![]() |
Quote:
I couldn't find a Techstream parameter for IAM anywhere, so I figured that it was likely not easily available on the CAN bus. |
Quote:
|
Quote:
The OP2 is configured to send its requests to 07E0 (ECU), not 07B0 (VSC). I think to get control of that, we'd need to get a firmware rewrite from Colby. I think we would have much better CANbus access to all modules at the moment using an Arduino and CANbus shield; I haven't the time to crack it at the moment. This CANbus talk is getting a bit off topic, but if anyone can point to where the ECU interfaces with the VSC unit; and if the VSC data is put in RAM on the ECU, we can pull the data straight off the ECU with the OP2. |
Quote:
I'm eager to hear if this is in RAM in the ECU anywhere. Sent from my XT1045 using Tapatalk |
<Off topic> Examples of CAN requests to ECU using Drew Tech Canbus tools:
Engine on idle, requesting MAF data OBD Mode 01: Send: 00 00 07 e0 01 10 (mode 01, PID 10) Response: 00 00 07 e8 41 10 03 b8 (repsonse 41 (01+40), PID 10, Data 03 B8 (7.68 g/s) OBD Mode 23: Send: 00 00 07 e0 23 14 ff f8 7c 70 04 (mode 23, 14:?number of parameters + data length, RAM address FFF87C70, 04:?bytes expected) Response: 00 00 07 e8 63 41 15 e6 66 (response 63 (23+40), data 4115e666 (IEEE 754 float = 9.37 g/s) |
1 Attachment(s)
Anyone have any idea what this (FFF884F4 for A01G) may be? I was looking at how data calls are made to get 16 bit sensor data and this one came up: a voltage value gets read from the 16 bit routine and then scaled by a table (defined at 0B1FA8) which reads like a temperature scale; 100 to -40 in 10 degree increments.
Does not match with any other temperature sensors that I log. |
Not much help with yours @ztan but more of a question for those who are good at discovery.
Been trying to work out why the throttle closes under WOT and am doing some digging around. I don't suppose anyone fancies digging into the throttle angle routines. It's definitely nothing to do with requested angle, however there must be something that causes this. It seems fairly uniform between FI and NA cars too. I've tried testing Requested torque and calculated tq tables but nothing there has yet made any difference. |
Rev limit code
1 Attachment(s)
Shiv asked me to look at an RPM limit problem under boost and there is something interesting in the code worth noting:
Rev Limit A and B have their cut and resume values in different directions (see disassembly pic). No reason for the engineers to do this and Rev Limit B works without hysteresis in the stock ROM which is has 7400 as the first (resume) value and 7200 as the second (cut). A01G def: Code:
<table name="Rev Limit A" storageaddress="10C524" /> |
| All times are GMT -4. The time now is 07:32 PM. |
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
User Alert System provided by
Advanced User Tagging v3.3.0 (Lite) -
vBulletin Mods & Addons Copyright © 2024 DragonByte Technologies Ltd.