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Newbie learns about reading fault codes
I'm learning about fault codes and how to get them to light up.
My first attempt didn't work because I tried using a standard 12V circuit
tester. (2 wires with a little light bulb inside a plastic handle). No
Off to Radio Shack, with the printout from Scott's website in hand to buy an
LED and resistor. I was hoping I wouldn't have to buy them separately and
solder them together. Hooray, there was a wall full of LEDs, all with built
I had no idea if the milliamps (mA) mattered, and neither did the Radio Shack
sales person. I closed my eyes and pointed to a red LED assembly 15mA, p/n
Back home, eager to start the test, I used some Micro-Clip Test Jumpers I
picked up at Radio Shack to activate the fault code system ($4.99). No luck.
A bent paper clip worked better ($0.00)!
Connected up my LED, and look... Flashing Red Lights! And, its a recognizable
pattern. On/off On/off On/off On/off and so it went. Was I seeing code 4444
(= bad ECU), or was I seeing the readout for: "last error code?"
I don't know!!!! Arghhhhh.....
Next, I jumped the two connectors to step up to the next fault code, but now,
no lights at all. What a dilemma. But, I'm a lot closer to success tonight
than I was yesterday!
For new Q-listers or lurkers, check out: teleport.com/~scottmo/index.html.
It's a fantastic resource for chips and technical help.