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
| 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 |
(1 votes, average: 4 out of 4)
Marine readers have rated Mercury MerCruiser Engines Service Manual Number 24 GM V-8 305 CID 350 CID 4.0 out of 4.0 based on 1 product reviews. Great performance engine.
Class 1