Ford 2001 Ranger, Manual

Page: 810 / 1218

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