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Honda Jazz Forums => Honda Jazz Mk1 2002-2008 => Topic started by: tagger on November 28, 2022, 09:32:20 PM

Title: Ckp relearn
Post by: tagger on November 28, 2022, 09:32:20 PM
Hi
Got a jazz 2003 that needs a ckp relearn.
I have  think diag bluetooth UK unit  that doesn't  support this.
Anybody know of an inexpensive scan tool that will do this.

Cheers ian
Title: Re: Ckp relearn
Post by: UKjim on November 30, 2022, 04:28:03 PM
Hi
Got a jazz 2003 that needs a ckp relearn.
I have  think diag bluetooth UK unit  that doesn't  support this.
Anybody know of an inexpensive scan tool that will do this.

Cheers ian
Excuse my ignorance but what's a CKP?


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Title: Re: Ckp relearn
Post by: Lord Voltermore on November 30, 2022, 05:27:50 PM
Not sure what the initials stand for  but its basically a sensor that detects the exact position of the crankshaft (engine) rotation so the spark plugs are fired at exactly the right moment.  Similar in effect to the old fashioned  timing lights used to check ignition timing  using a strobe light except it sends a signal to the ECU  which can constantly alter timing to maintain maximum efficiency  in all circumstances.     OP needs a reader that can communicate with the ecu and reset the calibration.   Sorry I dont know of any.

In the good old days  (1920's )  the driver could manually alter the ignition advance and retard  using a lever on the steering wheel ,often while driving, until  you could feel the engine was running better. You made regular alterations as the ideal setting varied with circumstances. They often had a second  lever operating as a hand throttle  - cruise control!       Then ,until 1980's  timing was altered automatically  using spinning bobs in the  distributor  - a bit like those spinning regulators on steam engines.   The results were a bit of a compromise.      Now technology has finally caught up with the 1920's.   ;D .
Title: Re: Ckp relearn
Post by: Jocko on November 30, 2022, 06:42:56 PM
CKP just refers to CranK Position. Don't ask!