07 corolla keysense?
Printed From: the12volt.com
Forum Name: Car Security and Convenience
Forum Discription: Car Alarms, Keyless Entries, Remote Starters, Immobilizer Bypasses, Sensors, Door Locks, Window Modules, Heated Mirrors, Heated Seats, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=97755
Printed Date: May 29, 2024 at 4:09 AM
Topic: 07 corolla keysense?
Posted By: jeff194
Subject: 07 corolla keysense?
Date Posted: October 07, 2007 at 7:37 PM
I just installed an audiovox prestige APS57 remote start with a DEI 556U immobilizer interface. Here is the problem. The remote start will start the car and run fine. However if you shut the car off using the RF remote control, then attempt to restart the car using the remote , the car will start run for 5-10 seconds and shut off. during this time the security light is off. I am thinking I need to hook up a keysense wire, but don't know if it should be from the remote starter ground wire or from the immobilizer box. Any help would be appreciated. The car is an 07b Toyota Corolla LE Auto.
Replies:
Posted By: enice
Date Posted: October 07, 2007 at 10:29 PM
Diode isolate and connect that wire to the blue/black wire from the ignition harness. It should show positive voltage when no key is in cylinder and 0v when it is.
Posted By: jeff194
Date Posted: October 08, 2007 at 7:53 AM
OK< I assume we are talking about the wire, that is for keysense from the DEI then, not the remote start itself ?
Posted By: Chris Luongo
Date Posted: October 08, 2007 at 12:49 PM
Keysense is only needed on Toyotas with a factory alarm. I've never seen a Corolla with an alarm.
The security light is supposed to be off when the car is trying to start; that's normal.
Are you using voltage sense or tach? I'm guessing voltage, based on the 10 second runtime.
Try changing the voltage threshold (in the programming menu) to the other, non-default setting.
If that doesn't work satisfactorily, use the tach wire at the instrument cluster. (You can find more details about the tach wire with the search feature.)
Posted By: jeff194
Date Posted: October 08, 2007 at 9:19 PM
Thanks for the reply. I am using volts not tach signal, and I have changed the voltage settings to no avail. I called DEI Tech support. They told me to diode isolate the ground wire I am using to ground the Immobilizer. and also use that to ground the keysense at the ignition. I will give this a try. What I don't understand is why the remote start works fine, until you kill it using the RF remote control. When you attemt to restart using the RF remote it starts, then dies a few secons later. If you put the key in the ignition, start the car, turn it off, remove the key, and remote start. the cycle starts over again. Another point of confusion is the DEI 556U I am using has a - keysense wire comming out of it. But DEI says don't use it. Go with the isolated diode method.
Posted By: Chris Luongo
Date Posted: October 10, 2007 at 4:27 PM
Again, the keysense wire has nothing to do with it, and isn't at all necessary.
If the immobilizer were the problem, the car would never start at all, not even for a second. Some cars work that way, but not Toyota.
I've installed Audiovox product for years, and voltage sense doesn't always work well on Corollas. Most of the time it's OK, but not always.
Connecting tach at the instrument cluster shouldn't be more than a 5 minute job, maybe 10 at most.
Most likely, the reason you're having the trouble is because after the car was just running a moment earlier, the battery voltage is already relatively high............after the remote starter starts the car, it doesn't see enough of a voltage increase to make itself happy.
I'd guess that if you remote start the car, turn it back off with the remote, but then let it sit there for 10 or 20 minutes, that it'll work OK next time you use the remote starter.
Posted By: jeff194
Date Posted: October 15, 2007 at 12:42 PM
OK got it working now, connected the tach at ECM first wouldn't pick up signal. Took your advise and picked it up at cluster and worked fine. We used another output from the remote start to trigger keysense. It wouldn't work without it. Thank to for the help.
Posted By: profuse007
Date Posted: October 16, 2007 at 3:57 PM
^youre right.
Key Sense BLUE/BLACK (-) IGNITION HARNESS *
*note: STATUS OUTPUT DURING REMOTE START WILL DISARM ALARM WITHOUT UNLOCKING DOORS
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Houston,TX
"The two most common elements in the universe are H+ and stupidity" (Ellison).
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