Hi all,

iv'e got an auto tt and the gearbox is slow on the upchange and sometimes wont change up at all.Its definately a sensor or a/t ecu problem.

I replaced the TPS and set it up correctly and made sure i was getting 0.45v closed throttle and 4.0v wide open throttle which it was at the plug harness where the TPS plugs in.However when i test the voltage accross terminals 34 and ground on the a/t ecu i only get 0.35v closed throttle and 2.9v wide open throttle.Now if i cut the wire that goes to terminal 34 just before the ecu connector and test the voltage it is correct,as soon as i re-connect the wire i lose some of the voltage.I thoroughly checked the pins on the connector and there is good continuity,and all the wiring from ecu to TPS is fine.So i suspect the ecu may be at fault?..Does anybody know for sure that the voltage at terminal 34 is the same as at the TPS plug 0.45v - 4.0v or is it supposed to lose some voltage through the ecu as mine does.

Cheers guys hope i'm not getting to technical and boring you all

Steve.....

it should be the similar to the voltage at the main ECCS ECU and ranging from 0.4 to 4.0 V

 

http://300zx-twinturbo.com/cgi-bin/manual.cgi?list=at&dir=&config=&refresh=&direction=forward&scale=0&cycle=off&slide=84&design=default&total=194

 

it could be an electronic problem with the AT-ecu.