Author_ Katman |
Created_May 2006 | Last
Update_May 2006
SYNOPSIS
This article describes how to trick a U.S. OBD2a or OBD2b ecu into
thinking a CKF sensor is wired in when there actually is no CKF sensor
on the engine.
What is the CKF sensor?
The CKF is the Crank Fluctuation Sensor.
On all 96+ (OBD2) Honda/Acura vehicles, this sensor is integrated onto the oil
pump.
(CKF images soon)
This trick is mainly aimed to help hybriders
who are using a U.S. OBD2a/b ecu in their
vehicle, but their motors are lacking a CKF
sensor.
For example, running an JDM OBD2 engine
in a US 96+ vehicle but retaining the US OBD2
ecu. For those that don't know, when using
a US OBD2 ecu and the
CKF sensor is not wired in, the engine runs
like total crap. This trick basically taps
the CKF into the CKP signal.
This wire trick will save you
money (around $300) and headaches!
PROCEDURE
- Please refer to the ecu pin out page respective to your
OBD2 type and take note of the CKF pin locations:
OBD2a pin out schematics
OBD2b pin out schematics
- Get 4 Scotch-lock/tap splicers
Sometimes dubbed 'quick splice', these can be real life
savers.
Get yourself 2 of these bad boys and a pair of pliers for the squeezing-splicing portion of the job.
- Locate ECU pins
OBD2a Users:
This mod requires you to quick splice a total of 4 wires (2 wires per quick splice).
Locate the blue ecu plug "C":
Now locate pinout C1 (CKFP) and C4 (CYPP) ; using the pliers quick-splice these two wires together as
shown:
 
Then locate pin C11 (CKFM) and C14 (CYPM) and quick-splice these two wires together as
shown:
 
That's it!
Your finished OBD2a quick-splice job should look something like this:
OBD2b Users:
This mod requires you to quick splice a total of 4 wires (2 wires per quick splice).
Locate the blue ecu plug "C":
Now locate pinout C22 (CKFP) and C29 (CYPP) ; using the pliers quick-splice these two wires together as
shown:
 
Then locate pin C30 (CYPM) and C31 (CKFM); quick-splice these two wires together as
shown:
 
That's it!
Your finished OBD2b quick-splice job should look something like this:
ADDITIONAL
INFORMATION
None.
CONTRIBUTIONS / PROPS
The information in this article applies to:
- All US 96-00 civics & 96-01
integra's
|
