D4 light flashing on 96 honda prelude

First things first. Check the fluid level and condition. (Honda's are always checked engine off, sitting level.) If the fluid is burnt/stinky and dark, you may have internal a/t issues. Next step would be pull the codes. You're gonna have a P0700 code under the engine list. That is the generic trans system failure code. Your scan tool will need to be able to read all powertrain systems, not just engine data. If it has a specific code for, say one of the shift solenoids, or the linear solenoid, you may be able to replace parts/fluid and be ok. If it has a P0730, or P0740 code, then you're looking at internal clutch pack failure, and a reman. or good used trans. Good luck.

d4 light indicates electronic transmission failure but this can b as simple as low transmission or old fluid . change fluid if its dark or watery, before you panic.(( use only honda brand atf,)) if that doesnt work the codes need to b considered this can b done by jumping the two pin connector under or behind the glovebox with a paper clip the d4 light will flash once you turn the ignition on to first position' when dash lights first come on . it will flash then stop then flash again you need to count the first and second separately this will give you 2 diget code look it up exp; honda d4 dtc 34 just say google it , but if i were to guess if not the trans fluid the codes will b for sift selinoids easy fix but no fun to change. good luck. you will need a scanner for the check engine light uncommon for both to show up at the same time two diffrent systems ,disconnect the battery for 30second this will reset the ecm, it maybe a false code and it may not return.

3s, humm...... what is that, google shows ZERO for that.
can i know what object shows that? dash, ECU, trans shift.? what?
where are your eyes looking,?
is this the ECU flash code>? LED? at ECU?

"1985-91 Prelude models, there is only one LED display."
ECU code 3 is bad MAP (or bad vacuum to it)

Carb engine or EFI engine./ and which engine?> "options"

here is the FSM , look it up , gen 2 to 5
http://hondatech.info/downloads/Auto/Manuals/Prelude/

This is a fault code in the trans. One solution is ti disconnect tge bsttery fir 10 to 15 minutes this will reset the trans. Control unit. If thus does not work it could need a rebuild.

The D4 light is a transmission code light for those cars probbly reading the speedometer going out and the check engine light the same. Have the codes checked or simply replace it. Here is one of many places to find it (just to give you a price range) http://www.bing.com/shopping/search?q=92%20prelude%20speedomotor&qpvt=92+prelude+speedomotor     best of luck

If the drive light flashes there COULD be a trans problem. The Ck Engine light and the D4 light are on for the same reason. Take it to a qualified repair shop to have it checked out. Find a shop that regularly works on HONDA and not some chain store operation.

Try changing the Transmission oil - can solve a host of problems, including rough changes.

run it on d4

rate me FIXYA!...thanks

Try to find the speedo-cable from the firewall down the the transmission. Usually on auto trannys the speedo head (the signal generator which is a gear basicly) is located on the top of the tranny, of course attached to the speedo cable. If it's a 'drive by wire' car and there's no cable - it will require more investigation.