Mercury MerCruiser MCM 454 Mag MPI Service Manual page 623

GENERAL SYSTEM DIAGNOSTICS
MEFI 2 - 7.4L MPI Symptom Chart (J-1 Circuits) (Continued)
Pin
J2-26
J2-27 Not Used
J2-28
J2-29
J2-30 Not Used
J2-31
J2-32 Not Used
Index
Page 5E-30
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Circuit
(CKT) (CKT)
Pin Pin Wire Wire
Number Color Ignition
Function
(#)
Discrete
31
Switch
GRN
Signal
–
IAC "A"
441
BLU/
High
WHT
IAC "B"
444
GRN/
Low
BLK
–
MIL BRN/
419
Lamp WHT
–
Normal Voltage
Engine
ON Running
DK
– –
– – –
LT
Not Not
Usable Usable
LT
Not Not
Usable Usable
– – –
0 0
(NOTE 5) (NOTE 5)
– – –
SERVICE MANUAL NUMBER 23
Diagnostic
Tro ble Trouble
Possible Possible
Codes
Symptoms
DTC(s)
Audio Warn-
ing System
Activated
–
Audio Warn-
ing to Buzz-
er
–
Rough Un-
None
stable or In-
correct Idle
Rough Un-
None
stable or In-
correct Idle
– –
Lamp Inop-
None
erative
– –
90-861326--1 MARCH 1999