How do i adjust throttle sensor on 92 estima 2.2td auto
you need to find out what the output of the tps should be at normal operating temperature (tps = Throttle position sensor). Most are three wire sensors, one wire is a supply rail usually 12volts or 5volts, the next wire is the output of the sensor back to the vehicle's control unit and the third wire is the reference earth which should always read as zero volts or just above zero ( like 0.2 volt) you need to locate the output wire, the voltage on this wire will change with throttle position so when the throttle is closed ( at idle) this wire will give you a voltage. You loosen the fixing bolts on the sensor and move it very slightly to change this reading to whatever the correct reading should be. On most vehicles here in australia, the tps is set to .9 volts but you need the correct voltage for your vehicle. If you find that the sensor has insufficient adjustment to give the correct reading, replace the sensor. If you find that the supply voltage is incorrect, refer to a wiring diagram to confirm where this wire receives its power from. Trace the wire and check the voltage until you locate the issue. If this wire is fed 5 volts from the vehicle computer, check the voltage AT THE COMPUTER and if it is still low, high or missing, replace the computer. If the voltage is correct at the computer, trace back to the sensor checking the voltage until you locate the issue and repair it. If the vehicle has a Delco Remy computer, have it tested and repaired by a qualified technician ( some delco remy computers had an issue with cheap Japanese electrolytic capacitors) DON'T ATTEMPT this yourself, these computers use multi layer boards and MUST be repaired using special equipment or you will cause catastrophic damage.
Contact your local dealership or garage for the correct sensor voltage when the sensor is in the idle position or purchase the manual for the vehicle which should contain these and other voltages along with workshop procedures for locating issues within the engine management. Having a manual is always a good investment and you can sell the manual if you ever sell the vehicle..
Dec 15, 2009 |
1994 Toyota Previa