Mercury 305 CID - Page 642

ELECTRONIC FUEL INJECTION (MULTI-PORT AND THROTTLE BODY) - 5E-10190-823225--1 1096
Code 14: ECT Circuit (Scan)
(2 of 2)
• IGNITION “ON.”
DOES SCAN TOOL DISPLAY A COOLANT
TEMPERATURE VALUE GREATER THAN
266
°F (130°C) OR LESS THAN –22°F (–30°C)?
1
YES NO
CKT 410 SHORTED TO GROUND
OR
FAULTY ECM.
CODE 14 IS INTERMITTENT. IF NO
ADDITIONAL CODES WERE STORED,
REFER TO “DIAGNOSTIC AIDS” ON
FACING PAGE.
NO YES
• IGNITION “OFF.”
• DISCONNECT COOLANT TEMPERATURE
SENSOR.
• JUMPER TERMINALS “A” AND “B”
TOGETHER.
• IGNITION “ON.”
• SCAN TOOL SHOULD DISPLAY
COOLANT TEMPERATURE ABOVE 266°F
(130°C).
DOES IT?
COOLANT TEMPERATURE
SCAN DISPLAY LESS
THAN –22°F (–30°C).
COOLANT TEMPERATURE
SCAN DISPLAY GREATER
THAN 266°F (130°C).
• IGNITION “OFF.”
• DISCONNECT ENGINE COOLANT TEMPERATURE (ECT)
SENSOR.
• IGNITION “ON.”
• SCAN TOOL SHOULD DISPLAY COOLANT
TEMPERATURE BELOW –22°F (–30°C).
DOES IT?
NO YES
REPLACE ENGINE
COOLANT
TEMPERATURE
SENSOR.
CKT 410 OPEN
OR
SENSOR GROUND
OPEN
OR
FAULTY ECM.
2
REPLACE ENGINE
COOLANT
TEMPERATURE
SENSOR.