IMA Control & BCM Gauge Combo

[02insight]

wish I lived in the UK, i'd do a full writeup/ pictures/video If I could buy one of these.

[retepsnikrep]

O2Insight buy one of Mike's Mima kits he still has 100 boards. I still use my MIMA

Joe.

I don't like the long wires on those signals and my pcb is mounted in the ipu and only tiny lengths of wire are needed for those mima signals in back. The other signals are simply analog like map v and throttle etc.

Mamode 2 must also be cut as you have to have control over it. My system controls all three cmdpwr, mamode1 & mamode2.

I havent got round to explaining the back part of the install yet, we hope to document a full one at our UK gathering just over a weeks time.

[nasphere]

Originally Posted by retepsnikrep

Mamode 2 must also be cut as you have to have control over it. My system controls all three cmdpwr, mamode1 & mamode2

Do you have a relay that reconnects mamode2? My system just piggybacks onto the back of mamode2 (ran out of relays). Since I actively read mamode1, I can cancel charge during ECU assist times to keep from getting a P1449 and P1649.

Did you put decent capacitors on the power rails to clamp the EMI in the box? I found my interference was all because I didn't have the right capacitors in the right places.

I like the idea of putting the control circuit in the box to keep the wires short, except the part where I've already made the long harnesses ($120 in silver/teflon wire), but shouldn't be hard to fix *cries*. Those shielded wires kick ass though, over 6ft long shooting 8mhz SPI through the IPU compartment without any faults.

Great work so far. Kudos!

[retepsnikrep]

I don't use any relays

I use a tiny 100uf 6.3v cap and a number of 0.1uf caps on pic inputs and IC power rails. I take my power from the MCM main 5v bus, it's already very well smoothed an filtered.

[retepsnikrep]

Tried the new cruise control and the SCS code today. No glaring issues.

1) SCS code works spot on and flashes lights on dash to indicate stored codes for us UK owners with no brown wire at the DTC plug. EPS SRS IMA ABS etc etc

2) Cruise also works but it lurches a bit at the moment between assist/regen when the actual speed is at or adjacent to the requested cruise speed.

So some code work reqd on averaging the speed readings to get a more stable figure and a ramp to be added to more gently feed in assist/regen when cruise requests it.

Good progress though and all parts have arrived for the kits.

[The Citrus Smoothie]

I am taking my Insight tomorrow to a helpful audio guy to get the ribbon cable under the carpet and spliced to the ECM. Is the ECM literally under a lid in the passenger footwell (like my old Audi A2's)?

[jonnyvtec]

Its pretty typical of Honda to put them under a plate in the footwell, same with the Honda engined Rovers with OBO0. There was a clear window on the footpanel, so if you pulled back the carpet you could look in and read any codes from the LED flashing.

Ive got some bits from maplin, Ive actually gone with Cat5e for the main run from ECM to the control board however the 4 way audio ribbon cable (TS85 on the site) for the switch hasnt turned up and instead I get some rather heavy gauge single core.....

With the Cat5e i might use a wire from each twisted pair to couple up the cables and give a degree on EMC shielding. I trust thats okay for the currents you expect Peter?

Got my display screen aswell. PCB isnt much bigger than the screen all the way round so should look neat when I've decided where its going an prototyped a mount.

Thought of names for this system Peter?

[retepsnikrep]

I'll try and bring some wire as well.

Remember to seperate the wire ends slightly and insulate them from each other at the ipu compartment end so they don't short out in meantime.

Also make a note of which wire/colour in your wire you have connected to which wire at the ECM we need to know that come install day!

Leave plenty of wire spare so you can mount the switch and lcd where you want.

Name I hadn't even considered it but am open to ideas.

Just tried some modified speed sensing code and cruise tweaks it's much better, almost useable now, just need to tweak the calculations a bit more as IMA display is lagging slightly behind oem speed by a second or so.

I had another idea about mounting the switch, how about on the end of the indicator or wiper stalk. I reckon you could dremmel the end out and recess it in there to give a little knob on end of the stalk. Use some very fine wire and route it through stalk into steering column cowling. I might try that as another option. We won't be doing any steering wheel switch installs on the day it's too fiddly. Think about where you want the switch.
The easiest places will be gearstick cowling or steering colum cowling.

Don't forget gaffer tape, epoxy glue, glue gun, sticky pads etc to help you mount switch in choosen position. Switch pdf here for dimensions etc. Hole size etc.

http://www.farnell.com/datasheets/85573.pdf Ours is photo 3.

You need a little wooden knob for the end of it.

Currents are negligible. Use the thinnest wire you can get.

[joecvt]

Originally Posted by retepsnikrep

Joe, I don't like the long wires on those signals and my pcb is mounted in the ipu and only tiny lengths of wire are needed for those mima signals in back. The other signals are simply analog like map v and throttle etc.

Understood.....My wires are not too long either with the home made MIMA_L .....I used the old school method with the cable harness under the shift console that runs to the back of the car with the MIMA board mounted under the shift console as well. Total additional wire length is about 20 inches for each cmdpwr and mamode1 (cut) and 10 inches for mamode2 (tap). A bit harder to find the MIMA wires after undoing the bundle but that was the default method back in the wee early days of MIMA_L before Mike started working on MIMA_C and plug and play connections.

JoeCVT = Just your average CVT owner

[retepsnikrep]

Originally Posted by joecvt

10 inches for mamode2 (tap).

I don't understand why people don't cut/control the mamode 2 it needs to be under our control to prevent ima errors in quite a few circs.