87 turbo

cre · 11-30-2012, 02:29 AM

No diagnostic codes present?

ItsOthatOguy · 11-30-2012, 05:17 AM

Now that I checked it, the light doesnt come on period!!! I want to say no, but I'm not sure if the light works. Generally speaking, If there is no problem, does the check engine light come on when you turn the battery on? I also have a 1986.5 NA that does. It'll come on for a second then go off. Is it supposed to be like that in a turbo?

cre · 11-30-2012, 06:32 AM

See the thread about checking error/diagnostic codes in the MKIII FAQ section.

Yes, when the ignition is turned to the "ON" position but the engine is not running the check engine light is supposed to be on. Once the engine is turned on the light will turn off unless certain critical error conditions (very high level warnings) have been recorded. There are many problems which may cause the light to turn on only once and many others which won't trigger the check engine light at all so you should check for diagnostic codes anytime you have problems and it's a good idea to check them whenever you change the oil or even when you just check the oil while getting gas.

ItsOthatOguy · 12-01-2012, 01:20 AM

Well that right there is a problem. My CE light wont come on at all.

cre · 12-01-2012, 01:36 AM

Might want to start by replacing that bulb and then check for codes.

ItsOthatOguy · 12-18-2012, 12:42 AM

I changed all the bulbs and the check engine light doesn't come on at all. I think there's something wrong with my dash, maybe? I dont think the contact is good on the circuit for the check engine light

cre · 12-19-2012, 04:02 AM

You can clean the contacts with some very fine sand paper. I've found that more often the brass in the bulb holder is corroded. If you have a copy of the '87-'88 ECU pinout I believe pin "W" is the + output for the CEL.

11-30-2012, 02:29 AM	#1
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	No diagnostic codes present? __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

11-30-2012, 06:32 AM	#3
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	See the thread about checking error/diagnostic codes in the MKIII FAQ section. Yes, when the ignition is turned to the "ON" position but the engine is not running the check engine light is supposed to be on. Once the engine is turned on the light will turn off unless certain critical error conditions (very high level warnings) have been recorded. There are many problems which may cause the light to turn on only once and many others which won't trigger the check engine light at all so you should check for diagnostic codes anytime you have problems and it's a good idea to check them whenever you change the oil or even when you just check the oil while getting gas. __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

12-01-2012, 01:36 AM	#5
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	Might want to start by replacing that bulb and then check for codes. __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

12-19-2012, 04:02 AM	#7
cre Toyota Racing Development Join Date: Apr 2007 Posts: 5,038	You can clean the contacts with some very fine sand paper. I've found that more often the brass in the bulb holder is corroded. If you have a copy of the '87-'88 ECU pinout I believe pin "W" is the + output for the CEL. __________________ If something breaks or you need to contact a member of the administration please post HERE. Unless it's a private or administration matter please post it on the forum. It benefits no one else if car related questions aren't posted for future users and takes away from the time I'm able to spend helping on the rest of the forum. If you're so inclined I'm always more than happy to accept tips via PayPal. Tip Jar --->

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11-30-2012, 05:17 AM	#2
ItsOthatOguy Stock Join Date: Nov 2012 Location: Baton Rouge Posts: 13	Now that I checked it, the light doesnt come on period!!! I want to say no, but I'm not sure if the light works. Generally speaking, If there is no problem, does the check engine light come on when you turn the battery on? I also have a 1986.5 NA that does. It'll come on for a second then go off. Is it supposed to be like that in a turbo?

12-01-2012, 01:20 AM	#4
ItsOthatOguy Stock Join Date: Nov 2012 Location: Baton Rouge Posts: 13	Well that right there is a problem. My CE light wont come on at all.

12-18-2012, 12:42 AM	#6
ItsOthatOguy Stock Join Date: Nov 2012 Location: Baton Rouge Posts: 13	I changed all the bulbs and the check engine light doesn't come on at all. I think there's something wrong with my dash, maybe? I dont think the contact is good on the circuit for the check engine light