Ford Ranger EV (2001 year). Manual — part 74
412-02-1
412-02-1
Heating and Ventilation
SECTION 412-02 Heating and Ventilation
VEHICLE APPLICATION:
Ranger EV
CONTENTS
PAGE
SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . ...
DESCRIPTION AND OPERATION
Heating/Defrosting . . . . . . . . . . . . . . . . . . . . ....
Heating/Defrosting —Postal Ranger EV . . . . . . . . . . . . . . ...
DIAGNOSIS AND TESTING
Heating/Defrosting/Ventilation System . . . . . . . . . . . . . . . .
Electrical Schematic . . . . . . . . . . . . . . . . . . . ...
Inspection and Verification . . . . . . . . . . . . . . . . . .
Pinpoint Tests . . . . . . . . . . . . . . . . . . . . . ...
Symptom Chart . . . . . . . . . . . . . . . . . . . . . .
REMOVAL AND INSTALLATION
PTC Heater Core —Electric Ranger . . . . . . . . . . . . . . . .
PTC Heater Core —Postal Ranger EV . . . . . . . . . . . . . . ..
412-02-2
412-02-2
Heating and Ventilation
SPECIFICATIONS
Torque Specifications
Torque Specifications
Description
Nm
Lb/In
Description
Nm
Lb/In
Positive Temperature
3
26.5
Evaporator Housing Nuts
4
35.5
Coefficient Heater Core Cover
Heater Plenum Retaining Nuts
4
35.5
Screws
High-Voltage Power
2
18
Reservoir Nuts and Bolts
7
62
Distribution Box Cover Screws
(Continued)
The PTC heater is located in the standard Ranger
DESCRIPTION AND OPERATION
heater core assembly located on the LH side of the
Heating/Defrosting
dash panel. High-voltage DC is fed to the PTC
A positive temperature coefficient (PTC) heater is
heater by the PTC switching module. The PTC
used to heat the passenger compartment and defrost
heater is equipped with an overtemperature sensor,
the windshield on the Electric Ranger. The PTC
and the air that is circulated through the heater is
heater uses a two-stage electrical resistance heater
filtered through an unique climate control filter to
that operates on high-voltage direct current (DC).
prevent possible ignition of dirt or dust build-up on
At temperatures above 4
°
C (40
°
F), the first stage of
the heater. The heater will maintain the passenger
the PTC heater will operate to heat the passenger
compartment at a maximum of 26.5
°
C (85
°
F) in
compartment. At temperatures below 4
°
(40
°
F), both
order to conserve traction battery power.
stages of the PTC heater will operate.
The Postal Ranger EV has an unique feature called
The PTC heater is located in the standard Ranger
a Pre-Heat Function. The pre-heat function allows
heater core location, and high-voltage DC is fed to
for heating/defrosting while the vehicle is in the
the PTC heater by the PTC switching module. The
KEY-OFF position to help conserve battery energy.
PTC heater is equipped with an overtemperature
This feature will operate when the vehicle is
sensor, and the air that is circulated through the
connected to the charging station and the outside
heater is filtered through an climate control filter to
temperature is 18
°
C (64
°
F) or below. The button for
prevent possible ignition of dirt or dust build-up on
pre-heat is located to the left of the heater controls,
the heater. The heater will maintain the passenger
above the recirculation button. To activate, push the
compartment at a maximum of 26.5
°
C (85
°
F) in
button once. Heating is limited to 30 minutes of
order to conserve traction battery power.
operation per activation. This function will
automatically default the temperature control to full
heat and set the fan speed. The fan speed is
Heating/Defrosting —Postal Ranger
dependent on the temperature inside the vehicle.
EV
Direction of airflow can be controlled using the
A positive temperature coefficient (PTC) heater is
mode selector knob. While the pre-heat function is
used to heat the passenger compartment and defrost
on, the vehicle will be in recirculation mode. To
the windshield on the Postal Ranger EV. The PTC
turn the pre-heat off, disconnect the vehicle from
heater uses a two-stage electrical resistance heater
the charging station, put the vehicle in the KEY-ON
that operates on high-voltage direct current (DC).
position or wait until the 30 minutes have passed.
At temperatures above 4
°
C (40
°
F), the first stage of
the PTC heater will operate to heat the passenger
compartment. At temperatures below 4
°
(40
°
F), both
stages of the PTC heater will operate.
412-02-3
412-02-3
Heating and Ventilation
•
DTC B1254 Air Temperature External Sensor
DIAGNOSIS AND TESTING
Circuit Failure
Heating/Defrosting/Ventilation System
— The interface adapter assembly (IAA) module
Diagnostic Trouble Code (DTC) Definition
uses the ambient temperature sensor to
The following DTCs relate to the
monitor the temperature of the outside air. If
heating/defrosting/ventilation system:
the ambient temperature sensor reads less than
-40
°
C (-40
°
F) or greater than 90
°
C (194
°
F)
•
DTC B1238 Over Temperature Fault
for 30 seconds, the IAA module sets DTC
— The positive temperature coefficient (PTC)
B1254 and assumes the temperature to be
switching module uses an overtemperature
215
°
C (419
°
F).
switch that is mounted on the heater plenum
•
DTC C1776 Heater System Failure
assembly to monitor the temperature of the
— The positive temperature coefficient (PTC)
PTC heater cores. The PTC overtemperature
heater core consists of two cores (A and B).
switch is a normally closed switch that opens
The PTC switching module drives core A,
when an overtemperature condition occurs.
