| anywhere. In fact, the only 8 pin IC chips i see are: On the smaller daughterboard:
NEC C277C On the larger mainboard:
5233 0X4
5233 063
945B 0X1 I'm starting to think it may be located in the device to the right of the ECU. It has to be somewhere - maybe this is why changing ECU's does not solve the problem. I found a very detailed schematic of the actual ECCS (ECU) which shows the pinouts on the ECU and how they connect to the check control (OBDI Port):  Furthermore according to this pic - pin 31 on the ECU goes to "Diagnostic Power". When I try to trace it it doesn't seem to go to any of the IC's. I think someone needs to trace out where these OB port leads actually are going. I couldn't really determine this from any of the wiring diagrams
Here are the other IC's I saw: Daughterboard (JECS) - A19-051M00
NEC PC451C 14 PIN (Two of these)
NEC C277C 8 PIN Mainboard (JECS) - A19-001 MII A19-257 009
9042KK005
60pin A19-257 012
041100
60 pin HITACHI OD1 J
HD63C03YCP
60 PIN HITACHI OK1 SJ
HD63140CP
60 PIN TD 045
62709F
16 PIN 5233 0X4
8 PIN 5233 063
8 PIN 945B 0X1
8 PIN MITSUBISHI 5224
04E0
14 PIN NEC 1074G
16 pin
_____________________
2006 Scion tC (Sold)
2004 Yamaha YZF-R6 (Sold)
2003 Nissan 350Z Track (Sold)
2000 BMW X5 4.4i
1993 300ZX Twin Turbo
1985 Nissan 300ZX NA (Sold)
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