Mercury 305 CID - Page 570

ELECTRONIC FUEL INJECTION (MULTI-PORT AND THROTTLE BODY) - 5E-2990-823225--1 1096
ECM Connector and EFI Symptoms Chart (J-1 Circuits)
Pi
Pin
Circuit
(CKT)
N
Wire
Normal Voltage
Diag-
nostic
Tbl
Possible
Pin
Func-
tion
()
Num-
ber
(#)
Wire
Color
Ignition
ON
Engine
Running
Trouble
Codes
DTC(s)
Possible
Symptoms
J1-17
Not
Used
– – – – – –
J1-18
Serial
Data
461
ORN/
BLK
5V 5V None
No Serial Data
(NOTE 6)
J1-19
Not
Used
– – – – – –
J1-20
Not
Used
– – – – – –
J1-21
Lanyard
Stop
Switch
942 PNK 0 0 NONE No Start
J1-22
Not
Used
– – – – – –
J1-23
Not
Used
– – – – – –
J1-24
IAT
Sensor
472 TAN 5V (NOTE 2) 23
Poor Fuel Economy, Exhaust
Odor
J1-25
Not
Used
– – – – – –
J1-26
Not
Used
– – – – – –
J1-27
Not
Used
– – – – – –
J1-28
Not
Used
– – – – – –
J1-29
MAP
Ground
814 BLK
0
(NOTE 5)
0
(NOTE 5)
33
Lack Of Performance,Exhaust
Odor, Stall
J1-30
ECM
Ground
450
BLK/
WHT
0
(NOTE 5)
0
(NOTE 5)
None No Start
J1-31
MAP 5V
Refer-
ence
416 GRY 5V 5V 33
Lack Of Power, Surge, Rough
Idle, Exhaust Odor
J1-32 Battery 440 ORN B+ B+ None No Start
NOTE: The Intake Air Temperature (IAT) Sensor [J1-24] is not used on the Throttle Body Injection system. J1-21
is not used on 1997 and newer models.
See page 5E-27 for NOTES