Honda Accord (1990 - 2002) Includes 1997 - 1999 Acura CL

1994 Honda Accord LX engine and transmission code

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Old Nov 13, 2018 | 05:35 PM
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Ryan Haines's Avatar
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Default 1994 Honda Accord LX engine and transmission code

I have a transmission code (code 14) on my 94 Accord. What is this? The car will drive for a few minutes then the D4 light will start flashing, then in a few seconds the car will stall out and die.

I also have engine code 21 showing. I know this is for the VTEC control solenoid. I have replaced the whole spool valve assembly, including the solenoid. So there should not be a code showing for that one. Any idea as to why it would still be showing this code, after the part has been replaced?

My father in law suggested maybe the coil going bad being the cause of the car dying. But I'm not sure about that either.

Any help is appreciated.
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Old Nov 15, 2018 | 03:49 AM
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Default Re: 1994 Honda Accord LX engine and transmission code

https://honda-tech.com/forums/honda-...codes-3297127/
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Old Nov 21, 2018 | 09:16 AM
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Default Re: 1994 Honda Accord LX engine and transmission code

I know what both the codes are. I am asking why would code 21 still showing after the VTech solenoid and spool valve have been changed and the computer reset.

My fuel pump relay needs to be replaced, and I have a resistor on my ecu that seems to be bad. Would this maybe have anything to do with it?
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Old Nov 23, 2018 | 10:51 AM
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Default Re: 1994 Honda Accord LX engine and transmission code

Originally Posted by Ryan Haines
I have a transmission code (code 14) on my 94 Accord. What is this? The car will drive for a few minutes then the D4 light will start flashing, then in a few seconds the car will stall out and die.
FAS wire, this is the communication wire between ECU & TCU. Intermittent or no communication will cause erratic shifting or limp mode of the transmission. Check D16 BRN/WHT wire for damage or faulty/corroded/loose pins.
Originally Posted by Ryan Haines
I also have engine code 21 showing. I know this is for the VTEC control solenoid. I have replaced the whole spool valve assembly, including the solenoid. So there should not be a code showing for that one. Any idea as to why it would still be showing this code, after the part has been replaced?
Don't throw parts when a fault occurs. Check the wiring and do proper diagnostics first.
If there was any recent work done near the ECU/TCU before these codes appeared, check that area first.
You need to check that the wiring is undamaged.
Verify the harness connector to the solenoid is not damaged/corroded or loose.
With solenoid disconnected, check for continuity between solenoid and body ground(should be 14-30Ω) if not solenoid should be replaced.
If OK move on to harness.
Check continuity between VTEC harness solenoid connector and A4 pin on ECU connector.
If no continuity check the ORG/YEL wire for damge, repair/replace if need be.
If yes, check for continuity between Solenoid harness connector and body ground
If yes, repair GRN/YEL wire between A4 and VTEC solenoid connector.
If no find a known good ECU to test with.

If both problems showed up at the same time, check your harness for any damage or recent work done to the car.
Check your main grounds, bonding jumpers and battery terminal connections are clean and tight.
When the engine dies does the dash also go dark or does the engine simply cut out and then the lights come up on the gauge cluster?
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Old Nov 25, 2018 | 09:17 AM
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Default Re: 1994 Honda Accord LX engine and transmission code

I will start checking wires. When the engine dies, it stalls out and the dash stays lit up. Only the transmission light starts to blink. It doesn't blink out a code, just the D4 light comes on with a steady flash. The engine will run for about 5 minutes max and then the fuel pump relay starts clicking intermittently, the r.p.m.'s will dip a little, then it dies.
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Old Dec 1, 2018 | 10:50 AM
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Default Re: 1994 Honda Accord LX engine and transmission code

FAS wire, this is the communication wire between ECU & TCU. Intermittent or no communication will cause erratic shifting or limp mode of the transmission. Check D16 BRN/WHT wire for damage or faulty/corroded/loose pins.

Don't throw parts when a fault occurs. Check the wiring and do proper diagnostics first.
If there was any recent work done near the ECU/TCU before these codes appeared, check that area first.
You need to check that the wiring is undamaged.
Verify the harness connector to the solenoid is not damaged/corroded or loose.
With solenoid disconnected, check for continuity between solenoid and body ground(should be 14-30Ω) if not solenoid should be replaced.
If OK move on to harness.
Check continuity between VTEC harness solenoid connector and A4 pin on ECU connector.
If no continuity check the ORG/YEL wire for damge, repair/replace if need be.
If yes, check for continuity between Solenoid harness connector and body ground
If yes, repair GRN/YEL wire between A4 and VTEC solenoid connector.
If no find a known good ECU to test with.

If both problems showed up at the same time, check your harness for any damage or recent work done to the car.
Check your main grounds, bonding jumpers and battery terminal connections are clean and tight.
When the engine dies does the dash also go dark or does the engine simply cut out and then the lights come up on the gauge cluster?
I have multiple capacitors, at least I think they are, that seem to be bad. They have sticky black stuff around them on the board of my ECU. If they are indeed bad how will I know? And would this be a possible cause?


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Old Dec 2, 2018 | 02:43 AM
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Default Re: 1994 Honda Accord LX engine and transmission code

you need to replace the ecu. It looks like the electrolyte from the caps has seriously ruined several traces. Make sure your replacement doesn't have this issue.
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Old Dec 2, 2018 | 03:39 AM
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Default Re: 1994 Honda Accord LX engine and transmission code

Originally Posted by angrysmileyface
you need to replace the ecu. It looks like the electrolyte from the caps has seriously ruined several traces. Make sure your replacement doesn't have this issue.
Could this also affect the tcu, or cause a transmission code to be thrown? I have checked the tcu board and it in good shape. The code it's throwing is code 14 (linear control solenoid). I have checked the communication wire between the ECU/TCU and its solid, no bare spots and the pins and connectors are good as well.
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