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buzzingout2gsocket

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Overview

With a 2G ECU, when removing the EPROM it's entirely possible to damage a track on the top of the board and still allow the engine to run, but cause a number of malfunctions.

If the engine runs, it indicates that the connections between the processor (IC1) and the ERPOM are okay.

Details

Check for continuity of the tracks to the EPROM as follows (note that there is a 100 ohm series resistor between EPROM pin 22 and IC2 pin 44):

EPROMIC2IC1Notes
012563
022860
033455
043554
053653
063752
073851
083950
094049
104148
114511
124612
134713
14 GND
154814
164915
175016
185117
195218
20 GND
213058
2244 100 ohms
232959
243157
253256
262761
272662
28 +5V

Pin numbers for IC1 and IC2 are printed on the PC board. The EPROM pins are numbered as follows:

buzzingout2gsocket.1201099474.txt.gz · Last modified: 2008/01/23 09:44 by 76.100.119.159