OEM 2004 Toyota MR2 Spyder Throttle Body

2004 Toyota MR2 Spyder Parts Questions & Experts Answers

• Q: How to Service and Repair the Throttle Body on 2004 Toyota MR2 Spyder?

  A: The service and repair of the Throttle Body (SMT) begins with draining engine coolant then removing the suspension upper brace and disconnecting the VSV for the EVAP hose and finally removing the VSV for the EVAP together with the air cleaner hose. Service of the Throttle Body (SMT) requires disconnecting the accelerator cable along with the removal of the throttle body through disconnecting the throttle position sensor connector, throttle control motor connector, PCV hose, and the two water bypass hoses, followed by removing the two bolts and throttle body bracket and then removing the two bolts, two nuts, throttle body and two gaskets from the intake manifold. The installation begins by placing two new gaskets onto the intake manifold followed by connecting the accelerator position sensor connector and securing the throttle body with two bolts and two nuts which require torquing to 30 N.m (305 kgf.cm, 22 ft.lbf) and then proceeding to fasten the throttle body bracket with two bolts torqued to 49 N.m (500 kgf.cm, 36 ft.lbf). First connect both water bypass hoses and the PCV hose alongside the throttle control motor connector and throttle position sensor connector before you reconnect the accelerator cable followed by installing VSV for the EVAP with its air cleaner hose and VSV for the EVAP hose then reinstall the suspension upper brace followed by engine coolant filling in the radiator. A test of the throttle control motor requires measurement of resistance between terminal 1 (M+) and 2 (M-) at 20 degrees Celsius (68 degrees Fahrenheit) to verify it falls within 0.3 - 100 Ohms while measuring clutch resistance between 3 (CL-) and 4 (CL+) to confirm it lies between 4.2 - 5.2 Ohms at 20 degrees Celsius (68 degrees Fahrenheit); replace the throttle body assembly if the measured values are outside these specifications. A faulty ignition or fuel controls may be indicated when testing the throttle position sensor resistance at 20 degrees Celsius (68 degrees Fahrenheit). The sensor replacement is necessary if resistance falls outside its range of 1.2 - 3.2 kOhms. Examine the accelerator position sensor to check its resistance compliance with the specified range. To replace the throttle position sensor first remove its two set screws and the sensor then install a new unit while setting the throttle angle to about 4% by connecting the throttle position sensor connector and using a hand-held tester or OBD II scan tool to verify the standard value of 15.2 plus or minus 0.8 % where you will tighten the screws to 2.0 N.m (20 kgf.cm, 18 in.lbf) and recheck the percentage. Execute the adjustment process again if required. Before finishing the procedure, paint the set screws while turning off the ignition switch and removing the throttle position sensor connector with its test equipment. Replace the accelerator position sensor by removing its four bolts and sensor then install the new sensor using 5.4 N.m (55 kgf.cm, 48 in.lbf) torque value and verify that the ACCEL POS #1 (VPA) voltage meets the range of 0.3 - 0.9 V. Complete the operation check of the system after installing the throttle body.