Hi guys, first post here. Great forum.

My daughter's 1993 10th Anniversary Accord just died and won't start. It has good spark and the fuel is getting to the rail but the injectors are not firing. It is throwing two codes:

31 - Auto Tranny B-Signal
54 - Crank Fluctuation Sensor (Does it even have CKF?)

Here's what I replaced before it died:

Main Relay
Ignition switch
Distributor, rotor, wires, spark plugs
Ignitor
Fuel filter

Any help would be appreciated with this problem.

 

Check all your fuses.

 

All fuses are good.

Does the 10th Anniversary have the Crank Fluctuation Sensor? All I can find is that the sensor was put on Hondas first time in MY1994.

 

so such thing as a CKF in accords through 2002. in 1996 it appeared in civics and integras though.

why was the distributor replaced? was it replaced with a brand new unit?

 

I figured it out. It's the TPS. I am getting new one tomorrow. Do I have to calibrate it or it is just straight plug in thing?

Anybody have step by step for throttle body removal since the access to the TPS is a PITA. Might as well clean the TB.

v4lu3s

Any ideas why is the ECU throwing the 54 DTC since there is no CFS? Any idea on the 31 DTC Auto Trans B-Signal?

I changed the ignition parts with new parts when I had the valve train off fixing the spark plug well oil problem due to hardened seals. After valve adjustment and the new ignition parts the car ran like a champ until this TPS problem reared it's ugly head.

 

for the tb just take the throttle cable off, then the intake tube, then unplug the sensors. the nuts/bolts holding it on take a 12mm socket. get a new throttle body gasket before you take it off, the old one tends to crack. then use a dremel and cut grooves in the headless screws on the TPS, then unscrew it and put the new one on, i believe it needs to be calibrated for .45v closed and 4.5 open.

no clue why you are getting a code 54, only suggestion i have is that you are misreading it. your distributor has a tdc ckp and cyp sensors, there is no code in the ecu for a ckf sensor or ckf sensor code. If the didstributor had not failed i dont understand why you would replace it...

as far as the auto trans one of the sensors is either disconnected, bad or getting a bad signal.

 

Thanks for your help, will get that gasket.

As for the codes. The sequence is 5 short, 4 long and then 3 short and 1 long. If it's not 54 and instead it's 5 and 4 would it not be 5 short and then 4 short?

 

Im so Lost hahaha im trying to find a treath of how to read the cel codes.

 

pretty sure you got a code 15 and a code 43...

short are single digits, long are tens.
so 1 long 5 short is 15, which is ignition output signal, check all your wiring related to the distributor, something is most likely wired wrong or something is defective.

code 43 is a fuel system issue, check for vacuum leaks and make sure fuel pressure is good.

 

Does the CEL light come on as usual and then goes off and then the codes start flashing, or do the codes flash right away when you have the diagnostic port shorted?

If it reads the code right away then I have 1 long -> 5 short -> 4 long -> 3 short -> 1 long. Does the last 1 long count as 10?

Secondary I disconnected the TPS and the car runs with only slight fluctuation at idle.

I did check the fuel pressure and it's good so it may just be stored code from before the fuel filter was replaced.

I do appreciate your help will replace the TPS check the vacuum lines and report back. Have a nice evening.

 

sounds like you got it going. when i read the flashes i usually let it cycle through four or five times to make sure. I am used to the flashing having had hondas since 1996 (84 accord, 92 accord wagon, 88 accord hatch, 94 civic, 93 civic, 99 prelude, 89 crx, 89 crx), but even then i still double and triple check myself.

a single long flash is 10....normally if you are watching the dash as the light first comes on (when checking the flashes) it will start with the lowest number. if it starts with a long flash then yes its a 10, 4 long flashes would be a 40, etc. having said all that, i watch and look for the lowest number and start from there.

you may also want to clear the codes, and try and restart it, and if it does not start crank it until a code shows again.