Question about 1995 Toyota Corolla
Posted by Anonymous on
Hi, the pump power is on the blue wire. If that wire is hot and you have ground in the black wire, the pump should be on. If not, replace pump. Please let me know if you have more questions, and thanks for using FixYa.
Posted on Jan 03, 2011
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Posted on Jan 02, 2017
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The electrical connector to the IACV
can have 2 or 4 pins:-
pins: resistance between pins should about 10 OHMS +/- 3 OHMS. Resistance between either of the pins and the
valve body is greater than 10,000 OHMS
pins: resistance between diagonally positioned pins should be about 20 OHMS
2) Throttle position sensor - Sometimes with ignition off it is possible to reset the TPS by depressing the accelerator fully and releasing quickly. Ignition might be enhanced by depressing the the throttle slowly. If the car cuts out if the accelerator is depressed quickly this is another indicator of a bad TPS. How to check? The socket for electrical connection with the TPS has 3 pins, one for 'ground', one for 5 volts 'reference' and a third (generally the middle one) for 'signal' output. Back probe the signal pin in the connector to the TPS. Attach the positive lead of a voltmeter to the probe and measure the voltage output as the throttle plate is rotated. If working correctly the meter should show a voltage consistent with the throttle position from approximately 1 volt when closed and 5 volts when fully open. What is looked for is smooth voltage increase with throttle change. If there are drop outs in the transition or that there is no transition seen the TPS is faulty.
3) cam or crank sensor faults - 2 pin socket (magnetic - sine wave output). One pin is 'ground' the other is 'signal'. A voltmeter set to 2 volts AC should measure a signal in the 0.2 to 2 volts range on the 'signal' pin.
pin socket (Hall effect, magneto - square wave form output). One pin is 'reference' (5volts), one pin is
'ground' and the third pin is 'signal'.
A DC voltage should be detectable in the 0.5 to 1.5 volt range from the
It is important that the voltage measurement take place at start up when the engine is cold and again, 20 minutes later, when the engine has fully warmed up to operating temperature. Often the voltage output from faulty sensors declines with temperature rise. I appreciate here that due to a lack of starting in your case it just might be impossible to check the 'warmed up' situation. I hope this helps.
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