Code 14: ECT Circuit (Non-Scan)
(2 of 2)
1
•
•
•
•
IGNITION “OFF.”
DISCONNECT ECT SENSOR CONNECTOR.
IGNITION “ON.”
CONNECT DVM ACROSS COOLANT SENSOR HARNESS TERMINALS.
IS VOLTAGE ABOVE 4 VOLTS?
NO
YES
3
2
•
•
CONNECT POSITIVE DVM LEAD FROM HARNESS
TERMINAL “B” CKT 410 (5 VOLT REFERENCE).
CONNECT NEGATIVE DVM LEAD TO A GOOD
GROUND ON ENGINE.
IS VOLTAGE ABOVE 4 VOLTS?
INTERMITTENT CONNECTIONS
OR
FAULTY ECT SENSOR. REFER
TO DIAGNOSTIC AID CHART
FOR SENSOR VALUES
NO
YES
•
•
•
REMOVE DOVM.
IGNITION “ON.”
CONNECT A TEST LIGHT TO BATTERY
POSITIVE (B+).
OPEN SENSOR GROUND CKT 814
OR
FAULTY CONNECTION AT ECM
OR FAULTY ECM.
•
TOUCH TEST LIGHT TO SENSOR
HARNESS TERMINAL “B” (CKT 410).
IS TEST LIGHT “ON”?
NO
YES
CKT 410 OPEN
OR
FAULTY CONNECTION AT ECM
OR
•
DISCONNECT ECMJ-1
CONNECTOR.
IS TEST LIGHT “ON”?
FAULTY ECM.
YES
NO
CKT 410 SHORTED TO SENSOR GROUND
OR
FAULTY ECM.
CKT 410 SHORTED
TO GROUND.
DIAGNOSTIC AID
ECT SENSOR
TEMPERATURE TO RESISTANCE VALUES
(APPROXIMATE)
°
F
°C
100
70
38
20
4
-7
-18
-40
OHMS
185
450
1,800
3,400
7,500
13,500
25,000
100,700
210
160
100
70
40
20
0
-40
Index
90-823224--2 796
ELECTRONIC FUEL INJECTION (MULTI-PORT AND THROTTLE BODY) - 5C-87
| Categories | Mercury MerCruiser Manuals |
|---|---|
| Tags | Mercury MerCruiser 454 CID, Mercury MerCruiser 502 CID |
| Model Year | 1993, 1994, 1995, 1996, 1997 |
| Download File |
|
| Document File Type | |
| Copyright | Attribution Non-commercial |
(4 votes, average: 4.5 out of 5)
Marine readers have rated 1993 1997 Mercury-MerCruiser GM V8 454 CID 7.4L and 502 CID 8.2L Marine Engines Service Manual Number 16 4.5 out of 5.0 based on 4 product reviews. Hugely helpful service manual! Perfect. Thank you!
Manuals are all Important for Technician
This book is invaluable if you do your own repairs. Great book.
Could not find a copy until a search brought me here.
Excellent print.
Thank you