overdrive prob

[anuar_fadzli]

is it anyone face this prob, my od signal sometimes will blink at my meter panel even when im in normal mode. i mean no t push the od button. when its appear my gear box also not function also like its cannot change to low gear by itself. is this ecu problem or gearbox problem. :hmmmm:

 

[nappx]

time to change to manual...ha ha ha

 

[anuar_fadzli]

later on will consider. now financial not enough.

 

[wfhan]

i quote this from some other web.

"[FONT=arial, Arial, Helvetica]Strictly speaking, the Overdrive switch does not control an overdrive at all. It is simply an electrical switch that forces the PCM to shift from 4th gear to 3rd, to provide more engine torque for overtaking. [/FONT][FONT=arial, Arial, Helvetica]The OD light is controlled by the PCM, not the OD switch on the gearchange lever, and it is the PCM which turns on the light. It follows that, if the PCM detects a problem with the gearbox, which is fully electronic, then it can blink the OD light.[/FONT][FONT=arial, Arial, Helvetica]"

[/FONT]there are many causes that will trigger O/D light blinks.
to name a few: ATF level, ATF temperature, input/output shaft speed sensor, torque converter, shift solenoid,etc...

but 1st, check ATF level, maybe it's time to flush and replenish with new ATF. if problem still persist, then it might not be the GB itself, but might be due to the TCM (Transmission Control Module) or PCM (Powertrain Control Module) that controls all the input. this means maybe faulty control module.

the best way is to bring to workshop, check do the diagnostics on OBD-II to retreive the error code.

 

[levin818]

waa... wfhan, thats very informative.

If it is happening to 20V A/T...
- Check the sensor are all present and no loose connection.
- Check your ECU. You might need to borrow one from others for a test.

Gd luck buddy!

 

[wfhan]

haha.. juz share share info.
me drove MT for more than 10yrs, but i'm noob in AT (juz chg to AT last yr)..:(

 

[2 Old 2 Rusty]

the best way is to bring to workshop, check do the diagnostics on OBD-II to retreive the error code.

I've been seeing this OBD-1 & OBD-II thing on the diagnostics reader. Can you please tell me what that means, bro ? Appreciate it, thanks.

 

[chinozie]

hahaha...good2...all toyotarian getting more and more intelligent...all problem can be solved...eqeqeqeq

 

[Adeen]

nice info on overdrive prob...

 

[anuar_fadzli]

thanks guys for that very informative solution. anyway i'm have the same question with bro 2 old 2 rusty. can u explain more bro wfhan.

 

[anuar_fadzli]

prob solve. ecu prob change to new one and no more prob.