2G Socket Checkpoints

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 EPROM 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):

EPROM	IC2	IC1	Notes
01	25	63
02	28	60
03	34	55
04	35	54
05	36	53
06	37	52
07	38	51
08	39	50
09	40	49
10	41	48
11	45	11
12	46	12
13	47	13
14			GND
15	48	14
16	49	15
17	50	16
18	51	17
19	52	18
20			GND
21	30	58
22	44		100 ohms
23	29	59
24	31	57
25	32	56
26	27	61
27	26	62
28			+5V

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