S300 cel light, error code

srcracing · Post by **srcracing** » Wed Oct 31, 2007 5:20 am

98 Prelude H22 supercharged, Hondata OBDII computer with internal OBD I to II plug, S300, socketed by Hondata. DTC error #9. I've checked triggers and wiring at ECU connecter with osciliscope and have a good wave forum. Any ideas why I still have CEL and error code?

Post by **Spunkster** » Mon Nov 05, 2007 11:46 am

Some Preludes have a wiring change that is not documented anywhere. You will have to check the distributor wiring using a multimeter to make sure they are going to the right places on the ecu. No one has ever let us know what the exact resolution to the problem was.

srcracing · Post by **srcracing** » Tue Nov 06, 2007 3:51 pm

What wave forms should I see, for these triggers? TDC, (I would think 1 ref per tdc event) CKP (24 evemts per 720 degrees), CYP (1 event just before #1 TDC) Is this correct?