Diagnostic sockets/ECU - little/no response (1995 850 GLT)

psmoss · Post by **psmoss** » 08 Sep 2007, 13:29

1995 Volvo 850 GLT, ~175k miles

Hi all,

Trying to fix a busted odo gear, but need to get the actual mileage off the ECU first.

I d/led the service manual and was going to pull all the diagnostic codes. However, although the LED lights up when I press the button (key in position II), I got no response afterwards with the jumper cable in any of the sockets.

I followed the instructions in the service manual and got right at 10V from sockets 2 and 6.

The next step involves something with a measuring unit (???). What is this?

I tried to clean up the connections to the LED and jumper wire and re-attached everything; went back to the car and was able to get some flashing lights at the A connector, but *very* intermittently. Sometimes I can hear a clicking sound after depressing the button once, but the LED doesn't flash with the clicks.

I checked all the fuses and they're all intact.

Now what?

Any help appreciated,
Patrick

Ubergeek · Post by **Ubergeek** » 09 Sep 2007, 08:38

to get the actual mileage you must have the gauge cluster plugged in.

psmoss · Post by **psmoss** » 09 Sep 2007, 09:31

Ubergeek wrote:to get the actual mileage you must have the gauge cluster plugged in.

The gauge cluster is plugged in.