Question about 1994 Acura Legend

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Flashes "D4" and speedometer shows 0 MPH while driving

I have a 1994 Acura Legend that the gear display panel flashes "D4" and the speedometer shows 0 MPH while I'm driving. The manual says that indicates a transmission problem, but i'm curious about the specifics. Any ideas? Thanks

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  • Renee Vong Oct 21, 2008

    Flashes "D4" and speedometer shows 0 MPH while driving

  • ssheil3 Mar 31, 2009

    Flashes "D4" and speedometer shows 0 mph while driving. Is there anything else wrong with the trans. other than the speed sensor being bad?

  • Anonymous Mar 19, 2014

    I dont know if i have to drive it in D5 or D4 can anyone help me?

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  • Master
  • 360 Answers

This sounds like a Transmission Speed Sensor. ive done about 20 of them , common on hondas

Posted on Sep 30, 2008

  • Jimmy
    Jimmy Oct 13, 2008

    did ya get it fixed?

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1994 legend speedometer works once in a while


92 or 94?
is fuse 22 loose?
did the CEL lamp in dash glow at this FAILURE event
or S, D or D4 auto tranny lamps flash? BINGO,

did you look for ECU/PCM errors first.? that be first .
is the odometer dead? too, at same time?
on this car the VSS module (veh.speed sensor)
sends the speed data to 6 other modules. the speedometer is 1.
so of the other 5 are dead, its the VSS dead, if not its a bad speedometer.
on of those modules is the PCM, that runs the EFI engine.
so scan it, on this old car, you insert the diagnostic jumper
(service check conn.)
and read the flash codes from the CEL lamp in the dash.
this will show 17 error, VSS bad. if bad (its bad or bad conn)
easy huh?

log in to alldata.com and read the how to read OBD1 codes
it will be something like this. (photos missing)
When a fault is noted, the ECU (otherwise known as the ECM) stores an identifying code and illuminates the CHECK ENGINE light. The code will remain in memory until cleared; the dashboard warning lamp may not illuminate during the next ignition cycle if the fault is no longer present. Not all faults noted by the ECU will trigger the dashboard warning lamp although the fault code will be set in memory. For this reason, troubleshooting should be based on the presence of stored codes, not the illumination of the warning lamp while the car is operating.
All models are equipped with a service connector in side the cabin of the vehicle. If the service connector is jumped, the CHECK ENGINE lamp will display the stored codes in the same fashion.
The 2-pin service connector is located under the extreme right dashboard on Integra, Legend & 2.5TL; on Vigor models, it is found behind the right side of the center console well under the dashboard.
Codes 1-9 are indicated by a series of short flashes; two-digit codes use a number of long flashes for the first digit followed by the appropriate number of short flashes. For example, Code 43 would be indicated by 4 long flashes followed by 3 short flashes. Codes are separated by a longer pause between transaxles. The position of the codes during output can be helpful in diagnostic work. Multiple codes transmitted in isolated order indicate unique occurrences; a display of showing 1-1-1-pause-9-9-9 indicates two problems or problems occurring at different times. An alternating display, such as 1-9-1-9-1, indicates simultaneous occurrences of the faults.
When counting flashes to determine codes, a code not valid for the vehicle may be found. In this case, first recount the flashes to confirm an accurate count. If necessary, turn the ignition switch OFF, then recycle the system and begin the count again. If the Code is not valid for the vehicle, the ECU must be replaced.
and this warning
On vehicles with automatic transaxles, the S, D or D4 lamp may flash with the CHECK ENGINE lamp if certain codes are stored. For Legend this may occur with Codes 6, 7 or 17. On Vigor and Integra it may occur with codes 6, 7 or 13. In addition, the TCS lamp on NSX may flash with codes 3, 5, 6,13,15,16,17, 35 or 36. In all cases, proceed with the diagnosis based on the engine code shown. After repairs, recheck the lamp. If the additional warning lamp is still lit, proceed with diagnosis for that system.

Sep 19, 2013 | 1992 Acura Legend

1 Answer

The D4 light flashes and the speedometer goes back and forth while driving what causes this


the speedometer itself is in the transmission, so the d4 is telling you there is a code, which apperantely is your speedometer. if you could state your car model and year, i can post instructions on how to change it.

Jun 24, 2011 | Honda Odyssey Cars & Trucks

1 Answer

D4 light flashing, speed off by 10 and check engine light is on....1994 acura legend


When my D4 light started blinking means VSS (Vehicle Speed Sensor) or Trans wrong: DIY Transmission Service (Filter + Drain)

Hope helps.

May 23, 2011 | 1994 Acura Legend

1 Answer

D4 is blinking when i drive 1991 acura legend L.


Hi Gregory:

This is an internal transmission failure the check engine light along with the D4 light flashing and the slipping is telling you this. What happens is the clutches internal in the transmission fail and no longer hold pressure and cause the transmission to fail triggering the check engine and D4 light.


Hope this helps.

Jan 24, 2011 | Acura Legend Cars & Trucks

1 Answer

Car keeps running hot even after I put a new thermostat in it and the speedometer works only sometimes and when it stops working, the D4 is flashing on the gear indicator


You have to bleed all the air out of the radiator by letting the engine run until it gets hot, as it does this you will see lots of air coming out of the radiator, almost gurgling, keep the radiator coolant filled as it does this until all the air is out and it stops gurgling. It should be fine then and not overheat unless something else is wrong.

Apr 03, 2010 | 1994 Acura Legend

2 Answers

My 91 Legend idles funny when I start it up it will rev high or maybe it will rev low and stall. Also the engine light will come on and the green square around my D4 indicating my transmission position...


the port is probably under your steering wheel, like above where your feet and legs sit. you need an OBD1 (on board diagnostic) scanner. Some places do it free, some charge, or you can buy the cheaper one at auto zone for like 50 bucks. or the nice one for like 300. call around and see who will do it for free :)

Mar 11, 2010 | 1991 Acura Legend

2 Answers

89 acura legend check engine light is always on


IF YOU LOOK UNDER DRIVERS SEAT FROM BACK PASSENGER SEAT YOU'LL SEE THE CARS ECU IS MOUNTED THERE. THERE WILL BE A SMALL LITTLE "WINDOW"ON BACK EDGE THAT WHEN YOU TURN THE KEY INTO THE ON POSITION ANY TROUBLE CODES WILL CAUSE A RED LIGHT TO BLINK IS THIS WINDOW. THE SERIES OF FLASHES(LONG FLASH=10 SHORT=1) WHICH TRANSLATE INTO DTC . EXAMPLE TWO LONGS FOLLOWED BY 3 SHORTS ==DTC 23. IF THERE ARE MORE THAN ONE DTC STORED THERE WILL BE LONG PAUSE BETWEEN EACH SERIES OF FLASHES

Jun 18, 2009 | 1994 Acura Legend

1 Answer

Where is plug for check engine light? 1994 acura Legend


IT IS LOCATED BEHIND THE GLOVEBOX. JUMP THE CONNECTOR AND COUNT THE FLASHES OF THE CHECK ENGINE LIGHT. HOPE THIS HELPS, LET ME KNOW. BEST OF LUCK TO YOU.

Apr 29, 2009 | 1994 Acura Legend

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