Engine Code 54???
Race Director
Joined: Oct 2001
Posts: 19,653
Likes: 428
From: Melbourne Florida
Cruise-In IV Veteran
Re: Engine Code 54??? (1slyder1)
Code 54 = Fuel Pump circuit (low voltage).... good luck
Sorry..didn't read enough...you are supposed to check for a short or open with an ohmeter...
[Modified by Fuzzy Dice, 9:07 AM 5/28/2004]
Sorry..didn't read enough...you are supposed to check for a short or open with an ohmeter...
[Modified by Fuzzy Dice, 9:07 AM 5/28/2004]
Burning Brakes
Joined: Apr 2004
Posts: 762
Likes: 2
From: Huntington ma
Re: Engine Code 54??? (1slyder1)
Per the Helms manual for my 85... Code 54 will set if the ECM detects less than 2 volts (for longer than 1.5 seconds) at terminal B2 since the last distributor reference pulse. Terminal B2 is connected to terminal A of the fuel pump relay, to the fuel pump itself and to the oil pressure switch. Sort of a feedback loop for the ECM, since it Turns the relay on by powering relay terminal C which connects to ECM terminal A1 (12 volt relay drive). Bottom line is that it could be a bad wire or connection (relay or ECM), bad relay, bad oil pressure switch or bad ECM itself. You need the troubleshooting schematic from the manual to sort it out (and a voltmeter, and a test light).
