Mercury 305 CID - Page 572

ELECTRONIC FUEL INJECTION (MULTI-PORT AND THROTTLE BODY) - 5E-3190-823225--1 1096
ECM Connector and EFI Symptoms Chart (J-2 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
J2-17
Not
Used
– – – – – –
J2-18
Not
Used
– – – – – –
J2-19
Not
Used
– – – – – –
J2-20
Fuel
Injector
Ground
450
BLK/
WHT
0
(NOTE 5)
0
(NOTE 5)
None
Rough Running, Poor Idle, Lack
Of Performance
J2-21
Injector
Driver
467
DK
BLU
B+ B+ None
Rough Idle, Lack Of Power,
Stalling
J2-22
Port
Fuel
Jumper
901 WHT – – – –
J2-23
Ignition
Control
Signal
423 WHT
0
(NOTE 5)
1.2V 42
Stall, Will Restart In Bypass
Mode, Lack Of Power
J2-24
Ignition
Control
Bypass
424
TAN/
BLK
0
(NOTE 5)
4.5V 42 Lack Of Power, Fixed Timing
J2-25
Not
Used
– – – – – –
J2-26
Not
Used
– – – – – –
J2-27
Discrete
Switch
Signal
31 TAN – – – Audio Warning System Activated
J2-28
IAC
“A”
High
441
BLU/
WHT
Not
Usable
Not
Usable
None Rough Unstable or Incorrect Idle
J2-29
IAC
“B”
Low
444
GRN/
BLK
Not
Usable
Not
Usable
None Rough Unstable or Incorrect Idle
J2-30
Not
Used
– – – – – –
J2-31
MIL
Lamp
419
BRN/
WHT
0
(NOTE 5)
0
(NOTE 5)
None Lamp Inoperative
J2-32
Not
Used
– – – – – –
NOTE: J2-22 is not used on the Throttle Body Injection system.
See page 5E-27 for NOTES