Out of Ideas (auto trans problem)
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Hey guys. A buddy of mine recently got his SC300 which came with an auto trans that had a shifting problem, The final gear doesn't engage(this is with Overdrive on). At first we thought it was the ecu so we switched it out with a known working one. Same thing happened. He got fed up just got a different working auto trans(torque converter included). Same thing happened. so now we are stumped. Are there any other sensors the control the shifting points of the auto transmission?
EDIT:
Assuming that since the engine temp gauge works, the engine temp sensor should be working.
Any suggestions?
EDIT:
Assuming that since the engine temp gauge works, the engine temp sensor should be working.
Any suggestions?
Last edited by BrownGuy; 03-28-10 at 06:50 PM.
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Thanks! We have checked ecu, temp sensor and the solenoid in the new transmission seemed fine. So we will check the speed sensor. If the speedometer works, can we assume the speed sensor works tho?
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Im having the same problem there are 2 vehicle speed sensors on the tail of the trans, one for cluster one input to trans, i changed both which did not fix my problem, changed fluid with filter, adjusted kick down cable and tps nothing scaned car fault says it could be tcc, vss or ecu two more to go if anyone has same issue and can help please starting to get desperate and running out of money. thanx
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Ok, since classes are over for now we were back at it. We checked all suggested:
Speed sensor-ok
O/D switch-ok (checked with volt meter in every gear)
temp sensor-ok
auto trans solenoid-ok
and finally ecu-ok (no check engine light)
and still nothing.... frustration is starting to set in...
Speed sensor-ok
O/D switch-ok (checked with volt meter in every gear)
temp sensor-ok
auto trans solenoid-ok
and finally ecu-ok (no check engine light)
and still nothing.... frustration is starting to set in...
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you got 2 speed sensors, and no, the speedometer working is not an indication that your speed sensors are both operating properly... it just means that one of them is, the less important one. so go check your other sensor according to the manual. its one of the main sensors a transmission uses for up shifting. the 2-wire speed sensor.
https://www.clublexus.com/forums/lex...1-install.html
https://www.clublexus.com/forums/sc-...sors-help.html
https://www.clublexus.com/forums/lex...1-install.html
https://www.clublexus.com/forums/sc-...sors-help.html
Last edited by Ali SC3; 05-12-10 at 11:33 AM.
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my 93 sc400 will not auto shift down to low,but i can put into low take off shift to 2nd and drive and it drives fine till i stop and go again. any ideas thanks?