Question about 1990 Honda Civic

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How do u check speed sensor - 1990 Honda Civic

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  • Desmond Rogers
    Desmond Rogers Nov 19, 2009

    how do u get speed sensor out of tranny

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With a voltage meter. Hook up to signal side and spin tire. If the vehicle is new enough data may be availiable thru a scanner so you can check it easier. Your looking for any glitches as you speed up. Alot of times the signal will just drop out. By looking at a scanner you will see all tires at once and be able to tell what tire isnt the same. On a scanner your seeing miles per hour.

Posted on Nov 19, 2009

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Lorraine, speed sensors are not located on engines. there are transmission speed sensors and wheel speed sensors.
Check the attached links,instruction and guides, Good luck
"I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."
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P0501 code?


P0501 - Vehicle Speed Sensor (G22): Implausible Signal Possible Causes
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What are the probable causes of DTCs C0222, C0226, and C0237?


Brent, Check and clean connections(use electronic contact cleaner), make sure wires are not damaged. Check grounds from EBCM controller. Check links below and don't be afraid to google search for more info.
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- Right/ Left Front Speed Sensor harness is open or shorted
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Where is the speed sensor?


there several speed sensors 1 on every wheel for abs called wheel speed sensor and in transfer case 4wd or awd call output shaft speed sensor or vehicle speed sensor and input shaft speed sensor which can be a computer generated signal from crankshaft sensor and output shaft speed sensor this is to determine torque converter lock up.

May 16, 2014 | 2004 Jeep Grand Cherokee

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Trouble shoot


I believe that's a Speed Sensor issue.

Diag:
1. Ensure mainshaft and countershaft speed sensors are installed properly. Disconnect mainshaft speed sensor harness connector. Using a DVOM, measure resistance between sensor terminals.

2. If resistance is not 400-600 ohms, replace mainshaft speed sensor. If resistance is 400-600 ohms, disconnect 25-pin PCM harness connector "B". Check for continuity between ground and 25-pin PCM harness connector "B", terminals No. 15 (Red wire) and No. 14 (White wire).

3. If continuity is present, repair short to ground in Red or White wire between PCM and mainshaft speed sensor. If continuity is not present, reconnect mainshaft speed sensor harness connector. Measure resistance between 25-pin PCM harness connector "B", terminals No. 15 (Red wire) and No. 14 (White wire).

4. If resistance is not 400-600 ohms, go to next step. If resistance is 400-600 ohms, go to DTC
P0720 (FLASH CODE 9) . Check for loose PCM harness connectors. Replace PCM with a
known-good unit if necessary.

5. Disconnect mainshaft speed sensor harness connector. Check Red wire for continuity between 25-pin PCM harness connector "B", terminal No. 15 and mainshaft speed sensor harness connector. If continuity is present, go to next step. If continuity is not present, repair open in Red wire between 25-pin PCM harness connector and mainshaft speed sensor
harness connector.

6. Check White wire for continuity between 25-pin PCM harness connector "B", terminal No. 14 and mainshaft speed sensor harness connector. If continuity is present, check for loose PCM harness connectors. Replace PCM with a known-good unit if necessary. If continuity is not present, repair open in White wire between 25-pin PCM harness connector and mainshaft speed sensor harness connector.

Mar 21, 2014 | 1998 Acura Integra

1 Answer

Car


Speed Sensor probably. Try:
1. Ensure mainshaft and countershaft speed sensors are installed properly. Disconnect mainshaft speed sensor harness connector. Using a DVOM, measure resistance between sensor terminals.

2. If resistance is not 400-600 ohms, replace mainshaft speed sensor. If resistance is 400-600 ohms, disconnect 25-pin PCM harness connector "B". Check for continuity between ground and 25-pin PCM harness connector "B", terminals No. 15 (Red wire) and No. 14 (White wire).

3. If continuity is present, repair short to ground in Red or White wire between PCM and mainshaft speed sensor. If continuity is not present, reconnect mainshaft speed sensor harness connector. Measure resistance between 25-pin PCM harness connector "B", terminals No. 15 (Red wire) and No. 14 (White wire).

4. If resistance is not 400-600 ohms, go to next step. If resistance is 400-600 ohms, go to DTC
P0720 (FLASH CODE 9) . Check for loose PCM harness connectors. Replace PCM with a
known-good unit if necessary.

5. Disconnect mainshaft speed sensor harness connector. Check Red wire for continuity between 25-pin PCM harness connector "B", terminal No. 15 and mainshaft speed sensor harness connector. If continuity is present, go to next step. If continuity is not present, repair open in Red wire between 25-pin PCM harness connector and mainshaft speed sensor
harness connector.

6. Check White wire for continuity between 25-pin PCM harness connector "B", terminal No. 14 and mainshaft speed sensor harness connector. If continuity is present, check for loose PCM harness connectors. Replace PCM with a known-good unit if necessary. If continuity is not present, repair open in White wire between 25-pin PCM harness connector and mainshaft speed sensor harness connector.

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Cannot find tranny oil fill plug for 1995 ford Escort


LEVEL CHECK -manual transmission The vehicle speed sensor (speedometer gear), which is located on the transaxle, serves as the manual transaxle's dipstick.
  1. Park the car on a level surface, turn the engine OFF and apply the parking brake.
  2. Locate the speedometer cable assembly where it enters the transaxle.
  3. Unplug the electrical connection from the vehicle speed sensor (speedometer gear).
  4. Disconnect the speedometer cable from the speed sensor.
  5. Wipe the area around the speed sensor with a clean rag, then loosen the speed sensor retaining bolt.
  6. Gently pry the speed sensor from the transaxle. Fig. 1: Location of the manual transaxle's fluid level marks — 1.8L engine 90981g14.gif
    Fig. 2: Location of the manual transaxle's fluid level marks — 1.9L and 2.0L engines 90981g15.gif

  7. Check the condition of the speed sensor O-ring and replace it if it is damaged.
  8. Check the fluid level on the speed sensor as illustrated.
  9. If the level is low, place a funnel in the speed sensor hole.
  10. Add the specified fluid to the transaxle until the FULL level is reached. Do not overfill the transaxle.
  11. Install the speed sensor and tighten the retaining bolt to 69–104 inch lbs. (8–12 Nm).
  12. Connect the speedometer cable.
  13. Engage the speed sensor electrical connection. Fig. 3: If necessary, add transmission fluid through a funnel into the speed sensor opening 90981g16.gif

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OVERDRIVE ENGAGEMENT IS TIED TO THE SPEED SENSOR SIGNAL, THE SYSTEM WILL NOT GO INTO OD UNTIL THE CAR REACHES A CERTAIN SPEED, IN MOST CASES AROUND 35-40 MPH, THE SPEED SENSOR SIGNAL TELLS THE ECU WHEN THE CORRECT SPEED HAS BEEN REACHED.

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