All those chassis are Flash Code, so just build a Homebrew $5 Led/Sw ...

No, the old OBD-I models also have codes beyond what just the LED flasher/blinker box will tell you. But you need to have a scanner that will read those codes. I'm having the same problem at the moment, trying to find a scanner which will read the old OBD-I systems with the 38-pin connector (400E / 500E).

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The LED tool does read the 38 pin diagnostic socket on OBD1.............

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A Dalton

Sorry, I should have clarified. Yes, the LED tool does read the 38-pin diagnostics. But for certain codes, it is not specific... for example, on the E-GAS module (pin 7), there are a half-dozen items that can trigger code #2. The LED just shows "code 2". The scanner will specify which of the half-dozen items actually caused code 2 to display.

That is more like it.......

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A Dalton

For those still wondering what I'm talking about, see the attached screen shot... the LED blinker just shows code 2, but with a HHT (hand held tester / scanner), you can pinpoint which of the six sub-codes caused the fault (002, 006, 007, 007, 009, or 025).

I need a scanner / code reader that will read those 3-digit DTC's on an M119 with 38-pin connector.

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The HTT is a 'poor' tool . . quote from a senior MB tech . .

This table shows that it's not an "infallible" tool for diagnosing EA problems just as a normal scanner (AST Retreiver, etc) isn't. It give ambiguous codes as the table below shows.

The sub-codes are shown (and read if at fault) in subsequent DTCs in most scanners.

So if you think the "HHT" will point to the 'culprit', you'll be dissapointed!

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