Ford Ranger EV (2001 year). Manual — part 56

303-03-2

303-03-2

Engine Cooling

SPECIFICATIONS

Torque Specifications

General Specifications

Description

Nm

Lb-Ft

Lb-In

Item

Specification

Coolant pump bolt

11

8

—

Cooling System Capacity

11.36 l (3 gal)

Coolant tube clamp

7

—

62

Premium Cooling System

ESE-M97B44-A

screws

Fluid E2FZ-19549-AA

Radiator fan bolts

6

—

54

Pressure Relief Cap

110.5 kPa (16 psi)

DESCRIPTION AND OPERATION

Cooling System

Item

Part Number

Description

Item

Part Number

Description

5

—

Motor/Transaxle

1

—

Radiator

6

—

Traction Inverter Module

2

—

A/C Inverter Motor Controller

(TIM)

3

—

Coolant Temperature Sensor

7

—

Coolant Pump

4

—

Direct Current to Direct

Current (DC/DC) Converter

(Continued)

303-03-3

303-03-3

Engine Cooling

DESCRIPTION AND OPERATION (Continued)

The cooling system removes heat from various

The interface adapter assembly (IAA) controls the

electronic components. The coolant pump has a

operation of the electric coolant pump and the

centrifugal impeller design with a 12-volt permanent

electric radiator fan, based upon vehicle coolant

magnet motor. The pump is used to circulate the

temperature. The IAA receives the temperature

coolant through the DC/DC module,

information from the coolant temperature sensor,

motor/transaxle, and the traction inverter module

which is located near the coolant pump. The pump

(TIM). In an Electric Ranger equipped with air

circulates coolant through the vehicle using a

conditioning, coolant is also circulated through the

combination of rubber hoses and metal tubing. The

A/C inverter motor controller. Because of the

IAA energizes the pump whenever the ignition key

Electric Rangers unique systems, vehicle coolant is

is in the ON position and during traction battery

not used in the heating/defrosting system.

charging if the DC/DC module is charging the
auxiliary 12-volt battery. The electric fan is also
controlled by the IAA. If the coolant temperature
exceeds 40

°

C (104

°

F), the cooling fan runs at low

speed. If the coolant temperature rises above 45

°

C

(113

°

F), the cooling fan runs at high speed. The

IAA turns the cooling fan off when the coolant
temperature is less than 35

°

C (95

°

F). The IAA will

also activate the fan during vehicle charging if the
DC/DC module is charging the auxiliary battery, or
when the air conditioning is operated.

Cooling System —Postal Ranger EV

Item

Part Number

Description

Item

Part Number

Description

4

—

Motor/Transaxle

1

—

Radiator

5

—

Traction Inverter Module

2

—

Coolant Temperature Sensor

(TIM)

3

—

Direct Current to Direct

6

—

Coolant Pump

Current (DC/DC) Converter

(Continued)

303-03-4

303-03-4

Engine Cooling

DESCRIPTION AND OPERATION (Continued)

The cooling system removes heat from various

The interface adapter assembly (IAA) controls the

electronic components. The coolant pump has a

operation of the electric coolant pump and the

centrifugal impeller design with a 12-volt permanent

electric radiator fan, based upon vehicle coolant

magnet motor. The pump is used to circulate the

temperature. The IAA receives the temperature

coolant through the DC/DC module,

information from the coolant temperature sensor,

motor/transaxle, and the traction inverter module

which is located near the coolant pump. The pump

(TIM). Because of the Electric Rangers unique

circulates coolant through the vehicle using a

systems, vehicle coolant is not used in the

combination of rubber hoses and metal tubing. The

heating/defrosting system.

IAA energizes the pump whenever the ignition key
is in the ON position and during traction battery
charging if the DC/DC module is charging the
auxiliary 12-volt battery. The electric fan is also
controlled by the IAA. If the coolant temperature
exceeds 40

°

C (104

°

F), the cooling fan runs at low

speed. If the coolant temperature rises above 45

°

C

(113

°

F), the cooling fan runs at high speed. The

IAA turns the cooling fan off when the coolant
temperature is less than 35

°

C (95

°

F). The IAA will

also activate the fan during vehicle charging if the
DC/DC module is charging the auxiliary battery.

Electrical Schematic

DIAGNOSIS AND TESTING

Cooling System

Refer to Electrical and Vacuum Troubleshooting
Manual, Cell 33, Cooling System for schematic and

Diagnostic Trouble Code (DTC) Definition

connector information.

The following DTC relates to the Cooling System:

Inspection and Verification

•

DTC C1774 Coolant Temperature Sensor Out of

g to

Section 100-07

.

Range
— The interface adapter assembly (IAA) module

operates the radiator cooling fan based on
coolant temperature. The IAA module uses the
coolant temperature sensor to monitor the
coolant temperature. The normal range of the
coolant temperature sensor is between -40

°

C

(-40

°

F) and 150

°

C (302

°

F). If the coolant

temperature sensor is reading out of range, the
IAA module sets DTC C1774.

303-03-5

303-03-5

Engine Cooling

DIAGNOSIS AND TESTING (Continued)

Symptom Chart

Symptom Chart

Condition

Possible Sources

Action

•

DTC C1774 Coolant

•

Circuit(s).

•

GO to

Pinpoint Test A.

Temperature Sensor Out of

•

Coolant temperature sensor.

Range

•

Interface adapter assembly

(IAA) module.

•

Coolant Pump Does Not

•

Fuse.

•

GO to

Pinpoint Test B.

Operate

•

Circuit(s).

•

Coolant pump.

•

Interface adapter assembly

(IAA) module.

•

Coolant Pump Runs With the

•

Circuit(s).

•

GO to

Pinpoint Test C.

Ignition Key in the OFF

•

Coolant pump relay.

Position.

•

Interface adapter assembly

(IAA) module.

•

Cooling Fan Does Not

•

Fuse.

•

GO to

Pinpoint Test D.

Operate

•

Circuit(s).

•

Cooling fan.

•

Interface adapter assembly

(IAA) module.

•

Fan low speed relay.

•

Fan high speed relay.

•

Cooling Fan Runs at Low

•

Circuit(s).

•

GO to

Pinpoint Test E.

Speed at All Times

•

Fan low speed relay.

•

Interface adapter assembly

(IAA) module.

•

Cooling Fan Runs at High

•

Circuit(s).

•

GO to

Pinpoint Test F.

Speed at All Times

•

Fan high speed relay.

•

Interface adapter assembly

(IAA) module.

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

TEST STEP

ACTION TO TAKE

A1 CHECK COOLANT TEMPERATURE

•

With key ON, monitor the interface adapter assembly (IAA) module PID

Yes =

GO to A2.

CLNTTMP.

•

Is the temperature between -40

°

C (-40

°

F) and 150

°

C (302

°

F)?

No =

GO to A3.

A2 VERIFY COOLANT TEMPERATURE

•

Remove the radiator pressure relief cap and use Dial Thermometer to

Yes =

System OK. CHECK wiring

measure the temperature of the coolant.

for intermittent connections.

•

Compare the actual coolant temperature to the IAA module PID

No =

GO to A5.

CLNTTMP.

•

Is the actual temperature within 10

°

C (50

°

F) of the IAA PID

CLNTTMP?

(Continued)