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Search: Posts Made By: helmy
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03-22-2015, 11:00 AM
Replies: 28
Views: 20,792
Posted By helmy

Re: HCH1 IMA battery voltage reading & reconditioning

Back in business! Steve - THANK YOU very much for helping me through this, I really appreciate your help.

Since I already had the pack apart and it has essentially been sitting for a week, I went...
03-22-2015, 06:04 AM
Replies: 28
Views: 20,792
Posted By helmy

Re: HCH1 IMA battery voltage reading & reconditioning

I've pulled the board and orange plate off of that end of the pack. The orientation of the sticks and board are correct with alternating hex/square combinations which properly mate to the orange...
03-21-2015, 05:06 PM
Replies: 28
Views: 20,792
Posted By helmy

Re: HCH1 IMA battery voltage reading & reconditioning

UPDATE - FOUND IT! I should have realized sooner that not having voltage across that last pair was an issue. When installing that first stick the first time I reassembled the pack, I over-torqued...
03-21-2015, 04:00 PM
Replies: 28
Views: 20,792
Posted By helmy

Re: HCH1 IMA battery voltage reading & reconditioning

Thanks very much! That gives me something to go on. I will pull it apart again tomorrow and check what you've pointed out in the picture/diagram.

I was thinking that I was seeing 1/2 of the...
03-21-2015, 09:45 AM
Replies: 28
Views: 20,792
Posted By helmy

Re: HCH1 IMA battery voltage reading & reconditioning

Put everything back in the car, disconnected the battery for 10 min and then reconnected. I read about 48V at those terminals with the key off.

IMA light is still on, at idle (1k RPM) the red 12V...
03-21-2015, 08:37 AM
Replies: 28
Views: 20,792
Posted By helmy

Re: HCH1 IMA battery voltage reading & reconditioning

This morning I replaced the 12V battery with a new one (it needed replaced anyhow).

I have removed the battery pack from the car again and carefully checked all connections and compared to...
03-21-2015, 06:17 AM
Replies: 28
Views: 20,792
Posted By helmy

Re: HCH1 IMA battery voltage reading & reconditioning

I will try to measure shortly from those points. What should I expect the voltage to be?
03-19-2015, 06:14 PM
Replies: 28
Views: 20,792
Posted By helmy

Re: HCH1 IMA battery voltage reading & reconditioning

Thanks Keith. Yes, I turned the master switch back on. Is there an ideal place to test the voltage on the pack without removing it?

Should I be concerned about the P1445 code (Bypass contactor)...
03-19-2015, 12:28 PM
Replies: 28
Views: 20,792
Posted By helmy

Re: HCH1 IMA battery voltage reading & reconditioning

I hooked up some alligator clips to the voltmeter and connected them again to the IMA battery terminals. I now see the voltage approximately as follows:

~ 85V @ idle
~ 90V cruising at 40mph @ ~...
03-19-2015, 10:29 AM
Replies: 28
Views: 20,792
Posted By helmy

HCH1 IMA battery voltage reading & reconditioning

I'm trying to diagnose IMA issue(s) on my 2004 HCH. I've had the dreaded IMA light on for some time now along with codes 1600 and 1570. The problem is compounded by the fact that the car is overdue...
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