ecu from Astra ld with 10 pin obd1 connector

[Holden202T]

yeah if you haven't already got it you need to wire in the check engine light so when you jumper the diagnostic link it will flash the light.

[festy]

The CEL should be connected between 12v ignition (pink wire/pin H on the obd connector) and pin A5 (blue/red) which is pin E on the OBD connector.
A 10k resistor between the diag request line (A9/brown) and earth will start flashing out the codes. On the OBD port they're A and B.
Long flashes are tens, short flashes are ones so a code of 24 would be two long flashes and 4 short flashes.

[Brent84]

Thanks everyone. I'll give it a try . Do you have to use the resistor . Can u just use a peice of
Wire . I spoke to a tuner today and he said use a peice of wire

[VL400]

Yeah for the CEL to flash its a wire link to ground the diagnostic enable wire. A 10K resistor gets it spitting data out if you have a laptop/scantool and a memcal that supports 160baud comms.

[festy]

I'll take your word for it - when I recently wired up my CEL I used a resistor to flash the codes, didn't even think to try a wire link!

[Holden202T]

yeah i normally just get a paper clip and use that or in the case of my gemini i have a switch hard wired in!

[Brent84]

Looking at the connector the closest things to brown is either brown with yellow or brown with white tracer any ideas ??

[festy]

Pin 'B' on the diagnostic port.
My LD wiring diagram shows it as a brown wire on A9, and my N13 harness has a brown wire there too.
Just check what colour wire in in A9.

[Brent84]

I don't suppose I cold get a copy of the Astra wiring diagram of you ?

I'm about to post some pics of the connector .

[festy]

Is this any help?

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