at the live data readings when the engine is running, a standard obd code reader will not give you that info.

deckie27

beam99 wrote: »

Why not just bring it to a main toyota dealer and get them to check it over approx 1 hour labour, some of them gave trouble with injectors and suction control valves, and you need to look at the live data readings when the engine is running, a standard obd code reader will not give you that info.

I bought it to a garage this evening
It had 3 errors on it. 2 relating to the MAF Air intake sensor but i had it off earlier with the engine running.
It was reading 50oC while ticking over with an outside temp of 13oC which seemed high.
But I have the sensor beside me not and its resistance is within limits

Also it brought up P0627 Open or shut suction control
These are the valves on the fuel pump - I believe ?
I'm thinking of trying these valve forst any tips on where to get them for a good price?

Thanks

colm_mcm

Isn't your car under warranty

deckie27

colm_mcm wrote: »

Isn't your car under warranty

No Sorry
Maybe I confused people by adding to a message i put up over a year ago. Sorry