I have a Tech 2 and have gone thru the programs and screens and done the basic tests. I am trying to use it (suppose to be able to access/test shocks/actuators) to find out why my shocks are inoperative. Can anyone provide me instructions or a link on where this test is performed in the tech unit. my card is good up to 2013, have scrolled all screen areas but cannot see where/how to test shocks.

I have seen some youtube videos on the tech but nothing in the area I need assistance on. I have NO DTC's set but IP message of shocks inoperative, max speed 80 mph.

thanks in advance

 

Did you check codes with the Tech II or pull the codes on the car? The reason I ask is, some think the Tech II will provide any and or all information you need and that is NOT the case.

 

I Checked the codes first on the IP and then got out the tech 2 since I still had the messages. I was surprised that no DTC's showed in the Tech unit.

at a loss on where the test process is in the tech 2...pcm, bcm, special functions etc all do not give me what is recognized to me to be the test point.

thanks

the service manual talks about soft DTC's which I think of as intermittent issues that do not set codes....however where I would go to look other then the plug connections is mystery to me at this time.

 

What year is your car? You just get it or had it a while? This just started happening out of the blue?
Plug connections would be a good place to start...

 

Strange, with the MPH limit you should have a DTC. I have a list of the paths for the Tech 2 I can share later, not at home now.


Mr. Sam

 

Mr. Sam, thanks for the comment. any help when you can would be appreciated. the car is a 97 coupe, 187k on miles, had it 13 yrs. and this message has been occurring past 90 days. don't drive it but in nice weather so have put up with the message but now want to correct it.

I don't just change out parts so want to do the proper diagnostics. I understand the shocks MAY need replacement due to age but will address that IF that is the only issue. Rides fine other than the message/shocks.

if there exist a laymans list of troubleshoot tests/resistances/etc that would be helpful.

 

Did you select the "RTD Special Functions" from the Tech 2 menu? That should get you to where you can turn the shocks ON or OFF and see what's working or not. If the Tech 2 is not communicating with the ESC, then you may not see any codes specific to the RTD system.

Did you see any U1000 thru U1305 codes? These codes would indicate data link communication problems.

You really need the FSM manuals for your car year. There are all sorts of troubleshooting steps to check the RTD system and to check any problems with how a Tech 2 is (or isn't) talking to the car.

 

Ok now that they know it's the F45... and a little back ground... I'll just watch and learn...this will get over my pay grade pretty quick...

 

This may help narrow things down

Shock Solenoid Test Path

Chassis > RTD > Special Functions

 

C4Crusier & Last C5

I have had the 3 FSM manuals along with car but just recently obtained a TECH 2. I have read the section on the shocks in the FSM. Looking to have the Tech 2 capabilities identify what the issue is since I do not get any codes, either thru the IP manually or thru the Tech 2.

saw the special functions and tried it but not seeing anything happen. Tomorrows another day and will put the car up on jack stands and check all the connections underneath, wheel sensers, harnesses etc.

no U1000 thru U1305 codes

thanks all for the support

 

You will find this link very helpful. Look at Shock and you will find what you want. Have not tried to see if the sensors have a test. I can look later if you can't find anything.

https://www.corvetteforum.com/forums...101-paths.html


Mr. Sam

 

Thanks, will reviw and get back later. Have used lots of Bills suggestions, never saw this link of his.

 

ok, car up on stands but decided to give the Tech 2 another try, no communication with 97.

went to the 94 and connected the Tech 2 and had communication and access to screens.

SO, anyone give me directions as to why/how to determine the NO Comm issue. I did not find a fuse for Comm Link. Where should I start.

Where to start....I will finish checking out all the connections this morning and then look at the FSM wiring for any communication link info.

Any shortcuts to resolving this issue or directions is appreciated.

Anyone help on trouble shooting the DLC since I do not communicate with my 97 vet....94 vet does so I know its not the Tech 2.
Pin 2, Pins 4 & 5, and pin 16 I understand are the main ones.....what values or readings should show up on probing them and what to use....ohm meter or voltmeter ???.

also, is there a way to verify the dlc wires are solid to the (pcm or bcm )device its getting its info from.

thanks still working the connections under the car.

 

I can get you the info later from home. The Tech 2 takes the serial bus signal from the OBD connection at the dash. That can also provide power and ground or you can use the adapter to plug in the lighter.

The OBD connector just has one Purple wire fed from the 2 Star connectors as shown here.





Mr. Sam

 

OK, NO power to pin 16 on dlc....cannot find any fuse listing for it but its suppose to be 12 volt hot all the time.

PINS 4 & 5 show continuity to ground and to each other.

WHAT should pin 2 show....anything at all with the ohm meter/continuity/+- some volts ???

can anyone point me to its source. thanks tom

 

oK, now have power to the DLC, tech 2 powers up but when I try to get communication it fales, tells me to check connection (on/off)

out of effort for today. any suggestions for tomorrow would be appreciated. spent most of the afternoon tracing out the power to the DLC and now that its there another issue....communication.

I have power now to the DLC BUT still get the no communication message, I have to finish checking the connections under the car tomorrow and put it back on the ground. is there a way to view the PIN 2 output/voltage or whatever it puts out with a volt meter to see if anything is available at the pin. I know the Tech 2 works on my 94, I verified that so now that the power is available to the DLC my next step would be to see what pin 2 is doing, if anything. if nothing is available at pin 2 then I would need to trace that line back to the PCM or BCM and verify the line is good. I have not checked out that part and won't until the weekend but need to put it into shape again to drive as other than the 80 mph limitation and shock error it ran fine. if you have any info on where I could tap in a probe to pin 2 and tap it at the appropriate pin on the pcm or bcm it would help in either seeing if the communication functions or if I ohm out the pin 2 to ???? pin on the computer.

enough for tonight, I'm sore and tired. Thanks tom

 

The DLC wires I have are....pin 2 purple, pin 4 black, pin 5 blk/wht, pin 9 lt. tan, pin 14 drk green, pin 16 orange

so where do I find the other end of the pin 2 purple wire on the PCM or BCM. is the pin 2 purple I have the same one you circled in the image only from a different year or is the pin 24 the one you circled

 

Here is a graphic of your 97 OBDII port. This should help you trace the wires down.

 

Thanks for the schematic...any idea on the opposite end of the purple wire where it terminates...pcm or bcm

will address it tomorrow.

 

Found the wire. Goes to the BCM. Check the top right of the schematic. DLC PPL pin 2. The box to the right that says Data Link Connector Cell 50 is the other schematic I sent prior.

S206 LOCATION: Instrument panel harness, approximately 7.5 cm (3.0 in) from radio amplifier C2 connector (CKT 1489)