SERVICE MANUAL NUMBER 24
DIAGNOSTICS
Discrete Input Circuit Check (5 of 5)
TESTING FOR OPEN CIRCUITS
Step
Action
Yes
No
PROCEED TO
a. Disconnect BLU/TAN or BLU wire from oil pressure
switch.
b. Disconnect BLU/TAN or TAN/WHT wire from gear lube
monitor.
c. Disconnect BLU/TAN wire from transmission tempera-
ture switch (if equipped).
d. Key ON, engine OFF.
e. One at a time, touch each wire to ground (–) that was
disconnected.
1.
Step 3.
Step 2.
Does audio warning buzzer sound when grounding
MEFI 1 or MEFI 2 BLU/TAN or MEFI 3 BLU wire from
oil pressure switch?
Does audio warning buzzer sound when grounding
MEFI 1 or MEFI 2 BLU/TAN or MEFI 3 TAN/WHT wire
from gear lube switch?
Does audio warning buzzer sound when grounding
BLU/TAN wire from transmission switch?
a. Key OFF.
b. Disconnect ECM connectors.
Is there continuity on MEFI 1 or MEFI 2 BLU/TAN or
MEFI 3 BLU wire from oil pressure switch to ECM
CKT?
2.
Step 3.
Step 4.
Is there continuity on MEFI 1 or MEFI 2 BLU/TAN or
MEFI 3 TAN/WHT wire from gear lube switch to ECM
CKT?
Is there continuity on BLU/TAN wire from transmis-
sion switch to ECM CKT?
3.
4.
Circuit(s) is not open.
Repair open circuit.
–
–
–
–
Index
90-861327--1
OCTOBER 1999
Page 5G-51
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 305 CID, Mercury MerCruiser 350 CID |
| Model Year | 1998, 1999, 2000, 2001 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
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