Mercury MerCruiser MCM 454 Mag MPI Service Manual page 607

GENERAL SYSTEM DIAGNOSTICS
MEFI 1 - 454/502 Mag MPI and 8.2L MPI Symptom Chart (J-2 Circuits)
(Continued)
Pin
J2-22
J2-23
J2-24
J2-25 Not Used
J2-26 Not Used
J2-27
J2-28
J2-29
J2-30 Not Used
J2-31
J2-32 Not Used
Index
Page 5E-14
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Circuit
Pin Pin (CKT) (CKT) Wire Wire
Color Ignition
Function Number
(#)
Port Fuel
901 WHT
Jumper
Ignition
423 WHT
Control
Signal
Ignition
TAN/
424
Control
BLK
Bypass
–
–
Discrete
31 TAN
Switch
Signal
IAC "A" BLU/
441
High WHT
IAC "B" GRN/
444
Low BLK
–
MIL BRN/
419
Lamp WHT
–
Normal Voltage
Engine
ON Running
– –
0
1.2V
(NOTE 5)
0
4.5V
(NOTE 5)
– – –
– – –
– –
Not Not
Usable Usable
Not Not
Usable Usable
– – –
0 0
(NOTE 5) (NOTE 5)
– – –
SERVICE MANUAL NUMBER 23
Diagnostic
Trouble Tro ble Possible Possible
Codes Symptoms
DTC(s)
– –
Stall, Will
Restart In
42 Bypass
Mode, Lack
Of Power
Lack Of
42
Power,
Fixed Timing
– –
– –
Audio Warn-
–
ing System
Activated
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