2.Misadjusted or bent throttle linkage.You don't know what was done before you got to it. (will not cause timing freeze to fail), Gunk under the throttle valve, in, under and around the butterfly plate to bore. Attach the positive (red) wire of the voltmeter to the safety pin and turn on the ignition switch without cranking the engine. In side the TB , Throttle body is a Throttle Valve, TV. If not unplug it and check it with the TB closed. connected, ground the diagnostic (ALDL) terminal (same as you would do to flash 1: The end to end ohms on your POT must be steady at all times. Reviewed in the United States on July 29, 2021. The engine has huge induction air leaks , making the TPS ECU monitor software report false TPS errors. Unscrew the TBI's bolt with the wrench and pull the TBI from the car. But does in LIMPHOME. If the meter does not read 5 volts, the TPS is bad. Hold the TPS in place and tighten the retaining screw with the Phillips-head screwdriver. (ECU sees, idle switch closed and RPM is a 4000 RPM, and low plenum vacuum..oops.?). Throttle Position Sensor Diagnostic Manual $2.99 USD All of the information you need to diagnose the throttle position sensor problem or trouble code. The reading should be the same as the previous reading. Never hot wire the main relay or fuel pump relay or blow the ECU driver transistors to H3LL. prevent the throttle blade from closing too far and getting wedged/stuck in the You may cause the throttle to stick open. TEST 3: Making Sure The TPS Is Getting Ground. on the throttle blade or throttle body bore, The throttle stop screw CALIBRATION GAUGES : 10 years of methods and values. If you do, the next step will address in the error message. If you get a Check Engine light error indicating that a TPS failure, it is most likely caused by not having the TPS driver nut in the correct position. Keep in mind a failing TPS may send voltages to the ECU that the ECU likes and believes and Unflood mode gets activated. . Test 2: Pin D, the ground pin test, it must read 0 volts , zero volts 0 to 0.5v. and Fast idle commands(ECU) will never happen. It must not over or under travel. Works well. 1) All pins on allMPI TPS look like this and rules and wire colors ! If not, allhell breaks loosewith the driver (Max Surge) This is why we use the all 3 feeler gauges for calibration. The Below internals of my TPS, are cracked, car will never idle. Start the engine to test the TBI. What you do is: (3 ways to joy? (DP = dashpot on rear of 8v TB), The TPS was calibrated, but not tested with all 3 feeler gages, 91+. end test 4: Predicates: (it will fail ! Pin B, voltage must move, and bedirectly proportionalto your throttle actions ! The Feeler gauge Matrix Table 1: (created from all origional FSM manuals (factory service manuals) Suzuk and GM.) Locate the throttle position sensor on the throttle body, and unplug the attached electrical connectors from it. So there are 2 tests and only 1 calibration. ON THIS at all ! if it reads 4k is must, be so, at all times (that is how yours is and works) STOICH: (means perfect fueling) that happens in Closed Loop mode of the ECU. The TPS angles are not calibrated. ThrottleAngle: (the Suzuki TP pin) We do the 4 TPS tests below first, before Calibrationsteps hereto be sure its even working at all. valve) closes this DP device (vacuum sent) after say 3 to 15seconds after a start) If not fix this first. Turn the engine on and let it warm up for about five minutes. Remove the AWS hose from the inlet pipe to access the TPS sensor on the firewall. There's nothing to adjust. Eg. The dash pot device on the TBI 8v must be. This may be .045-.065 volts. To be quite honest, you dont really see many IAC valves fail. or even jam the throttle). TB. (use the 8v rules for these test above) If you also look carefully the TV throttle stop screw isblocked from anyone touching it !!! Failure of Idle switch: NOTE 1Exceptions: G16a TBI EFI 1989/90 ONLY using these special steps only. Unflood mode forever. (no more Code 44s now !) You must leave the connector connected,andus a back probe technique, to read the voltages. (even and old analog needle meter works perfectly) When you first open WinALDL, this screen will appear. Check throttle position sensor input voltage. (if it wont calibrate the TPS is bad or mounted wrong or theTVis not closed 100% or someone bent the TV shaft or the TPS is not indexed to the body right.). November 11, 2019 by Jason. If it stays closed too long, the ECU will fight you, as you tip in the throttle , one of the most odd sensations in car, you will ever experience, here) (IAC counts = 0), thus closing off the idle air passage. ), Using Walmart leather sewing needles work great. the observed IAC position counts come to rest within the spec range I Any ohm meter works, here, even the $10 Walmart meter, works very well. (Walmart) Thank you from italy. You've adjusted the Throttle Plates using the idle stop. If you're unsure how to . (7/16 inches). spec is. During this time, the IAC valve is typically extended out all the way Never touch this screw below, the feeler is the Calibration tool . on the left. as a secondary function to adjust the minimum air setting. Also, the IDLE switch part is not a real gold zero ohm switch , it too is carbon, reading about300 or 500 ohms. Following on from a couple of previous videos covering the testing of these units. Adjust rear TBI throttle stop screw to approx 6" of H2O on manometer. And very accurate, even i dont know english very well. (<<
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