 Swapped wiring problem, Cant get the CEL to come on |
 Oct 20, 2006 - 2:50 AM
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 Enthusiast  Joined Jan 13, '06 From UnderTheGround403 Currently Offline Reputation: 2 (100%)  |
I have a thread in the electrical sub-forum, but figured my problem is swap-wiring related.
Im trying to pull some codes from the ECU and I cant get the CEL to come on. The bulb is not burnt and the cluster itself is good so Ive narrowed it down to a problem in the cars wiring, somewhere. There are 2 other lights that dont come on (cruise and oil) but am not worried about these. I was told the cruise works but havent actually tried it yet, and there is an oil pressure gauge hooked up. No big deal. The one I need is the CEL... Can anyone tell me if there is another way to pull codes w/o using the CEL or Is there another way to get the CEL to come on Sorry for all the confusion |
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Oct 27, 2006 - 8:01 PM
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 Enthusiast Joined Mar 31, '04 From Summerville, SC Currently Offline Reputation: 5 (100%) |
WOAH hold up. The W in the diagnostic block has power coming to it, it needs to be GROUNDED, not jumped to +B which is positive power. The ECU ground the W circuit when it needs to turn the CEL on, power comes down from the 15amp guage fuse (usually) and then to the light, then to the ECU and the diagnostic terminal.
-Doc -------------------- -Dr Tweak, 6GC's resident engine swap wiring expert extraordinaire Click here to see my swaps drtweak@phoenixtuning.com |
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Oct 27, 2006 - 11:32 PM
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 Enthusiast Joined Oct 10, '03 From Wichita, KS Currently Offline Reputation: 5 (100%) |
QUOTE(Dr_Tweak @ Oct 27, 2006 - 8:01 PM) [snapback]496921[/snapback] WOAH hold up. The W in the diagnostic block has power coming to it, it needs to be GROUNDED, not jumped to +B which is positive power. The ECU ground the W circuit when it needs to turn the CEL on, power comes down from the 15amp guage fuse (usually) and then to the light, then to the ECU and the diagnostic terminal. -Doc His CEL isn't working... so W won't have any power coming to it, that is why he is simulating the CEL with a test light between +B and W just like the original circuit... +12V to bulb then on to ECU pin W which is ground for the circuit when the CEL is on. If he just put a test light between W and chassis ground the light would stay lit constantly even if the ECU was trying to display codes. --------------------  Project ST204.5 99.88946% complete... |
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Oct 28, 2006 - 12:15 AM
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Enthusiast Joined Mar 31, '04 From Summerville, SC Currently Offline Reputation: 5 (100%) |
QUOTE(WannabeGT4 @ Oct 28, 2006 - 4:32 AM) [snapback]496960[/snapback] QUOTE(Dr_Tweak @ Oct 27, 2006 - 8:01 PM) [snapback]496921[/snapback] WOAH hold up. The W in the diagnostic block has power coming to it, it needs to be GROUNDED, not jumped to +B which is positive power. The ECU ground the W circuit when it needs to turn the CEL on, power comes down from the 15amp guage fuse (usually) and then to the light, then to the ECU and the diagnostic terminal. -Doc His CEL isn't working... so W won't have any power coming to it, that is why he is simulating the CEL with a test light between +B and W just like the original circuit... +12V to bulb then on to ECU pin W which is ground for the circuit when the CEL is on. If he just put a test light between W and chassis ground the light would stay lit constantly even if the ECU was trying to display codes. He tried that and it didn't work. Is the CEL not working because the ECU isn't turning it on, or because the light isn't working? Does the CEL come on when you ground the W pin? -Doc This post has been edited by Dr_Tweak: Oct 28, 2006 - 12:18 AM -------------------- -Dr Tweak, 6GC's resident engine swap wiring expert extraordinaire Click here to see my swaps drtweak@phoenixtuning.com |
Posts in this topic
6gsillyca Swapped wiring problem Oct 20, 2006 - 2:50 AM
lagos who did your harness? Oct 20, 2006 - 3:15 AM Batman722 Art, he has jgreening's former car.
http://ww... Oct 20, 2006 - 9:06 AM WannabeGT4 Jamasco did the wiring. Oct 20, 2006 - 10:33 AM WannabeGT4 To do this without the CEL of the combonation mete... Oct 20, 2006 - 11:00 AM 6gsillyca QUOTE To do this without the CEL of the combonatio... Oct 20, 2006 - 11:51 AM jgreening QUOTE(6gsillyca @ Oct 20, 2006 - 2:5... Oct 24, 2006 - 12:13 PM 6gsillyca Where on the end neds to be puched back in? Oct 25, 2006 - 1:12 AM
jgreening QUOTE(6gsillyca @ Oct 25, 2006 - 1:1... Oct 25, 2006 - 5:14 PM 6gsillyca Ok, when I pick her up from the shop ill do that. ... Oct 26, 2006 - 12:42 AM jgreening QUOTE(6gsillyca @ Oct 26, 2006 - 12... Oct 26, 2006 - 11:12 AM 6gsillyca QUOTE(jgreening @ Oct 26, 2006 - 10... Oct 27, 2006 - 12:42 AM 6gsillyca Back to original topic:
I tried what Wannabe said... Oct 27, 2006 - 1:05 AM WannabeGT4 Have you asked Jay about how to check codes? I... Oct 27, 2006 - 10:34 AM 6gsillyca I am asking him, but figured I would post here, ju... Oct 27, 2006 - 11:24 AM WannabeGT4 QUOTE(6gsillyca @ Oct 27, 2006 - 11... Oct 27, 2006 - 1:29 PM 6gsillyca Yes, thank you. I do have a 93 mr2 ecu. if it matt... Oct 27, 2006 - 7:53 PM 6gsillyca So to pull a code, Id need to bridge e1 and te1 w/... Oct 27, 2006 - 8:22 PM WannabeGT4 OK. Bridge TE1 and E1 (labeled in red) and then pu... Oct 27, 2006 - 11:58 PM WannabeGT4 ... Oct 28, 2006 - 12:03 AM WannabeGT4 Like he said, the bulb is fine and the cluster has... Oct 28, 2006 - 12:20 AM |
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