Diagnostic Trouble Code (DTC) Reading

[jkdv8]

So I thought would post this in hope of helping some of you out. There is a recent post that touches on reading diagnostic trouble codes (DTC) with a scan tool. There are also quite a few others than discuss the subject.

msport97.proboards.com/thread/11228/malfunction-indicator-light-display-reliability?page=2

This information is based on the U.S. Spec Montero Sports but I'm sure it will be the same with other regions. You should however double check before performing this if you live outside the U.S.

If you do not have an obd scanner you can still pull codes however. First thing is to have the ignition in the off position. Then on the 16-pin obd port jump pin one to ground. Turn the key to on with or with starting the engine. The system readiness light for the system in question should begin flashing you two digit fault codes. There will be a pause then the light will flash giving you the first number followed by a pause then followed by the second number. If there are multiple codes there will be a pause in between each. The second number also flashes in faster increments than the first to differentiate the two.

You need to use caution and pay attention to the orientation of your OBD connector as mine is upside down.

This can come in handy because I have yet to come across a scan tool (other than the Mitsubishi specific MUT II/III) that can scan codes from other systems. Below are the codes that pertain to each individual system. I am still however working on the SES codes. Some say it will show the older, less detailed OBD1 version 2 digit codes while others say it will display the generic P0*** as well as the manufacturer specific P1*** OBD2 codes. If anyone has a Service Engine Soon (SES) light and would like to verify that would be great. If not, at my earliest opportunity I will unplug a sensor and force a code to see what happens.

Anti-Lock codes (ABS)



Airbag codes (SRS)



Transmission codes (A/T Temp or "N")

[jkdv8]

As for the OBD connector itself the pin numbers, as far as I know, are universal however, the function may vary by year, make, model, and OBD protocol.

[jkdv8]

Here is mine for example. As you can see I have a 27 (not sure why) for the trans and 21-27 for the ABS. ABS is 4wd related.



www.ustream.tv/recorded/85526168

[jkdv8]

Ok so for the (SES) engine codes I'm under the impression that this method will only display the two digit fault code (OBDl) which are far less specific than the OBDll codes. I haven't tested the theory yet but, this is more than likely going to be the case so, given that I would recommend purchasing an OBD scanner so you're able to read the more detailed codes. It also helps in narrowing down where to start.

The purpose of these codes are to help point you in the right direction and are not to be taken literally as the component causing the failure or issue could be something else altogether. For example, all 7 ABS codes on mine were triggered by the 4wd system and not the ABS. It is also worth noting that depending on the vehicle, some go into more detail than others but, that is another can of worms altogether. These trucks however are not overly complex in nature thus the codes are rather generic. It is also advisable to purchase the service manual for system locations, testing procedures, possible causes, as well as overall general knowledge of the vehicle. Also, the app based OBD scanners are cool and convenient but, they do not offer all the features that computer based software tools do so take that into consideration as well.

Here are some of the Mitsubishi OBDl codes:



As for OBDll there are quite a few lol. Here is the description of the OBDll DTCs:



OBDll P0*** codes for these trucks:



Full list can be found here: OBDll Generic/Manufacturer Specific Code List

[jkdv8]

I haven't come across anything that leads me to believe these pertain to these trucks (besides a few transmission codes) but here are some others:

P1*** codes:



U1*** codes:

[jkdv8]

Well that is a negative on the SES light code flash. I had my doubts but had high hopes. However, the cruise control can be added to this list but the procedure is a little different.

[jkdv8]

For the Cruise Control you hold down (Coast/Set) while switching the ignition to ON then, immediately push the switch in the up (ACC/Resume) position.

Cruise Control codes: