SERVICE MANUAL NUMBER 24
DIAGNOSTICS
Code 14 (3 of 3): Engine Coolant Temperature (ECT) Sensor Circuit
Step
Action
Yes
No
PROCEED TO
a. Remove DVOM.
b. Ignition ON.
10.
c. Connect a test light to battery positive (B+).
d. Touch test light to sensor harness terminal “B” CKT 410.
Is test light on?
Step 13. Step 11.
Locate and repair open in CKT 410 or faulty connection
at ECM.
11.
12.
–
–
Locate and repair Intermittent connections or replace
faulty ECT sensor (refer to chart below for sensor val-
ues).
–
–
For MEFI 1 and 2, disconnect J-1 connector.
For MEFI 3, disconnect J-2 connector.
Is test light on?
13.
Step 14. Step 15.
14.
15.
CKT 410 shorted to ground. Locate and repair short.
–
–
–
–
CKT 410 shorted to sensor ground or faulty ground. Lo-
cate and repair.
Locate and repair open sensor ground in CKT 814 or
faulty connection at ECM.
16.
–
–
ENGINE COOLANT TEMPERATURE SENSOR CHART
ECT Sensor
Temperature - to - Resistance Values
(Approximate)
°
F
°C
OHMS
210
160
100
70
40
20
100
70
38
20
4
-7
-18
-40
185
450
1,800
3,400
7,500
13,500
25,000
100,700
0
-40
Index
90-861327--1
OCTOBER 1999
Page 5G-55
| 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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