Test the LH2.2 and EZK117 without OBD???

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sq1euo - 03 May 2006 09:39 GMT

Hallow
One of user alt.autos.volvo has written,..that is one method to check
egnition systems in Volvo 740 witchout OBD with using the LED and connect to
same connector and observed it while driving a car. Anybody know something
about this?? How to cionnect this? and how LED must to use?

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Jarek (SQ1EUO) - V740 B230F + LPG (1988)
sq1euo@wp.pl
sq1euo@stud.pam.szczecin.pl
GG: 1277234

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User - 04 May 2006 03:27 GMT

> Hallow
> One of user alt.autos.volvo has written,..that is one method to check
> egnition systems in Volvo 740 witchout OBD with using the LED and connect to
> same connector and observed it while driving a car. Anybody know something
> about this?? How to cionnect this? and how LED must to use?

LED long leg is cathode, short leg is anode. Solder load resistor on
cathode (K) side. For automotive use 1KOhm is always safe. If you find
some peculiar LED then refer here: http://led.linear1.org/1led.wiz to
quickly calculate the load resistor value.

If you connect the + cable to the g/w wire in the other free connector,
the light will flash in a steady beat when the control unit is
successful in attaining lambda. The on-off cycle of the LED will
correspond exactly to the sweep of your volt meter.

Bob

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The goal when driving is to miss the maximum number of objects.

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