Hyundai Sonata 1991 Shop Manual page 241

Electronic Control Unit (ECU)
MPI SYSTEM
V310BOA
Based on the information from various sensors, the ECU determines (computes) an optimum control for varying
operating conditions and accordingly drives the output actuators.
The ECU consists of an 8-bit microprocessor, random access memory (RAM), read only memory (ROM) and inpu-
t/output (I/O) interface.
ECU
HMC Part No.
r -
-
r - -
Abbr. Type Name
I
Micro I
"
5
Lot No.
"
processor
."
5
"
'"
10
"'
2
Jl
~
1i :>
c:
:;;
13
J
" E
"'
."g
' "
o'~~
:;
:;
~
::;;
::;; :;
:;
0.
<>:
a
0.
0.
E
0. :;
:;
,
~~
c:
0: 0:
L.....-
a
a
J
' - - ' - - '---
31YOO3
0
31YOO4
nr
C02-3
If
III
C02-2
U-
L
C02-1
U
Q
5 4 3 2 1
9 8 7 6 5 4 3 2 1
12 11 10 9 8 7 6 5 4 3 2 1
~
098 7 6 18 716 15 14 13 12 11 10 24 23 22 21 20 19
514 817 16
13
II
II
II
31YOOS
C02-3
C02-2
C02-1
1. N.A (NOT AVAILABLE)
1. ISC MOTOR (EXT)
1. SPARK TIMING ADJUST (+)
2. N. SW.
2. ISC MOTOR (RET)
2. NA
3. BAn (BACK-UP SOURCE)
3. N.A.
3 AIR FLOW SENSOR
4. FUEL PUMP RELAY
4. NA
4. BAn
5. N.A.
5. A.T.S.
5. GND
6. IG. COIL (POWER TR)
6. A/C SIG.
6. NA
7. EGR SOLENOID (CAL. only)
7.I.D.SW.
7. FUEL PUMP RELAY SG
8 INJ. #2 CYL.
B. PIS SW.
B. ST SG.
9. INJ #1 CYL.
9. 0, SG.
10 NA
10. NA
9. BAn
11. N.A.
11. DIAGNOSIS CONTROL SG.
10. GND 12. N.A.
12. DIAGNOSIS
13. A/C RELAY (POWER)
13. SENSOR GND
14. EMISSION INDICATOR LAMP
14. SENSOR SOURCE (5V)
(U.SA only)
15. CYL. DETECT SG.
15. N.A.
16 CRANK ANGLE
16. PURGE SOLENOID
17. W.T.S.
17. INJ. #4 CYL.
18. T.P.S
18. INJ. #3 CYL.
19. VEHICLE SPEED (0 Km/h)
20. ISC MOTOR POSITION SENSOR
21. B.P.S.
22. EGR TEMp. SENSOR (CAL. only)
23. SENSOR GND
24. SENSOR SOURCE (+)
CAL: California
* Mark is gold plating terminal
31-16