core B or both core A and core B depending
The switch is set to open at 93
°
C-100
°
C
on ignition key cycling and temperature. The
(199
°
F-212
°
F). If the switch opens, the PTC
PTC switching module switches between core
switching module pulls the overtemperature
A and core B between ignition key cycling
fault line to the interface adapter assembly
and turns on both cores at low temperatures. If
(IAA) module low (0 volts), and the IAA
the core that is turned on by the PTC
module sets DTC B1238.
switching module is open or is in an
•
DTC B1249 Blend Door Failure
overcurrent condition, the PTC switching
— The interface adapter assembly (IAA) module
module must see a time of 45-60 seconds on
monitors the range of blend door position. The
the suspect heater core before a DTC code can
IAA module sets DTC B1249 if it detects the
be set. Afterwards, the PTC Switching Module
blend door is not moving for 30 seconds of
disables that core, switches to the other core,
applied voltage or senses the blend door
and pulls the interface adapter assembly (IAA)
feedback to be less than 0.15 volts or greater
module control line for the faulted core low (0
than 4.85 volts. The IAA module also sets
volts). The IAA module sets DTC C1776
DTC B1249 if the autocalibration routine of
when it detects either control line (core A or
the blend door operation sets the full warm
core B) low. It is possible to see an
position at less than three volts or the full cool
intermittent NO-HEAT condition on one core.
position at more than two volts.
•
DTC C1779 Blower Switch Failure
•
DTC B1250 Air Temperature Internal Sensor
— The interface adapter assembly (IAA) module
Circuit Failure
monitors the blower speed signals from the
— The interface adapter assembly (IAA) module
climate control blower switch. The IAA
uses the in-car temperature sensor to monitor
module sets DTC C1779 if it detects an
the temperature of the passenger compartment.
invalid combination of the blower speed inputs
If the in-car temperature sensor reads less than
for more than 30 seconds.
-40
°
C (-40
°
F) or greater than 90
°
C (194
°
F)
for 30 seconds, the IAA module sets DTC
B1250 and assumes the temperature to be
25
°
C (77
°
F).
412-02-4
412-02-4
Heating and Ventilation
DIAGNOSIS AND TESTING (Continued)
•
DTC C1780 Temperature Select Failure
•
DTC B2513 Blower (Fan) Circuit Failure
— The interface adapter assembly (IAA) module
— The interface adapter assembly (IAA) module
monitors the temperature control signal from
provides the pulse width modulation (PWM)
the climate control temperature control
control signal to the variable blower controller
potentiometer. The IAA module sets DTC
(VBC) and monitors the VBC feedback. The
C1780 if it detects the temperature command
VBC contains an internal transistor relay that
to be greater than 4.95 volts or less than 0.05
is used to drive the blower motor at high
volts for more than 30 seconds.
speed. The IAA module sets DTC B2513 if
the blower motor relay is closed, the VBC
•
DTC B1857 Climate Control On/Off Switch
internal relay is not closed or the VBC control
Failure
signal is greater than 1%, and the VBC
— The interface adapter assembly (IAA) module
feedback is less than 1 volt for more than 30
monitors the A/C present, system on, A/C on,
seconds. If DTC B2513 is set and the blower
and recirculation signals to determine if there
motor operates, the VBC has failed. If DTC
is a climate control on/off switch failure. The
B2513 is set and the blower motor does not
IAA module determines if the vehicle is
operate, but the coolant pump does, the blower
equipped with A/C by detecting an A/C
motor circuit has failed. If DTC B2513 is set
present signal from the A/C inverter motor
and the blower motor and coolant pump do
controller (IMC). The IAA module receives
not operate, the blower motor/coolant pump
the A/C on and system on signals from the
relay circuit has failed.
mode select switch and the recirculation signal
•
DTC B2514 Blower (Fan) Circuit Short to Vbat
from the fresh/recirculation select switch. The
IAA module sets DTC B1857 if it detects an
— The interface adapter assembly (IAA) module
invalid combination of the inputs for more
provides the pulse width modulation (PWM)
than 45 seconds.
control signal to the variable blower controller
(VBC) and monitors the VBC feedback. The
•
DTC U2015 Signal Link Fault (Non SCP)
IAA module sets DTC B2514 if the blower
— During the 5 seconds after receiving 12-volt
motor relay is open and the VBC feedback is
power from the interface adapter assembly
greater than the auxiliary battery voltage
(IAA) module, the positive temperature
minus 1 volt for more than 30 seconds.
coefficient (PTC) switching module carries out
•
DTC B2515 Heater Blower Relay Circuit Failure
a power on self test (POST) and outputs a 1.5
second-long pulse signal over the
— The interface adapter assembly (IAA) module
overtemperature fault line to the IAA module
provides the pulse width modulation (PWM)
to indicate it passed the POST. If the IAA
control signal to the variable blower controller
module does not receive this pulse, it will turn
(VBC) and monitors the VBC feedback. The
off the 12-volt power for 0.5 seconds and
VBC contains an internal transistor relay that
retry up to 3 times per ignition key cycle. If
is used to drive the blower motor at high
all three attempts at powering the PTC
speed. The IAA module sets DTC B2515 if
switching module fail, the IAA module
the VBC internal transistor relay is closed and
assumes the PTC switching module failed its
the VBC feedback is greater than 2 volts for
POST and sets DTC U2015. The IAA module
more than 30 seconds.
also sets DTC U2015 if the PTC switching
module detects an internal short and pulls the
short fault line to the IAA module low (0
volts).
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст