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Post by justyrick on Mar 5, 2010 20:43:14 GMT -5
Hello all, I have searched but cannot find how to reset the check engine light on my 1987 Justy. Please help. Thanks in advance, Rick
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Post by RedRooJusty on Mar 5, 2010 21:15:16 GMT -5
**justyrick**, welcome to this forum Clearing Codes Codes will only clear when the faulty system or circuit has been repaired. After making the repairs, codes can be cleared by connecting 2 pairs of connectors, the "Self-diagnostic" connectors and the "Read Memory" connectors that are usually to the right of the diagnostic connectors. -Start with a warmed up engine -Turn off the engine -Connect both pairs of connectors -Finally start the engine -This should clear the codes. Here is an image for reference as well Reset Fault Codes To return to normal operating mode, just disconnect both sets of connectors. -RRJ
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Post by justyrick on Mar 5, 2010 23:34:36 GMT -5
very cool, will try tomorrow
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Post by justyrick on Mar 8, 2010 23:00:58 GMT -5
I tried today to reset, but I only have the green connectors and they were plugged into each other. No black connectors. Any advise would be greatly appreciated. Thanks, Rick
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Post by RedRooJusty on Mar 9, 2010 13:38:19 GMT -5
I do not own a Gen-1, but I checked the 87' schematic and it does show the (black) "memory read" connectors are supposed to be there. If your wiring looks anything like mine (pictured previously), then the black connectors could be tangled up and out of site, like a previous owner though they had to tucked up out of the way (not necessary by the way, let 'em hang for future maintenance and troubleshooting).
If either set of connectors (black, green, or both) is connected together the check engine light will continuously flash a specific sequence depending on the mode.
Disconnect the green connectors and the black connectors to return to "normal" FCU/ECU operation (this is also the only mode in which the "Check Engine" light will go out, pending you have fixed the fault condition).
-RRJ
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Post by justyrick on Mar 10, 2010 20:32:22 GMT -5
Hello all, here are my connectors in my 05/87 Justy. Different from everything I have seen. Please help, I need to smog soon and I believe I have fixed the problem. Thanks in advance, Rick Attachments:
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Post by RedRooJusty on Mar 12, 2010 18:03:40 GMT -5
Odd indeed, that Orange connector is under the hood (by the brake master) for us Gen-2 guys. You got me, I have PM'd a few of the more experienced Gen-1 forum members for your assistance.
Hopefully you get an answer soon. -RRJ
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Post by justyrick on Mar 15, 2010 10:16:03 GMT -5
Hello redroojusty, any word yet on the reset light problem?
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Post by RedRooJusty on Mar 15, 2010 11:41:40 GMT -5
I looked at three pick-lots this weekend, keeping an eye out for a Gen-1. I am still waiting for any Gen-1 owner to chime in and help.
I will keep inquiring. -RRJ
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Danimal
Getting my two Justys back together after a Justy hiatus.
Posts: 589
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Post by Danimal on Mar 15, 2010 15:36:35 GMT -5
Yes, I was solicited by **RedRooJusty**. I'd've logged in to reply anyway had I had the time to get up‒side‒down in me Justys to see the bloody connectors. I have three GenIs and found each to be different. My second Justy is an '87 FWD and has only the two green connectors hanging down but a black connector taped up tightly to the wiring behind the dashboard. I found nothing to which it may connect. My third Justy is my daily driver and an '88 4WD. It has both of each colour connector. My fourth Justy is an '88 FWD and has both green connectors but only one black connector which is hanging from the ECU side of the would‒be connection. I can't be sure that the original wiring is all present because there are clearly many additions. I'll open that can of worms later and maybe find more about the connectors. Which trouble code are you getting JustyRick? If the check engine light is on then the computer ought to be blinking out the trouble code without you having to connect anything. Just look for the flashing light on the computer. Never have I plugged together anything; the light in the dash goes out and the computer's light quits blinking when the fault is corrected. Danimal
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Post by justyrick on Mar 15, 2010 20:26:13 GMT -5
Thanks for the response. The problem seems to be the Ignition pulse system/crank angle sensor. Where do I find that part?
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Post by RedRooJusty on Mar 15, 2010 21:23:29 GMT -5
guilty.. (snickers a bit)**Danimal**, as always you are right-on. I am usually too impatient to let the "check engine light" extinguish on it's own, heck I wasn't sure that it would. Thank you for going through the fun of inversion on multiple justys. **justyrick**, I believe you are looking to the distributor for the crank angle sense (code 13). It looks as if the 87' distributor wiring goes to the ignition module next, then the ignition module reports the fault to the FCU. Pay special attention to the distributor connector for broken wires, recessed pins, and or corrosion. --side note-- Only on the 87-88 justy does the distributor wiring go into the ignition module, the 89-94 (carburetor) justys have the distributor wiring going to the FCU directly.-RRJ
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Post by justyrick on Mar 17, 2010 18:50:23 GMT -5
Hello all, I read the check engine light wrong. It is a code 23, O2 sensor circuit. I have a brand new sensor in, from Bosch. Still a code 23. Could a new one be bad?
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Post by RedRooJusty on Mar 18, 2010 1:49:19 GMT -5
Hello all, I read the check engine light wrong. It is a code 23, O2 sensor circuit. I have a brand new sensor in, from Bosch. Still a code 23. Could a new one be bad? Is this a "crimp-in" universal, or a direct replacement (with harness connector)? If a crimp-in I would check the crimp integrity first, then move to the harness connector. Stupid question, did you buy a wide or narrow-band O2 sensor? The Justy should have a single-wire "narrow-band" O2 sensor as OEM, a wide-band O2 sensor would confuse the ECU. -RRJ
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Post by RedRooJusty on Mar 18, 2010 1:51:01 GMT -5
I thought I would post the 88 engine schematic I have been going from:
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Post by justyrick on Mar 18, 2010 10:13:31 GMT -5
Thank you for the schematic. The O2 sensor is a direct fit, single wire.
My shift light never goes on or my charging battery light. The wiring harness is beautiful and has never been spliced. I t looks like there must be a couple of breaks some where. Time to start taking this apart.
Any advise would be greatly appreciated. Thanks in advance.
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Post by RedRooJusty on Mar 18, 2010 16:38:41 GMT -5
My shift light never goes on or my charging battery light. The wiring harness is beautiful and has never been spliced. I t looks like there must be a couple of breaks some where. Time to start taking this apart. Any advise would be greatly appreciated. Thanks in advance. The battery-charge light (like all essential warning lights) should self-check when you first turn the Ignition on. Might just be a bulb out. I am not sure about the shift light. -RRJ
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Post by justyrick on Mar 18, 2010 20:43:13 GMT -5
The light does not self check and the bulb is good. Very odd. Also the wire from the O2 sensor to the ECU is good. I am at a lost. I'm good at troubleshooting, but I don't know what to do. The new muffler comes tomorrow and I will see if it will pass smog. If it doesn't, I might have to get rid of it. Very sad
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Post by RedRooJusty on Mar 19, 2010 1:16:14 GMT -5
The charge indicator lamp is the white/red wire off the the alternator. The EFCU controls the shift lamp. -RRJ
--update-- **justyrick** I sent you a Personal Message with more details
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Post by justyrick on Mar 21, 2010 12:56:20 GMT -5
Well the charge light was an easy fix. The plug had come out of the alternator. Light works great. The shop I bought the O2 sensor gave me a new one and my muffler came in. Will put it all together and see what happens. I am very excited. Will let you all know the outcome
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