Question about 1995 Honda Civic

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On a 1995 Civic, cannot time. Trouble code "CYP sensor."

I replaced the distributor under warranty, and cannot adjust the ignition timing. It is not close, and there is a lot of pinging when accelerating. Also, the check engine code reads "check CYP." The CYP ohms at about 450 ohms.
Following to the Haynes manual, I jumped the diagnostic connector prior to running the engine to check the timing with a timing light. I later noticed that the Haynes book is the only place that calls for shorting the pins. Did I foul up the ECU by following those directions?

Dan Worried..(my friend's car, just trying to be nice!)

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  • dmohr Jan 26, 2009

    Perfect answer. Timing belt was recently replaced, they did not install it correctly. I corrected mechanical timing, and ignition timing then worked.

    ERROR CODE CYP was due to a defective sensor in a brand new distributor. I need to find a reliable supplier for Honda distributors.

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Pull the cap of the distributor,Rotate the engine to top dead center and see if the rotor is lined up with the # 1 plug wire.(if it's 180 degrees off the rotor button will be pointing directly opposite of the # plug wire location and will require pulling the distributor back out and turning the rotor button to line up with # 1 mark and manually turning the motor one full turn,and then reinstalling the distributor)If it is only slightly off you will need to pull the distributor and turn rotor counter clockwise just a little bit and reinstalling making sure the rotor is lined up with the # 1 wire.

Posted on Jan 25, 2009

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Welcome to Fixya! You should not have messed anything up as long as you followed the Instructions. It sounds like you may have a Bad Timing belt if you cannot get Close after all that work. I would replace the Timing Belt and you should be able to reset the Timing Pretty easy after that. Let me Know!

Posted on Jan 25, 2009

  • Travis Humphries
    Travis Humphries Jan 26, 2009

    No Problem! Happy To Help!!!!

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Hi, since you've replaced everything else, about the only thing left is the crankshaft position sensor. This is the sensor the computer uses to time the spark signals. Because this sensor is expensive, I recommend you test it first to verify it's bad before replacing. I have pasted test procedures below as well as replacement procedure in case it fails the tests. You will need an ohmmeter for the test. If you don't have an ohmmeter, you can buy one for as little as $10, or maybe you can borrow one. You will also need a timing light if you replace the sensor. Please let me know if you have questions, and thanks for using FixYa.


TESTING CRV and 1995 Odyssey Models

  1. With the ignition switch OFF , detach the electrical connector on the side of the distributor housing.
  2. Measure the resistance between the following two CKP wires:

    CRV models: The blue and white wires. The resistance should be 300-700 ohms. 1995 Odyssey models: The blue/green and blue/yellow wires. The resistance should be 700-1,300 ohms.
  3. If the resistance is not in the specified range, replace the distributor ignition housing.


REMOVAL & INSTALLATION CRV and 1995 Odyssey Models

  1. Remove the negative battery cable.
  2. Remove the distributor cap leaving the wires attached and place aside.
  3. Disconnect the electrical connectors at the side of the distributor housing.
  4. Make a matchmark reference mark between the distributor housing and the cylinder head and remove the distributor housing assembly.

To install:
  1. Transfer the components not supplied with the replacement distributor housing assembly.
  2. Install the distributor housing assembly in the reverse order of removal.

jturcotte_1430.gif

Fig. Fig. 2: The Crankshaft Position (CKP) Sensor rotor looks like a small gear in the lower distributor housing- CRV and 1995 Odyssey models



7. Check and reset the ignition timing as outlined below.

ADJUSTMENT CRV and 4-Cylinder Odyssey Models



If equipped with an automatic transaxle, place the shifter in Park or Neutral. If equipped with a manual transaxle place the shifter in Neutral. Make sure to apply the parking brake and block the drive wheels.


  1. With the heater off and in the full cold position, start the engine and hold the engine speed at 3000 rpm, until the radiator fan comes on at least one time. To check the ignition timing, the engine must be at idle speed and at normal operating temperature. Make sure all electrical consumers (defroster, radio, air conditioning, lights, etc.,) are turned OFF.
  2. Locate the blue plastic Service Check (SCS) Connector, as follows:

    Odyssey models with 4-cylinder engines: centrally located on the passenger side, under the dash. The connector has two wires; one is brown with a black tracer, and the other wire is red.

See Figures 1 and 2

jturcotte_393.jpg

Fig. Fig. 1: The inductive lead of the timing light is placed around the No. 1 spark plug wire; and the light is aimed toward the marks on the crankshaft pulley.


jturcotte_1431.gif

Fig. Fig. 2: The red ignition timing mark on the crankshaft pulley is lined up with the pointer. The two small notches on either side of the red colored notch represent the plus (+) or minus (-) 2° increments. The white notch to the far right is Top Dead Center (TDC)

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  2. Connect a timing light to No. 1 ignition wire and point the light toward the pointer on the timing belt cover.
  3. Check the idle speed and adjust if necessary.
  4. The red mark on the crankshaft pulley should be aligned with the pointer on the timing belt cover.
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