obc don't work on m/g

[appletree]

my obc has never workeng on the m/g function since i installed it on my IS and ui thought this was just because it had a 6 pot coding plug in it so i ordered the on e for the Is from germany and it still doesnt work.

any ideas? could i have missed somthing when i installed it or could there be a dodge connection some were ? were abouts??

[Steviec]

Does the MPG info get read from the back of the dial cluster (small green connector)? If so, might be worth checking its in the right place?

[appletree]

do you mean the speedo cluster or the back of the Obc? i havent got any wire plugged in the speedo cluster?? sure i followed the zone guide when i put the OBC in

[gcorky]

as said cluster must be hooked up or there will be no avg speed,cons,limit,range functions working


all dash-econometer-etc working?

[Cloggy Saint]

Doesn't it get it's power from the cluster? If it wasn't hooked up it wouldn't do anything.

[orangecurry]

there is a large yellow plug on the OBC loom which goes in the back of the cluster into a large yellow socket, but that is the main input to the OBC; you'll definately be needing that

[Brianmoooore]

The m/g function on the OBC uses the same info from the cluster that works the economy gauge under the tacho, som if this works, it's probably a problem with the OBC.
All the data for the OBC, except external temperature, comes along the single loom from the yellow socket on the cluster.

[appletree]

right, the big yellow plug is in and the every thing works on both the OBC and the Speedo cluster expt the M/G on the obc.

[orangecurry]

I found that the OBC can be temperamental - try disconnecting then reconnecting it to the loom with the ignition on

is that OK Brian? It didn't do mine any harm...

disclaimer - doing anything that I suggest may or may not result in a total catastrophe

[Brianmoooore]

I found that the OBC can be temperamental - try disconnecting then reconnecting it to the loom with the ignition on

is that OK Brian? It didn't do mine any harm...

disclaimer - doing anything that I suggest may or may not result in a total catastrophe

Unlikely to do any harm, but easier to disconnect the battery for a couple of minutes if the cluster is screwed in place.

[orangecurry]

no no no - you have to do it with the ignition on..... I suppose you could do it your way (with the ignition on)... I suppose

but then the 'petrol fuelling stalling at junctions' might happen - swings and roundabouts

just pull the rear of the OBC off then put it back on with the ignition on; it only needs the dash to be in pieces

[Brianmoooore]

I mean with the ignition on. Couple of minutes with the battery disconnected doesn't upset the idle settings in my experience, but make sure you have the keys or a window open, as reconnecting a battery usually arms the alarm and engages the central locking.