Forum Replies Created
-
Replies
-
Hey guys, just a FYI on what fixed the 93 accord D4 blinking light with no start. Turned out to be the main relay. Disassembled the main relay and parts of the circuit board (solder joints) were lightly discolored, lightly blackened. Installed a new main relay, turned key to on position, no blinking D4 light, and then started right up. What had me stumped was the blinking D4 light with no codes, so initially thought bad TCU, but that was not the case, TCU is good. I was not aware that a faulty main relay would set a blinking D4 light off. Hope this helps someone with same issue in the future, thanks.
Have not checked yet the connections, but i will. A few days ago, i removed both ECU and TCU and opened both up. Checked for leaky or burnt capacitors, but they look good. Resistors look good, and solder joints appear to be intact. Was thinking of purchasing capacitor and resistor kit and replace them.
I do have a check engine light as well. The code is 43, fuel supply or o2 sensor circuit. I was told that a leaky oil pressure swich can leak oil onto the o2 sensor connector, causing a cel light. I have verified that my oil pressure switch is in fact leaking. But have had this issue for awhile, but was still able to start and drive car.
As far as the D4 light when shorting the service connector, it just flashes in a steady continous flash, no pauses or different flash patterns, nothing like the video . And the D4 flashes the same way whether i short the service connector or not. When the igntion key is turned to the on postion, flashes in a steady continous flash as well.
All dash indicators light up normally and then turn off when i was able to start the car. I can definitely hear the main relay click when the ignition is switched to the on position.
Well, separated positive and negative cables from each other, reinstalled cables to battery, inserted fuse, and still blinking D4 with no start.
Will connect cables together and pull fuse. Will keep you posted. Thank you for your continued correspondence.
Reconnected negative cable to terminal and put fuse back in. D4 light still blinking, car will not start
Already jumped the service connector. No codes are given. No short or long blinks. Just a steady sequence of blinks constantly. As already mentioned, D4 started blinking because of a dead battery. There were no driving or shifting issues at all. Any ideas?