I am getting a code 54 in my 98 GSR with a JRSC LS motor running the OBD2 P75 LS ecu. I think that it corresponds to a CKF malfunction which is the Crankshaft Speed Fluctuation sensor. What do I do about this? I didn't think the LS motor had this sensor and I am running the correct LS ecu, so why am I throwing a code for this?

What can I do about it? I was thinking it has something to do with the fact that the car is a GSR, but I figured that by running the LS motor and correct LS ecu that I shouldn't throw any codes for parts that aren't on the motor.

 

If you use an OBD-1 P74 ECU, it won't throw the code b/c they don't look for the CKF sensor.

 

I guess my question is, why am I even throwing that code? The actual motor, harness and ECU is for an OBD2 LS car. The car itself is a GSR though. I didn't think the LS motors had this sensor, so why am I throwing a code for this sensor when I use an LS ecu?

Someone's gotta be able to help me here....

 

Doesn't matter if it's a B18C or B18B ECU/motor, both use the CKF sensor.

Maybe the chasis harness doesn't have the wiring for it.

Check for continuity b/w the ECM and CKF sensor harness.

 

Ok I'll check for that. I guess its possible that the sensor is messed up then. I just didn't think that the B18b motor had that sensor....

What sensor is it that the b18c motor has that the b18b doesn't have? Is it the Crank Position Sensor?

 

KS, IAB, VTM, and VPS.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by IN VTEC &raquo;</TD></TR><TR><TD CLASS="quote">KS, IAB, VTM, and VPS.</TD></TR></TABLE>

Thanks and I think I just found my problem!!!!

For everyone that may want to know:

The 98 GSR chassis harness puts the CKF sensor in a different place then the 96 LS engine harness. 2 wires must be re-pinned to allow the ECU and engine harness to match up.

Hope this helps someone else

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by bitzbp &raquo;</TD></TR><TR><TD CLASS="quote">I guess my question is, why am I even throwing that code? The actual motor, harness and ECU is for an OBD2 LS car. The car itself is a GSR though. I didn't think the LS motors had this sensor, so why am I throwing a code for this sensor when I use an LS ecu?
</TD></TR></TABLE>

Just for the record, the only thing that makes your car a GS-R right now is the VIN, since other than that the only thing that makes an Integra a GS-R is the motor.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by PatrickGSR94 &raquo;</TD></TR><TR><TD CLASS="quote">
Just for the record, the only thing that makes your car a GS-R right now is the VIN, since other than that the only thing that makes an Integra a GS-R is the motor. </TD></TR></TABLE>

Thanks captain obvious, and for the record I'm not gay but this guy LOVES the ****