I started a new thread on this subject to allow others to contribute to this list. I cannot verify all the different "Year, Model, Engine" combinations by myself. So, I will show you how to find it for yourself. If you find your cars information please post it here.
This information is provided free for use AT YOUR OWN RISK and is without guaranty or warranty or of any kind. Not every situation will conform to the given example. Your use of this information signifies that you assume all responsibility for any damage or loss.
It seems that the USA/Canada made Suzukis and Chevy/Geo Trackers are the ones not equipped with the Diagnosis Connector (or Monitor Coupler). It is important to know that the pinouts of the cars computers (ECMs) are not all alike. Find the correct manual for your car and locate the page that looks like the example schematic pictured below.
Here is a post for Suzuki Service Manuals:
From what I found (so far) about these vehicles with no Diagnosis Connector, is that the supporting electronics are still there and the connector was simply NOT
installed in the wire harness.
The schematic below is an example from the service manual that helped me find my pin location on the ECM to set Fixed Timing.
The example shows where the Monitor Coupler (Diagnosis Connector) would have been wired into the ECM. In this case pin TS (Timing Set) is wired to ECM connector E61 pin 16 or [E61-16]. Note the connector and pin location on the ECM circled in red at the bottom left.
Here is another example from the Wiring Diagram manual.
This example shows the same thing. Diagnosis Connector (Monitor Coupler) E152 pin 5 is wired to the ECM at E61 pin 16.
To set "Fixed Timing" jumper pins 4 and 5 on the Diagnosis Connector E152.
In this case of the 2000 Grand Vitara that does not have a Diagnosis Connector,
Jumper ECM E61-16 to Chassis Ground (Negative Battery Terminal).