Fuse - Ford Electric Ranger 2001 Manual

303-03-5
DIAGNOSIS AND TESTING (Continued)
Symptom Chart
Symptom Chart
Condition
DTC C1774 Coolant
•
Temperature Sensor Out of
Range
Coolant Pump Does Not
•
Operate
Coolant Pump Runs With the
•
Ignition Key in the OFF
Position.
Cooling Fan Does Not
•
Operate
Cooling Fan Runs at Low
•
Speed at All Times
Cooling Fan Runs at High
•
Speed at All Times
Pinpoint Tests
Special Tool(s)
104-Pin Breakout Box (BOB) 418-049 (014-00950) or
equivalent
Dial Thermometer 023-R0007 or equivalent
PINPOINT TEST A: DTC C1774 COOLANT TEMPERATURE SENSOR OUT OF RANGE
A1 CHECK COOLANT TEMPERATURE
• With key ON, monitor the interface adapter assembly (IAA) module PID
CLNTTMP.
• Is the temperature between -40°C (-40°F) and 150°C (302°F)?
A2 VERIFY COOLANT TEMPERATURE
• Remove the radiator pressure relief cap and use Dial Thermometer to
measure the temperature of the coolant.
• Compare the actual coolant temperature to the IAA module PID
CLNTTMP.
• Is the actual temperature within 10°C (50°F) of the IAA PID
CLNTTMP?
(Continued)
Engine Cooling
Possible Sources
Circuit(s).
•
Coolant temperature sensor.
•
Interface adapter assembly
•
(IAA) module.

Fuse.

•
Circuit(s).
•
Coolant pump.
•
Interface adapter assembly
•
(IAA) module.
Circuit(s).
•
Coolant pump relay.
•
Interface adapter assembly
•
(IAA) module.
Fuse.
•
Circuit(s).
•
Cooling fan.
•
Interface adapter assembly
•
(IAA) module.
Fan low speed relay.
•
Fan high speed relay.
•
Circuit(s).
•
Fan low speed relay.
•
Interface adapter assembly
•
(IAA) module.
Circuit(s).
•
Fan high speed relay.
•
Interface adapter assembly
•
(IAA) module.
TEST STEP
Action
GO to Pinpoint Test A.
•
GO to Pinpoint Test B.
•
GO to Pinpoint Test C.
•
GO to Pinpoint Test D.
•
GO to Pinpoint Test E.
•
GO to Pinpoint Test F.
•
ACTION TO TAKE
Yes = GO to A2.
No = GO to A3.
Yes = System OK. CHECK wiring
for intermittent connections.
GO to A5.
No =
2001 Ranger EV, 01/2001
303-03-5