Mercury MerCruiser Engines Service Manual Number 24 GM V-8 305 CID 350 CID

SERVICE MANUAL NUMBER 24
DIAGNOSTICS
Code 15 (2 of 2): Engine Coolant Temperature (ECT) Sensor Circuit
Step
Action
Yes
No
PROCEED TO
Was the “On-Board Diagnostic” (OBD) System Check
Performed?
1.
2.
Step 2.
OBD
Are you using a Scan Tool?
Step 3.     Step 5.
Ignition ON.
3.
Does the scan tool display a coolant temperature
greater than 266°F (130°C)?
Step 4.     Step 6.
a.   Ignition OFF.
b.   Disconnect ECT harness connector.
c.   Ignition ON, engine OFF.
4.
Does scan tool display a coolant temperature below
Step 6.     Step 7.
-22
°F (-30°C)?
a.   Ignition OFF.
b.   Disconnect ECT sensor harness terminals.
c.   Ignition ON, engine OFF.
5.
d.   Connect DVOM across the coolant sensor harness ter-
minals.
Is voltage above 4 Volts?
Step 6.     Step 7.
Locate and repair intermittent faulty connections or
replace faulty ECT sensor.
6.
7.
Verify
Locate and repair short to ground in CKT 410 or repair
faulty ECM connections.
Repair
Was a problem found?
Index
90-861327--1
OCTOBER 1999
Page 5G-57
Product Specification
CategoriesMercury MerCruiser Manuals
Tags,
Model Year1998, 1999, 2000, 2001
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Mercury MerCruiser Engines Service Manual Number 24 GM V-8 305 CID 350 CID SKU UPC Model
Fernando Woll on Dec 09, 2014. Boat Engine

Great performance engine.
Class 1


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