RTH: AHC Globe Replacement, no movement after bleed and replacement

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ATwoZ

SILVER Star
Joined
Jul 21, 2019
Threads
32
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410
Location
Denver, CO
I'm in the middle of an AHC Globe Replacement following and relevant mud thread.

We went through and bleed DF, DR, DF then replaced DF Globe, then re-bled DR and replaced DR Globe.

Then did the same thing on the opposite side in same order. No issues with Globe removal or bleeding.

Refilled reservoir to a bit above the midway of reservoir (past-Max) knowing we'd be bleeding again.

I got the AHC error on the dash, but if I flip to on without starting and flick up the switch the pump kicks on.

The issue is even after many minutes there's no movement in fluid levels or vehicle. We've tried checking bleeders and all but DR will expel some fluid. DR will not expel fluid. Trying to start the car just gives error.
 
Now seem to have fluid coming out of all 4 bleeder valves.

However I'm noticing that when the engine is on I have the error and it shows 'Lo', but when it is just on it now shows 'N'
 
Got it fixed by using TIS to clear code and working fine, now just fine tuning fluid level
 
Got it fixed by using TIS to clear code and working fine, now just fine tuning fluid level

It's common after swapping globes to have this error. Just takes a few iterations of starting the car while selecting N to get enough volume into the system to build initial pressure. There's a time-out for the AHC pump in that if it doesn't see system pressure after x seconds of pump operation, it'll stop so it doesn't burn out. Something like 3-7 iterations seems to be enough to get the system going and it'll self clear the error.
 
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