Cant get auto transmission in 89 GQ auto to go into diagnostic mode.

[ckh]

[QUOTE=taslucas;330866]How is it not in diagnosis mode?
What do you think diagnostic mode is?

Diagnostic mode is when it doest the 10 flashes.... pre the transmission center doing the torque converter I could do that test, now its doesnt even try. I know what your saying that it may be as the continuious light could be the error code its self, but I'm concerned about the buzzing sound I heard from the transmission yesterday.....

[ckh]

Flat road, just crusing along, but it ony does it between 85-95 if I sit on 100 doesnt do it...

[taslucas]

My diagnosis test did the same as yours, one continuous light. One of the things it said in my book for that was a faulty TPS, turns out I didn't even have a TPS (someone had fitted a carby from a manual, which doesn't have a TPS) so it looks like the diagnosis was correct.

Other things that can cause the TC to lock/unlock are;
Losing oil pressure(like past the "o" ring as happened to you).

Faulty TPS.(try adjusting it slightly left or right)

Lockout solenoid faulty (maybe that is the buzzing sound. But it shouldn't be a rapid lock/unlock, more likely to just stay off or on).

Faulty temp switch (there are two bolted to the valvebody, one sends a signal to the tcu the other is solely for the temp warning light on the dash).

Dodgy wiring(but again, it would more likely stay on or off)

Faulty road speed sensor (fairly rare. Does the Speedo flicker at all)


FanTapstic!

[Alitis007]

1. Is the speedo accurate? Because on my car 85 - 95 on the cluster is only 78 - 85 ground speed.
2.On flat ground it should lock up at 60km/h when the fluid is over 60 degrees and once you depress the accelerator it unlocks.
3.@ 80km/h ground speed the autos do the same but more noticeably/harshly thats why people independently wire the solenoid to keep it locked up via a switch.

[ckh]

correction going for a long drive yesterday it was doing it at 100+ as well...

[Alitis007]

correction going for a long drive yesterday it was doing it at 100+ as well...

Sry mate but can you clarify that the actual motor races/flairs or just the tacho ???

[ckh]

Sry mate but can you clarify that the actual motor races/flairs or just the tacho ???

saw tacho jump and could feel a fare from the engine...

[NissanGQ4.2]

So when the Tranny was out was the O-ring the only thing replaced???? I assunme this was a n O-ring in the valve body and not the TC itself? Did he check the clutch packs, test the solenoids, Test the TC itself.....etc?????

[NissanGQ4.2]

Some light reading for you Marc

http://forums.nicoclub.com/g50-trans...r-t550778.html

[ckh]

So when the Tranny was out was the O-ring the only thing replaced???? I assunme this was a n O-ring in the valve body and not the TC itself? Did he check the clutch packs, test the solenoids, Test the TC itself.....etc?????

the o ring was on the input shaft which is the inside the torque coverter when its on, he said he put a reconned converter on he didnt mention anything about clutch packs, but he said he replaced the pads in the handbrake drum. when I went back next morning, he pretty much said to live with it