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Old 08-03-2011, 12:48 PM #1
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A/C delay when starting up?
We just recently returned from our 3600 mile sojourn to Maine and back to Memphis. I have previously direct wired my ARB fridge to the stock battery and soft wired my radar detector. On our return leg I noticed that when starting the car there was at least a 30 second delay before any a/c power (the a/c controls are dark). This is definitely new, very noticeable, and hot! After about 30 sec the power lights on the a/c are available and it kicks in. Any one else experienced this? Any correlation to an overworked stock battery powering our fridge while camping? Thanks in advance. I didn't find anything when I searched.
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Old 08-03-2011, 01:07 PM #2
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Sounds logical. Antman should be able to help on this topic.
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Old 08-03-2011, 01:41 PM #3
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Lol- first off, I am definitely not an expert in electronics. Far from it in fact. But- I do think your problem was a drained battery. It sounds like the initial load- fan, A/C compressor, etc was too much for the alternator to handle. Who knows what the Toyota Engineers have programmed into the computer to protect the electrical system...
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Old 08-03-2011, 02:03 PM #4
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Originally Posted by Antman View Post
Lol- first off, I am definitely not an expert in electronics. Far from it in fact. But- I do think your problem was a drained battery. It sounds like the initial load- fan, A/C compressor, etc was too much for the alternator to handle. Who knows what the Toyota Engineers have programmed into the computer to protect the electrical system...
I concur. There is probably a minimum setpoint in the logic before different loads are introduced (and - or - nor) into the circuit. In my world we call this a soft start -measuring the loads beforehand and controlling the amount of time a system takes to come online by making sure the load will not overpower the prime mover. The A/C, on a stock vehicle, would be the one I would limit on startup.
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Old 08-03-2011, 02:10 PM #5
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The other factoid I left out is that my fridge has been out of the truck for a couple of days and the a/c is still delayed. Will the battery recover or is it time to look into a different setup? The fridge is the smallest one ARB makes and was supposed to be ok for a single battery setup. Maybe it's time to get a proper 'manly' battery.
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Old 08-03-2011, 02:37 PM #6
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The other factoid I left out is that my fridge has been out of the truck for a couple of days and the a/c is still delayed. Will the battery recover or is it time to look into a different setup? The fridge is the smallest one ARB makes and was supposed to be ok for a single battery setup. Maybe it's time to get a proper 'manly' battery.
If your battery is significantly discharged it could take a while to charge back up under normal driving conditions- especially if you are still putting a considerable load on the electrical system. You may want to take a short trip to charge it back up-

What is your "soft- wired" radar detector? Maybe you have a constant drain on the battery when the vehicle is off? Even a small load adds up over time to drain the battery!
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Old 08-03-2011, 03:36 PM #7
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Basically using an invisicord product to patch into the dimming rear view mirror for radar detector power. As you know I am a noob and will defer to you, but when I turn the car off the radar detector also turns off, could this still cause drain?

Anyone Hardwire a Radar Detector yet?
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Old 08-03-2011, 04:17 PM #8
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Nah- that sounds like it's not a problem!
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Old 08-03-2011, 05:43 PM #9
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I've noticed that occasionaly the AC/blower will be off after starting the truck even though the manual knob is clearly showing the fan being on. I haven't waited to see if it kicks on after a few minutes, cycling the fan speed knob activates it. I don't know if it's temperature related, but it does happen ocassionaly....
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Old 11-24-2012, 05:42 PM #10
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Anyone else getting these issues? I'm having the same thing happen as the poster above me, nothing plugged into the electrical outlets.
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Old 11-24-2012, 06:19 PM #11
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Quote:
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Anyone else getting these issues? I'm having the same thing happen as the poster above me, nothing plugged into the electrical outlets.
Haven't noticed that before, but might just not pay attention. Now have to wait until summer to take a look : )
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Old 07-21-2019, 07:46 AM #12
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Ac delay
I’ve noticed the same issue. But mine is consistently around a 60 second delay whether or not the car is cold or hot. Just started happening, used to turn on right when the car turned on. There is no power to the ac/heat buttons. After about a minute system turns on lights turn on and air kicks in.
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Old 07-21-2019, 11:17 AM #13
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Quote:
Originally Posted by EEEliminator View Post
I've noticed that occasionaly the AC/blower will be off after starting the truck even though the manual knob is clearly showing the fan being on. I haven't waited to see if it kicks on after a few minutes, cycling the fan speed knob activates it. I don't know if it's temperature related, but it does happen ocassionaly....
Quote:
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Anyone else getting these issues? I'm having the same thing happen as the poster above me, nothing plugged into the electrical outlets.
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Originally Posted by Willybf View Post
I’ve noticed the same issue. But mine is consistently around a 60 second delay whether or not the car is cold or hot. Just started happening, used to turn on right when the car turned on. There is no power to the ac/heat buttons. After about a minute system turns on lights turn on and air kicks in.
I have noticed this as well.

Turn the fan switch to off then back on does the trick. Doesn't happen all the time but I do notice it when it does happen. Thought it was just mine!
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Old 07-22-2019, 05:08 PM #14
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I have noticed this as well.

Turn the fan switch to off then back on does the trick. Doesn't happen all the time but I do notice it when it does happen. Thought it was just mine!
Mine does this too on occasion. I don't have any aux stuff.
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Old 07-22-2019, 07:58 PM #15
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Mine does this too on occasion. I don't have any aux stuff.
+1 here too, only have like 3500 miles on the 4r.
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