Ls1 obdii

[Doubledip]

Originally Posted by Modena

the only catch is (from memory) that reading/writing through the plug is many, many times slower than connecting direct to the PCM

HUH??? dont think so....

12V Battery power --> ODB2 Pin 16
Earth --> ODB2 Pin 4
Earth --> ODB2 Pin 5
Pin 58 Blue Plug LS1 --> ODB2 Pin 2


who wired you harness with out a ODB2 plug? only half a job ....

[Modena]

Originally Posted by Doubledip

HUH??? dont think so....

I may very well be wrong, but in the early days of LS1 Edit I'm sure I remember this being the case? The tuners even went to the trouble of connecting to the PCM under the bonnet in that tight hot space because of this......no?

[Doubledip]

I would think that was more the problem with the software than the car....

Do think that a car manufacturer would put a plug in the car to program with but know they have to remove the pcm

The 10 years I worked at Holden and still 10 years later they still don't have any form of on bench off car programming

[Aussie Mike]

Plugging into the OBD2 port or direct to the ECU is the same. They both use the same serial data pin.

Serial data (pin 58) is a yellow wire from memory.

Cheers