Cannot clear SIR lights (seat belt and INFL REST)

[HAWAIIZR-1]

Hey folks,

I posted this message in the ListServer, but we have some smart folks here too so I'll figured I better post here too. I did my final preps to ship the vehicle to Japan tomorrow morning, but have not been able to resolve this issue as of yet.

Thanks,

Craig


I have a 90 MY with the famous seat belt and INFL REST lights on. Assuming it was grounding issues for sensors when I pulled the motor last year for rebuild and cleaned up the frame, that was double checked and cleaned up and I think it was addressed.

So in attempts to clear the code and lights with the information found in FSM and different forums, I tried to ground the Cavity K or ALDL with ground and A cavity, but neither did anything to diagnose or allow clearing the codes.

The only thing that happens is once the ignition is turned on the INFL REST light comes on, then will flash one time a few seconds later and that is it.
Doing all the 3 second intervals of off and on, etc. does nothing since it does not even seems to go into diagnostic mode.

I also have the ALDL Diagnostic Ground Tool for 1981-1993 that was developed by Gordon Killebrew and sold by Performance Choice (I believe MIDAMERICA) and following the user's manual brings the same results to diagnose or clear. Reading somewhere else on a forum it indicates the DERM (Diagnostic Energy Reserve Module) could be bad if I can't get any kind of results from grounding.

Any input and help related to this issue will be greatly appreciated. Thank you in advance.

Aloha,

Craig Toyooka
1990 #1727