GENERAL SYSTEM DIAGNOSTICS
SERVICE MANUAL NUMBER 23
Discrete Input Circuit Check - Non-Scan 454 / 502 Mag MPI and 8.2L MP Only
(5 of 5)
TESTING FOR OPEN CIRCUITS
STEP
ACTION
VALUE
YES
NO
PROCEED TO
1.
switch.
2.
Disconnect PUR wire from oil pressure
Disconnect TAN/WHT wire from gear
lube monitor.
3. Disconnect BLU/TAN wire from transmis-
sion temperature switch (if equipped).
1
4.
5.
that was disconnected.
Key “ON”, engine “OFF”.
One at a time, touch each wire to ground
(–)
Does audio warning buzzer sound when
grounding BLU/TAN wire from oil pressure
switch?
Step 3
Step 3
Step 3
Step 2
Step 2
Step 2
Does audio warning buzzer sound when
grounding BLU/TAN wire from gear lube
switch?
Does audio warning buzzer sound when
grounding BLU/TAN wire from transmission
switch?
1.
2.
3.
Key “OFF”.
Disconnect ECM J1 connector.
Check for continuity between all wires
2
disconnected in “Step 1” and terminal J1-6.
Is there continuity on BLU/TAN wire from
oil pressure switch?
Step 3
Step 3
Step 3
Step 4
Step 4
Step 4
Is there continuity on BLU/TAN wire from
gear lube switch?
Is there continuity on BLU/TAN wire from
transmission switch?
3
4
Circuit(s) is not open.
Repair open circuit.
–
–
–
–
NOTE: The ECM should only be replaced after all switches and circuits have been tested
and found to be functioning properly.
Index
Page 5E-96
90-861326--1 MARCH 1999
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 454 CID, Mercury MerCruiser 502 CID |
| Model Year | 1998, 1999, 2000, 2001 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
(1 votes, average: 5 out of 5)
Marine readers have rated Mercury MerCruiser GM V8 GM V8 454 CID 7.4L and 502 cid 8.2L Marine Engines Service Manual Number 23 5.0 out of 5.0 based on 1 product reviews. Just need the manual. Wrote review. Can't technically review what I haven't seen yet...