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Voltage drop

Tiny
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You could have a intrrmittently
Failing alternator or a bad junction box under the hood feeding low voltage intermittently. So does the car ever die when it acts up?
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Sunday, July 3rd, 2016 AT 8:01 AM
Tiny
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No the car never dies. Before to start the car I had to push slightly on the ignition switch while turning the key to the run position I do not know if it related to the problem.
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Sunday, July 3rd, 2016 AT 8:37 AM
Tiny
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Sounds like the ignition switch is failing that could cause voltage loss.
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Sunday, July 3rd, 2016 AT 9:35 AM
Tiny
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I replaced the ignition switch
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Sunday, July 3rd, 2016 AT 12:30 PM
Tiny
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Just now?Or before that?
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Sunday, July 3rd, 2016 AT 2:08 PM
Tiny
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Before
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Monday, July 4th, 2016 AT 10:38 AM
Tiny
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Before. Yesterday I performed a alternator voltage drop. The hot side was 0.2v at idle and accessories on( headlight, ac, warning lights, back defroster). The negative side was 0.05 at idle
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Monday, July 4th, 2016 AT 10:42 AM
Tiny
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Iam more worried about what it is across the battery terminals when it's running.
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Monday, July 4th, 2016 AT 11:33 AM
Tiny
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I think it was 14.2 v
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Monday, July 4th, 2016 AT 11:36 AM
Tiny
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Ok I checked voltage again when car is at operating temperature and at idle voltage was between 14.1 to 14.4. And I measured the ac voltage too it was at idle 0.05 V
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Monday, July 4th, 2016 AT 11:51 AM
Tiny
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That's the tipim fuse box under the hood I have seen them go bad and cause all kinds of problems. It's a fuse box with a computer. They can be intermittent and hard to diagnose. Try clearing the codes then while it's running push on the relays and different parts of the tipim fuse box and see if the codes come back.
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Monday, July 4th, 2016 AT 12:48 PM
Tiny
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I will do that.
I have a question what is the minimum acceptible voltage an alternator produce when the car is running at idle with all accessories off
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Tuesday, July 5th, 2016 AT 8:37 PM
Tiny
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Today I took off the tipm from his mounting bracket and wiggled the connectors, a p0882 code shows up. The problem was the yellow with brown strip wire coming from the pcm had bad connection at the tipm connector. I think p0882 code is fixed I cleared the codes and I did not see code p0562 yet.

Thank you so much for your help
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Saturday, July 9th, 2016 AT 4:47 PM
Tiny
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What happens is the large wires run a lot of current thru them wwith a lot of heat. So they open the terminal connection over time. Glad to hear you got it fixed that's what we're here for.
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Saturday, July 9th, 2016 AT 7:09 PM
Tiny
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Today the p0882 code came back. I removed again the tipm and wiggled the wire that I fixed last time coming from the pcm to the tipm no code (p0882). I did the test when the ignition was in run position engine off I did not see code in the obd2 code reader. After that I said ok lets wiggle the computer connectors. When I did that strange things happend the obd reader did not want to communicate with the pcm, the anti theft security light was flashing and squares arround the PRND symbols in the dash.

Is it normal? Or I have problem with the pcm connectors
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Sunday, August 7th, 2016 AT 8:52 PM
Tiny
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Sounds like the wires the terminal tightness at the end of the connector opening or the tipm itself My best guess would be a open terminal end on one of the large main power feed wires.
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Sunday, August 7th, 2016 AT 9:30 PM
Tiny
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I wiggled the pcm connectors. I had to disconnect the battery to let the strange events dissapear
how can I check for an open wire at the pcm connector?
Could it be a loose connector also?
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Monday, August 8th, 2016 AT 8:16 AM
Tiny
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You unhook the connectors and look at the Opening's and see if any of them look different then the others. Take pictures and post them.
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Monday, August 8th, 2016 AT 8:15 PM
Tiny
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Today I Wiggled again the pcm harness connectors no issues. I think the connectors were not all the way in the male computer connectors. Last night I disconnected the connectors and made sure I hear the clicking sounds of the connector seating right.
I did not take pictures because I did not want to generate more problems. But if the issue comes back I will take pictures and post them. I will wait few day and see

thank you so much
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Tuesday, August 9th, 2016 AT 7:34 PM
Tiny
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Your welcome were here to help keep us posted on how you make out.
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Tuesday, August 9th, 2016 AT 7:40 PM

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