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#1
08-02-2008, 01:37 PM
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Code Reader Problems
I have a 93 E320 Wagon and have never been able to pull codes off it.
The push button on the reader in the car is non functional. I noticed that all the wires under it have had a minor amount of insulation cut away as if the PO's were troubleshooting this at one time. I cannot find any wiring diagrams of this unit and am looking for any suggestions on how to start. I have already built a reader (A Dalton design) and cannot get that to function as well.
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Brian G. 1994 E320 Wagon with many warts SOLD 1995 E320 Wagon with a beauty mark or two FOR SALE 
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#2
08-02-2008, 01:44 PM
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Test #1`
Do you have 12 v at diagnostic connector socket #16 [ test from #16 to battery neg w/key ON If NO, change fuse #9..................
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A Dalton Last edited by Arthur Dalton; 08-02-2008 at 02:07 PM.
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#3
08-02-2008, 02:54 PM
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Test 1 Result
Voltage measured at Connector 16 w/ key on. I will need to recheck becuase the meter I used is a 0-50 span and it looked just under 10V. Once I dig out the better meter, I will report. I retried the push button since I had not done so after putting dielectric grease on all the fuese after fixing my aux fans. Still no pulsing from the LED.
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Brian G. 1994 E320 Wagon with many warts SOLD 1995 E320 Wagon with a beauty mark or two FOR SALE
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#4
08-02-2008, 03:02 PM
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Test the tool u built accoss the battery:
test 1- Red on + , yl on neg...led should light test 2- Red on pos, blk on neg...led should light when the button is pressed.
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A Dalton
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#5
08-02-2008, 03:38 PM
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Hand reader ok - Red to battery, yellow to ground - LED lit
Red to battery, black to ground, button pressed - led lit I did have a blown fuse in the hand reader. D
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Brian G. 1994 E320 Wagon with many warts SOLD 1995 E320 Wagon with a beauty mark or two FOR SALE
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#6
08-02-2008, 04:05 PM
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Cool..
You would be surprized at how many do not know the tool is polarity sensitive when they make it..which is why I have +/- indications on the plan........ What do you have at pins 8 and 14??
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A Dalton
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#7
08-02-2008, 05:25 PM
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OK - the car's default reader is DOA - can't seem to get the LED to respond.
Got codes with the hand reader. Pulled and cleared - drove around, then pulled and cleared again. Here they are First Run Pin 6 - 2 and 8 Pin 8 - 4, 25,33,42,49 Pin 14 - 2,5,11 - 5 would NOT clear Took car for ~30 min drive Pin 6 - 8 Pin 8 - 4, 25, 28, 33, 42 Pin 14 - 5,11 5 still won't clear. Ran pin 7 as well Pin 7 - 1 pin 10 would not respond
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Brian G. 1994 E320 Wagon with many warts SOLD 1995 E320 Wagon with a beauty mark or two FOR SALE
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