Odd G-sensor, Attesa Test Results

[sigsputnik]

hi guys,

i've been trying to fix my attesa. i get 13 flashes on the led, so that means fore and aft g sensor or circuit. i can get the number of led flashes to change if i unplug the g sensors (variously from 11, 12 and 16) so i don't think the control unit is lying.

in multimeter testing i got the following results:

control unit harness side resistance = 34.5k ohms (i.e. between 30 and 50 k ohms)

control unit connector voltage = 1.97v (i.e. g-sensor faulty)

g-sensor side resistance = 27.2k ohms (i.e. g-sensor faulty) (not between 30 and 50 k ohms)

g-sensor vehicle-side voltage = 7.99v (i.e. g-sensor faulty)

i thought i'd narrowed it down to the g sensor. i removed the g-sensor and tried it again, this time out of the car. the resistance went up to 30k ohms (i.e. harness faulty).

my question is:

could removing the g-sensor like this somehow explain the (small) resistance increase?

as you can see, all my other evidence says it's a faulty g-sensor but i'd like to be sure. i don't want to get another g-sensor and then find out it's the harness.

any ideas?

sig.

Edited August 17, 2006 by sigsputnik

[cowie165]

Hi Sig, nice work. I'm not sure how to diagnose dodgy harness but the g-sensors will have a little red line through that window on the top, when they are broken. Does this make sense?

Will your workshop allow you to try before you buy? ie. plug in a replacement and recheck voltages?

Sorry mate, I'm not much help today.

[sigsputnik]

cheers mate - actually i forgot to mention, the shock window is not red at all. i guess i thought that perhaps the unit was dead, but not through shock, or that the mechanism for turning the window red was also stuffed.

i'm wondering if Consult would give me more information (i.e. whether it's worth buying a Consult unit to test this out).

[cowie165]

I don't think I have seen g-sensor output on consult, but I'll go and check this morning. Are you in Sydney?

[sigsputnik]

no mate, not in sydney - don't worry about it, cowie, it's ok. i'll get a new g-sensor and then post back the results. it'll be an interesting adventure anyway.

i'll probably buy a consult unit sometime soon, regardless. seems like a useful tool.

cheers mate