Think about it, there are also solenoids in there too. The throttle position sensor and vehicle speed sensor will let the transmission know what point it should shift at. The 1-2 solenoid involves shifting from first to second... the 2-3 solenoid... etc. The lockup solenoid makes the torque converter lock up. Shift signal... well... dunno what the pulse generator does...

OBD II has to do with emissions

 

well thats not true about oBDII its not only used for `emissions it was was made for the tecs to make it easy on them for checkinking the ecu ..... u know what lets drop it lets get back to the forum

 

I think it might have soemthing to do with the speed sensor! CHeck it, My car recently started doing the exact same thing...... I have not taken it in yet, hopefully will get there today!
Becca

 

transmition fluid and solinoids are the two things that will make the hold light flash. Neowave is right about the obd II

 

HI The hold light has not acted up for weeks. yestrday i was heading out of town and as soon as I get in the car, it hapens again. So I did note that when I turn the car off. it stops until I get travelling down a hill. THEN its starts blinking again.
Weird I know. I stopped the car about 10 times yesterday and each time the HOLD light went off, and thencame back on, when I start travelling downhill.

 

sounds like tranny fluid is low. just low enough that it's fine when level but the sensor in the back is exposed when going down hill. I'd say check your fluid level.

 

I checked the tranny fluid yesterday and it looks fine to me. How much fluid is supposed to be on the stick>? The car was running when i checked it. and the fluid was all over the lower portion of the stick.

Perhpas I'll take her in and get them to ceck it at the SStation.

Becca

 

Did you post here? http://www.mazda323performance.com/f...pic.php?t=6414

if that's you did you check any of the stuff I mention there?