service engine light remote starting
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=117007
Printed Date: July 12, 2025 at 4:39 PM
Topic: service engine light remote starting
Posted By: snaoum
Subject: service engine light remote starting
Date Posted: October 16, 2009 at 4:19 PM
I recently installed a Hornet 569T remote starter in my fathers 2000 Chevy Express Van and bypasses the security aswell. I've installed many remote starters however this one is different. Once I remote start the van and runs for few seconds the Service Engine light appears. It does not happen when starting the van by key. Any ideas why? I have double checked all the wiring and all is correct, however I should add I did not wire in the tach wire, could that be the reason?
Replies:
Posted By: Twelvoltz
Date Posted: October 16, 2009 at 4:51 PM
The tachometer connection is for the remote start to know the vehicle is running. It controls the length of time the starter is engaged. In my opinion you should hook it up to ensure the vehicle starts correctly every time you remote start it. Not hooking up the tach will not trip the check engine light. However not hooking up a required ignition or accessory wire will trip it.
What vehicle wires did you not hook up?
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Installer, IT support, and FFL. I need less hobbies.
Posted By: snaoum
Date Posted: October 16, 2009 at 5:20 PM
All wires are hooked up, only tach not wired. I have ign 1 and 2 wired, ign1 being pink/white and ign 2 being white. I wired Accessory 1 but not 2 and today I just wired Acc 2 to Acc2 since the remote starter does not have Acc2 output.
Posted By: Mike M2
Date Posted: October 16, 2009 at 7:53 PM
I think you need to verify power on the white 2nd ignition wire with a DVM. No power there will trip the light. Tach won't matter. What bypass are you using?
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Mike M2
Tech Manager
CS Dealer Services
Posted By: snaoum
Date Posted: October 16, 2009 at 9:16 PM
I am using the resistor to bypass it
Posted By: syl20rochon
Date Posted: October 16, 2009 at 9:27 PM
Tach is not relevant to your problem but ignition 2 (white) is....make sure your connection is working good with your multimeter, also...you should get a bypass module like PLJX from Bypass kit or others because installing a fix resistor is really unstable and can trigger the check engine light. You should also feed the second accessory wire(Brown) using the small orange (-) output to trigger and external relay. I came accross GM vehicules the needed the brown wire to be connected. Let me know,
Sylvain Rochon
Hawkesbury, Ontario, Canada
Master tech at GAG. ------------- Sylvain Rochon
MECP security specialist
Tech support for remote starters
26 Years of experience counts
I'm here to help.
Posted By: snaoum
Date Posted: October 16, 2009 at 9:42 PM
Today I wired the 2nd accessory so we will see if the code goes away. I double and triple checked the 2nd ignition and its good. The resistor bypass works fairly well as I have done that type of bypass for a while and not one has let me down, its getting the correct resistance so I dont believe thats the problem.
Posted By: syl20rochon
Date Posted: October 16, 2009 at 9:58 PM
Did you use the pink/white for your second ignition? If you used the negatives outputs to trigger an external relay, if you own a Directed Bitwriter, check the negative output timing, make sure it triggers as soon as the receiver receives the signal and not later. There is a timing issue between the blue and blue/black wire...if my memory serves me right, I believe that the blue wire activates faster than the blue/black. ------------- Sylvain Rochon
MECP security specialist
Tech support for remote starters
26 Years of experience counts
I'm here to help.
Posted By: snaoum
Date Posted: October 16, 2009 at 10:10 PM
2nd ignition for a 2000 Chevy Express van is a white wire, I am using the pink/white from the remote starter and its wired to the van's white wire.
Posted By: syl20rochon
Date Posted: October 16, 2009 at 10:25 PM
Perfect......let's see if the second accessory will work...good luck.
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Sylvain Rochon
MECP security specialist
Tech support for remote starters
26 Years of experience counts
I'm here to help.
Posted By: snaoum
Date Posted: October 17, 2009 at 7:50 PM
Well still service engine light coming on even with accessory 2 hooked up now. Any ideas?
Posted By: syl20rochon
Date Posted: October 17, 2009 at 8:39 PM
I have access to technical help at directed, I'll call them on monday and see what they have to say....Question, you wired your passlock as version 2...right? So you measured your resistance with the motor running, voltage divided by current....E/I=R.
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Sylvain Rochon
MECP security specialist
Tech support for remote starters
26 Years of experience counts
I'm here to help.
Posted By: snaoum
Date Posted: October 17, 2009 at 10:11 PM
I know is passlock 2, what I did was I measured the resistance with the key in the On position and while running, and everytime I got 2.1K and that is the fixed resistor I am using and no security light. The van starts up and stays running, everything is working.
Posted By: snaoum
Date Posted: October 17, 2009 at 10:14 PM
Once the resistor was wired in I did the key relearn procedure and the car learned the value of the resistor. I cut the yellow wire and wired the resistor to the car side (not key side) yellow wire and the ORANGE / black wire. Once the resistor was wired in i put the key and put it to the on position and after 10 min the security light turned off, did that three times and now it learned the resistance.
Posted By: snaoum
Date Posted: October 20, 2009 at 9:47 AM
Ok so the problem has gone away, after wiring in the accessory 2, its been now 2 days and no more Service Engine light. I still have not wired in the Tach wire but it seems to start everytime. Where is the Tach wire location and color?
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