JohnnoK Posted October 16, 2017 Share Posted October 16, 2017 OK, I officially need serious help now. I am so far out of my depth it's not funny.... I have returned my P38 to airbags using all the bits (except ECU, delay relay and rocker switch) from a known good donor vehicle. From here...http://www.rangerovers.net/repairdetails/airsuspension/faultclearsoftware.html I made up the cable and hooked up the PC to run the freeware and it revealed a litany of errors. F8 = 69 F9 = 227 FA = 213 FB = 0 FC = 255 FL signal incorrect FR signal incorrect RR signal incorrect Engine speed fault Vehicle speed fault Air supply leak Target heights incorrect Vehicle has moved Cannot lower FR Cannot lower FL FA:16_Hidden FA:64_hidden FL valve stuck closed FR ditto RL ditto RR ditto Inlet valve stuck closed Exhaust valve stuck closed FC:64_hidden FC:128_hidden The thing is, each time I run the program, it has different errors. When I read the heights, I get HIGH Profile: FL = 0, FR = 6, RL = 0, RR = 14 STANDARD Profile: FL = 0, FR = 0, RL = 0, RR = 247 LOW profile: 0, 0, 0, 14 ACCESS Profile: 0, 0, 0, 247 and, if I do them again, they are different again.... When I "get sensor heights" LF = 128, RF = 40, LR = 128, RR = 40 and, if I do them again, they are different again.... As for the " Cannot lower FL and FR in the errors, I set sail to town this morning to buy the bits for the cable and having manually inflated the old girl to approximately level, I plugged the valve body and compressor in, turned the key to start it and, as soon as it started, it dropped the front onto the bump stops. I limped to a service station, inflated the front again and as soon as I started it, back on the stops..... I unplugged it all, inflated it again and ran my errands, came home and got the errors above when I fired the PC up..... So, where do I even start debugging this shambles? Quote Link to comment Share on other sites More sharing options...
elbekko Posted October 16, 2017 Share Posted October 16, 2017 Are you sure you've got stable communication? If not, you'll just get junk responses (and that looks like junk responses). Quote Link to comment Share on other sites More sharing options...
JohnnoK Posted October 17, 2017 Author Share Posted October 17, 2017 elbekko, Thanks for the response, I have checked the cable and it has good solder joints with heat shrink sleeving, so I am confident that side of things is OK. Another forum suggested I check the OBD connector in the car, so that is on the cards for next up. Quote Link to comment Share on other sites More sharing options...
Arjan Posted October 17, 2017 Share Posted October 17, 2017 Sounds like the thing is generating a flood of errors, overflowing the mem bank. Without seeing and talking to the computers, it is going to be difficult. Bon Courage !! Quote Link to comment Share on other sites More sharing options...
elbekko Posted October 18, 2017 Share Posted October 18, 2017 If this isn't green, it doesn't matter how good your cable is, your responses will be junk: From memory you want a steady stream of FF/00 responses, if you're getting other things you'll get very weird results. Quote Link to comment Share on other sites More sharing options...
JohnnoK Posted October 19, 2017 Author Share Posted October 19, 2017 On 10/18/2017 at 10:05 AM, elbekko said: If this isn't green, it doesn't matter how good your cable is, your responses will be junk: From memory you want a steady stream of FF/00 responses, if you're getting other things you'll get very weird results. Ah! Thank you! It isn't green... it shows " No-Idle" even though the engine is running, and the challenge and responses are something like this.. TX RX 3247 : 1 3371 : 80 3248 : FF 3372 : 28 3249 : 1 3373 : 80 alternating each line... Quote Link to comment Share on other sites More sharing options...
elbekko Posted October 19, 2017 Share Posted October 19, 2017 Exactly what I meant, you've not got a stable connection. As others have said, time to start tracing what's wrong with the plug or the wiring. Or try the cable/software on another car first to make sure that's not the problem. Quote Link to comment Share on other sites More sharing options...
JohnnoK Posted October 19, 2017 Author Share Posted October 19, 2017 OK, so I unplugged and cleaned all the connectors with Wurth Kontact Oxidation Remover and reconnected it all. I did find oxidation and dampness in the multiplug in the driver's footwell area where the inertia switch lives, so all that lot god a goodly squirt of the cleaning muti. Will see on the morrow what it has delivered. Will also revisit my cable and it's connections with the soldering iron and multimeter to ensure goodness there, too. Quote Link to comment Share on other sites More sharing options...
task Posted October 20, 2017 Share Posted October 20, 2017 You need to change the com-port in the RSW software, ideally you should re-start the software everytime you change the com port to ensure you clear the errant communication out the buffer. Had this problem a few times on both the RRC and P38 Quote Link to comment Share on other sites More sharing options...
JohnnoK Posted October 26, 2017 Author Share Posted October 26, 2017 I went out and bought a pre-made cable and tried again, with weird results.... The Tx/Rx windows was normal on the Tx side, but the Rx only showed FF once or twice, not a successive string in response to the Tx. The status window went from No-Idle to blank, but was still RED background. I am back at work overseas now, so it has all been put on hold until I get home again.. Thanks to all the suggestions so far! Quote Link to comment Share on other sites More sharing options...
elbekko Posted October 27, 2017 Share Posted October 27, 2017 Are you using a serial to USB adapter? If so, which? Quote Link to comment Share on other sites More sharing options...
JohnnoK Posted October 27, 2017 Author Share Posted October 27, 2017 elbekko, No, straight into the serial port of my Dell Inspiron All-in-One PC. I was going to buy a USB adapter, but when I discovered the serial port, that got shelved. I had read that the Serial - USB adapters could cause trouble if they weren't good quality. Quote Link to comment Share on other sites More sharing options...
elbekko Posted October 27, 2017 Share Posted October 27, 2017 Yes, that's why I asked. Must be in the car then. You've already cleaned the connector in the kick panel? Quote Link to comment Share on other sites More sharing options...
JohnnoK Posted October 28, 2017 Author Share Posted October 28, 2017 20 hours ago, elbekko said: Yes, that's why I asked. Must be in the car then. You've already cleaned the connector in the kick panel? Do you refer to the connector (in a Right hand drive) behind the panel at my right foot where the bonnet catch is? It covers the roll-over inertia switch and 2 other connectors, one of which is around 16 wires? That bigger one had signs of corrosion on the terminals and was given a squirt of Wurth Kontakt OL which is apparently a corrosion remover, along with all others while I was in there. The next connection of the PC and software run was also weird, because the Tx/Rx issue appeared then. The fault page didn't show anything with the run, but I don't know if that is bad or a sign that i finally got something right.... Quote Link to comment Share on other sites More sharing options...
elbekko Posted October 29, 2017 Share Posted October 29, 2017 Yes, that's the connector I mean. The only time you should see the Tx responses change is if you're actually triggering an action (reading faults, sending to height, etc). If it's still not stable, I wouldn't trust anything you see in the application. Quote Link to comment Share on other sites More sharing options...
JohnnoK Posted October 30, 2017 Author Share Posted October 30, 2017 Mmmm, I think that connector may be my issue, then. Before I messed with it, it was reading all over the show, but afterwards, it was even worse. Oh well, I am away from the car until end November, so until I can get back to clean the connector again, it's all on hold. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.