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| Red 1990 Volvo 240 |
How to read codes from ECM on 1990 Volvo 240? The check engine light
came and the car is not running properly, but it is still functional. I
know where the code reader is but not sure how to read it. I have a Haynes manual with codes, but not sure exactly. Thanks
Answer: Remove the cap from the diagnostic
connector, the letter A should be on the connector. In the cap removed
is a wire, plug the wire in to terminal #2, turn key to position 2 (key
on, engine off) push the button next to the letter A for 2 seconds.
Watch the red light, it will flash out a 3 digit code, there will be a
slight pause between the numbers (example:1-2-1 =
flash,pause,flash,flash,pause,flash). After the 3 digit code has been displayed press the button again, to retrieve other codes, repeat until codes repeat themselves to make sure you read all of them. The code 1-1-1 is no codes. Also you will have to do the same process for terminal #6 (#2 and #6 are fuel and ignition systems).
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