Ford Ranger EV. Electric Manual - part 11

LESSON 1: VEHICLE OVERVIEW

1-41

•

The compressor is located in the lower center of the underhood

compartment and:

– is a 33 cc scroll design.

– has an integral 3.5 kW (4.7 hp) motor.

– has a maximum shaft speed of 7812 rpm.

•

The A/C system is a modified Ranger clutch cycling orifice tube

(CCOT) system that:

– requires .8 kg (1.75 lb) of R134a

– uses a carryover gasoline-powered Ranger condenser unit.

– has refrigerant lines and evaporator/blower assemblies that are

new for Electric Ranger.

•

The lower limit of the cooling temperature in the passenger

compartment is 18°C (65°F) to conserve traction battery power.

LESSON 1: VEHICLE OVERVIEW

1-42

NETWORKS AND MULTIPLEXING

Multiplexing System

•

A network is an electronic system composed of control module(s)

and/or diagnostic tester (scan tool) that are connected with at least

one wire. This hardware allows the modules to communicate with

each other.

•

The use of networks provides several benefits. These include:

– Input sensor information can be shared between control

modules. This means that they do not have to be hard wired into

each module that requires the data they provide.

– Complex vehicle actions requiring the participation of more than

one module can be performed.

– Improved diagnostic capability is available over the network.

LESSON 1: VEHICLE OVERVIEW

1-43

•

Multiplexing is an operating strategy where control modules can

communicate with each other during normal vehicle operation.

•

Multiplexing only occurs over the J1850 network.

•

Modules that are multiplexed use the J1850 network and standard

corporate protocol (SCP) to communicate (a protocol is a type of

computer language).

•

The International Standard Organization (ISO) 9141 network is

NOT a multiplexed network.

•

The ISO 9141 network is only used for diagnostic purposes and is

not active during normal vehicle operation.

•

In order for the ISO 9141 network to be active, a scan tool must be

connected to the network.

•

The Electric Ranger  has both a J1850 (SCP) and an ISO 9141

network.

•

The J1850 (SCP) network consists of:

– a twisted pair of connecting wires (known as a data bus) in the

wiring harness (Circuits 914 and 915).

– traction inverter module (TIM).

– battery control module (BCM).

– interface adapter assembly (IAA).

– data link connector (DLC) (located next to the steering column).

•

The ISO 9141 network consists of:

– a single wire data bus (circuit 70).

– anti-lock brake system (ABS) module.

– central timer module (CTM).

– electronic crash sensor (ECS) module.

– DLC.

•

Diagnostics for both networks is accessed through the DLC using

New Generation STAR (NGS) Tester (covered in Lesson 5).

LESSON 1: VEHICLE OVERVIEW

1-44

HIGH VOLTAGE INTERLOCKS

High Voltage Interlocks

•

High voltage interlocks help prevent electrical accidents by

disabling high voltage power when:

– connectors are disconnected.

– the top cover (A) of the high voltage power distribution box (B)

is removed.

•

The Electric Ranger has interlocks on the following components

and wiring:

– The high voltage power distribution box cover.

– The high voltage connector from the traction battery to the high

voltage power distribution box.

– The high voltage connector from the traction battery to the TIM.

ER030-A

A

B