electric power consumption during overnight parking?

[Enjoyneering]

Well, I'm stuck. Looks like the dashboard controls a lot of stuff in the car - radio, clock lamps & etc. I has two connector - green and blue. Green is the input power, and outputs signal for enable/disable radio, clock... Blue one, as far as I understand, is input signals from doors, sensors, buttons...

- When blue cable is disconnected - power consumption remains the same - 0.2Amp.
- When green cable is disconnected - consumptions drops to 0.003Amp.
- When two cables are plugged in and doors are locked - clock is off, radio is disabled & doesn't react on the power button. When doors are unlocked - clock is on, radio react on power button.

The main dashboard controller - MC9S12HZ256VAL . According to the datasheet it's power consumption is 0.065Amp in normal mode and 0.0048Amp during the sleep.

Something else eats 0.2 - 0.065 = 0.135Amp. Any ideas? Does any body have dashboard pinout?

[Enjoyneering]

Any ideas? Does anybody have electric schematic for Aveo 2009?

[Daox]

Have you checked to see what a new cluster costs? If its cheap, it might be worth it to just replace it and see if that fixes it.

[Enjoyneering]

I think instead of buying parts with no season the cheapest way will be to sell the car & never buy a chevy again. It's my first chevy and I'm 99.9% sure that it's my last one. The 0.01% is for - never say never.

Does anybody have an ammeter and can measure the current? Thank you in advance.

[Enjoyneering]

Hi All,

I've started reverse engineering of Instrument Panel Cluster (IPC). The battery connected to Green connector pin 24 through Cluster/Room Lamp fuse. First 20-30 seconds the cluster controller MC9S12HZ256VAL tests(calibrates???) speed/tacho/temp/fuel gauges (teeny-tiny step motors) and turns them off. For some reason the fuel gauge stays on (controllers doesn't go to sleep and keep fuel gauge step motor on).

Chevy engineers wired analog fuel tank sensor to Engine Control Module (ECM) and than ECM sends digital signal via data link (assume it's slow CAN bus) to Instrument Panel Cluster (IPC).

Now the question - it doesn't go to sleep because it's not receiving correct digital signal? Because MC9S12HZ256VAL is damaged? Because some over green/blue pins have to be pull to ground or to Vcc to activate sleep mode?

Any help would be much appreciated.

[Enjoyneering]

Update

The behavior changed, after I connected all cables and locked the doors - speed/tacho/temp/ stay energized and fuel gauge is off.

I'm lost.

[Daox]

My uncle had issues with his digital dash readout in his Volvo. I was able to fix it by resoldering the tabs on the larger chips on the circuit board. It apparently is a fairly common issue with those instrument clusters. I couldn't see any bad joints visually, but by putting my iron on each one, it fixed the issue. With intermittent problems, I wouldn't be too surprised if this was the case. The Aveo clocks have similar issues.

[Enjoyneering]

Well, Daox you were absolutely right - it was bad contact between dashboard controller & pcb. After I've re-soldered all 112 pins everything went to normal. Now consumption is ~0.0001Amp.

I've also found an easter egg - part of the screen is covered by the label. Chevy doesn't want competition between aveo and pontiac g3 wave, so they cover the screen to make it looks cheaper.
I've cut a bigger window, looks better now.

Thank you Daox for help.

[Daox]

Awesome! Glad it worked for you.

Nice find on the free cluster upgrade too haha. You should post a new thread about that so more people know. They won't find it in this thread most likely.

[Enjoyneering]

There is also a push button on the board to switch modes: avr. fuel consumption etc., but it covered by plastic body. I've parallel two buttons with wire and it works. Now I can switch the modes with one button.

I'm tired to make a new post. Can you do it?