Can throttle position sensor affect transmission shifting?
The Throttle Position sensor measures the throttle position, which is controlled by the gas pedal. It is used to determine engine load and if it fails it can cause automatic transmission shifting problems.
Can you drive without TPS?
The TPS or Throttle Postition Sensor tells the ECU how far the throttle is open, thus how much fuel is demanded. You will still be able to drive without a TPS, though not very well. The ECU will see a lean condition from the o2 once to open the throttle and it will atempt to richen it up.
What determines the timing of the shifts in an automatic transmission?
An automatic transmission uses sensors to determine when it should shift gears, and changes them using internal oil pressure.
What kind of transmission does a MR2 Spyder have?
Toyota chose to install a unique transmission option in some 2001-05 MR2 Spyders. The SMT transmission is an automatically shifted manual transmission with a single clutch. It offered near-automatic convenience and clutchless operation for those not comfortable with a conventional manual transmission.
How is a TP sensor used in an automatic transmission?
The PCM and the TCM share the output. This sensor’s signal, along with the vehicle speed sensor, is used by the TCM to provide optimal shift timing. Most TP sensors have extra pins for extra internal functionality. For this discussion, we look at three terminals and the sensor’s connection to the automatic transmission.
What is the downshift system on a Toyota MR2 Spyder?
Both controls initiate a sequence in which the throttle is closed, the clutch is disengaged, and the shift mechanism is activated. On downshifts—as in Ferrari’s $155,000 360 Modena F1—the system provides a blip of power to match engine and transmission speeds for seamless events.
What’s the 0 to 60 mph time on a Toyota MR2?
Although this isn’t a problem during normal or even sporty driving, the shifts seem agonizingly slow at the drag strip. Any one of our test drivers could stab the pedals and snap the lever through the gate in half the time. So the 0-to-60-mph time — at 8.2 seconds — is 1.4 seconds slower than the last MR2 we tested.