Ford Electric Ranger 2001 Manual page 810

418-00-2
DESCRIPTION AND OPERATION
Module Communication
The Electric Ranger has two module
communications networks. The standard corporate
protocol (SCP) communications network, which is
an unshielded twisted pair cable (data bus plus,
circuit 914 and data bus minus, circuit 915 ) and
the international standards organization (ISO) 9141
communications network, which is a single wire
network (circuit 70 [/W]). Both networks can be
connected to NGS Tester at one connector called
the data link connector (DLC). This makes
troubleshooting these systems easier by allowing
one smart tester to be able to diagnose and control
any module on the two networks. The DLC can be
found under the instrument panel between the
steering column and the radio.
The ISO 9141 communication network does not
permit inter-module communication. When the NGS
tester communicates to modules on the ISO 9141
communication network, the NGS tester must ask
for all information; the modules cannot initiate
communications.
The SCP communications network allows
inter-module communication and will remain
operational even with the severing of one of the bus
wires. Communication will also continue if one of
the bus wires is shorted to ground or battery
positive voltage (B+) or if a termination resistor is
lost. This faulted condition is detected and reported
to the host by the module's network bus interface
circuits.
Unlike the SCP communications network, the ISO
9141 communications network will not function if
the wire is shorted to ground or battery positive
voltage (B+). Also, if one of the modules on the
ISO 9141 communications network loses power or
shorts internally, communications to that module or
all modules, will fail.
Standard Corporate Protocol (SCP)
Communication Network
The battery control module (BCM), interface
adapter assembly (IAA) module, and traction
inverter module (TIM) operate using the SCP
communications network.
Module Communications Network
The BCM is located in the upper front section of
the traction battery and controls all of the traction
battery systems. The module controls traction
battery charging and cooling, and operates the
traction battery self- heating system for cold climate
operation. Maximum current flow out and into the
traction battery is also controlled by the BCM. In
addition to controlling the traction battery systems,
the BCM monitors the traction battery state of
charge and sends the information to the IAA which
sends a signal to the instrument cluster State of
Charge gauge. Refer to
Section
The IAA module location is the standard Ranger
powertrain control module location, which is in the
passenger side bulkhead in the engine compartment.
The IAA module controls the climate control
system, power steering, direct current to direct
current (DC/DC) converter, vacuum pump, coolant
pump, and radiator coolant fan operation. The
module also operates a number of instrument cluster
gauges and warning lamps. Refer to
412-04.
The TIM is located in the rear of the vehicle,
behind the motor/transaxle and below the pickup
box. The TIM converts high voltage direct current
(DC) from the traction battery into high voltage
alternating current (AC) to power the
motor/transaxle. Output from the TIM to the
motor/transaxle is varied to control the torque
applied to the driven wheels based upon sensor
inputs and driver demands. Refer to
303-14.
International Standards Organization (ISO)
9141 Communications Network
The anti-lock brake control module, central timer
module (CTM), and the electronic crash sensor
(ECS) module operate using the ISO 9141
communications network.
The anti-lock brake control module is mounted on
the hydraulic control unit, which is located in the
underhood compartment on the driver side near the
inner fender. The module modulates brake line
pressure to prevent wheel lock-up under heavy
braking. Refer to
Section 414-03A
414-03B.
Section 206-09.
2001 Ranger EV, 01/2001
418-00-2
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