| [Home] | [Hardware] | [Software] | [Issues] | [Solved issues] |
It isn't working unfortunately. It just assigns stepper output to water pump, but that can be done in Outputs section of VemsTune. Which is the place where I assigned stepper output to idle control.
So I guess both questions stand. How to properly test those outputs and what to do if test is negative?
Well, just figure I hadn't enabled Stepper chip in the first place. According to manual:
"Enable the Stepper Motor Driver
First we need to enable the Stepper motor output by setting the S259 ch7 output to be permanently on using the waterpump activation.
Go to [tt]Extras->Fan / Water Pump / FuelPump[/tt] and set the water pump Start Temperature to -40 (its default) and its channel to S259 7"
Somehow missed this as it didn't seem to be relevant... I'll try that and report hopefully by placing this 2nd issue to Solved Issues page :).
2) Date: 24.04.2012. As I mentioned in Hardware section, it appears I have burned stepper outputs. But I'm not sure how to properly test it. When I test it with VemsTune output test, or test it when ignition is turned on (powering VEMS) there is no power in any of 4 stepper outputs, only grounds in 3 of them (test is done with standard DVM).
The way I initially hooked my unipolar stepper (at the time I had no clue there are 2 types of stepper motors) was as pictured in PhatBob's guide. It didn't work, so I applied power to additional 2 pins of the stepper motor (there are 6 of them - 4 for the coils and 2 for the power +12V). With this wiring stepper just jiggled in place and got hot over time.
So, the question is, is it possible to fix the outputs and what should be replaced inside VEMS to fix it? I'm trying to figure this out because current 2 wire IAC is very inconsistent and every time I start the engine it fluctuates and I have to change the IAC frequency setup to get it working. It works properly only when the engine is hot and even then it has to be changed if restarted.