Mercury 305 CID - Page 569

90-823225--1 10965E-28 - ELECTRONIC FUEL INJECTION (MULTI-PORT AND THROTTLE BODY)
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
J1-1
Knock
Sensor
Signal
485 BLK 9.5V 9.5V 43
Poor Fuel Economy,
Poor Performance
Detonation
J1-2
ECT
Signal
410 YEL
1.95V
(NOTE 2)
1.95V
(NOTE 2)
14
Poor Performance,
Exhaust Odor, Rough Idle
RPM Reduction
J1-3
Not
Used
– – – – – –
J1-4
Not
Used
– – – – – –
J1-5
Master/
Slave
916 YEL B+ B+ None
Lack Of Data From Other Engine
(Dual Engine Only)
J1-6
Discrete
Switch
931 BRN – – None Power Reduction Mode
J1-7
Diag-
nostic
Test
451
WHT/
BLK
B+ B+ None Incorrect Idle, Poor Performance
J1-8
Not
Used
– – – – – –
J1-9
Map
Signal
432
LT
GRN
4.9V
1.46V
(NOTE 3)
33
Poor Performance, Surge, Poor
Fuel Economy, Exhaust Odor
J1-10
TP
Signal
417
DK
BLU
.62V
(NOTE 4)
.62V
(NOTE 4)
21
Poor Performance And Accelera-
tion, Incorrect Idle
J1-11
Ignition
Fused
439
PNK/
BLK
B+ B+ None No Start
J1-12
Not
Used
– – – – – –
J1-13
TP and
IAT
Ground
813 BLK
0
(NOTE 5)
0
(NOTE 5)
21,23
High Idle, Rough Idle, Poor Perfor-
mance Exhaust Odor
J1-14
ECM
Ground
450
BLK/
WHT
0
(NOTE 5)
0
(NOTE 5)
None No Start
J1-15
TP 5V
Refer-
ence
416 GRY 5V 5V 21 Lack Of Power, Idle High
J1-16 Battery 440 ORN B+ B+ None No Start
See Page 5E-27 For NOTES