Ford Ranger EV. Electric Manual - part 42

LESSON 5: DIAGNOSIS

5-9

•

Before selecting any module test, select DATA LINK

DIAGNOSTICS and press the trigger. This will check the network

data bus to ensure that all the modules have good network

communication.

– If a module cannot communicate on the network it may be the

cause of the concern.

•

If network concerns exist, they must be corrected before any other

NGS diagnostics can be performed.

– Circuits 914 and 915 are the data bus circuits for the J1850

(SCP) network.

– Circuit 70 is the data bus circuit for the ISO 1941 network.

Ranger EV Program Card Module Menu

Once the Data Link Diagnostics are performed and any network

concerns are repaired (if present) the suspect module may be selected.

The menu for each module is the same.

•

Module Menu selections are:

– DIAGNOSTIC TEST MODES

– PID/DATA MONITOR AND RECORD

– ACTIVE COMMAND MODES

– MODULE IDENTIFICATION

– DIAGNOSTIC TROUBLE CODE LIBRARY

•

The Module Menu selections and functions are similar to other

Ford vehicles and should be familiar to technicians.

NOTE: Use of parameter identification data (PID) is critical when

diagnosing a Ranger EV. Technicians who are unfamiliar with the

operation and utilization of the PID menu should refer to the New

Generation STAR Tester Reference Guide.

LESSON 5: DIAGNOSIS

5-10

Parameter Identification Data (PID) Monitor and
Record

This menu will allow you to monitor and record the operation of

many of the vehicle’s components.

•

Since there are so many PIDs available, there is also a definition

(DEFN) function that will tell you the meaning of the acronym

used to identify the component/function.

•

Use of PIDs is critical when diagnosing the Ranger EV. If you are

unfamiliar with the operation and utilization of the PID menu, refer

to the New Generation STAR Tester Reference Guide.

•

The PID Indices in Section 100-07 of the workshop manual

supplement will provide you with PID descriptions and expected

values.

Active Command Mode

The Active Command Modes menu of the NGS will enable you to

activate certain components of a vehicle system using the NGS to test

the function. This can save time by determining if the source of the

problem is in the component, or in the signaling system that activates it.

•

For example, the Central Timing Unit Active Command Menu

allows you to command on the windshield wiper.

•

If the NGS can activate the wiper, the problem is likely in the wiper

switch or circuits. If not, the wiper motor may need repair.

•

As with PIDs, each module will have its own list of components

that can be commanded in this menu.

There is an active command function for the Ranger EV standard

corporate protocol (SCP) networked modules (IAA, BCM, and TIM)

called “packeted” commands.

•

This function allows the SCP modules to send more than one active

command at the same time.

•

This allows the NGS to enable multiple high voltage components

simultaneously (A/C, IMC, power steering controller assembly,

PTC, contactor box relays, etc.)

•

In some cases it is required to use a packeted command series in

order to activate a component.

– For example, in order to activate the main contactor using the

active command, you must first close the precharge contactor, or

the NGS will not be able to perform the operation.

LESSON 5: DIAGNOSIS

5-11

CONTACTOR BOX DIAGNOSIS

Contactor Box

•

Diagnostic trouble code (DTC) C1862 is associated with the

Contactor Box and its circuits.

•

The Contactor Box Assembly (CBA) is basically an on/off switch

for the traction battery.

•

The CBA contains the high voltage contactor relays, fuses, and

resistors.

– The components of the CBA are controlled by the BCM, TIM,

IAA, ignition switch, and Emergency Power Off (EPO) function.

•

The only replaceable components inside the CBA are the fuses.

– If any other component failure occurs the entire unit must

be replaced.

•

A critical concern in the CBA is the occurrence of an

uncommanded contactor relay closure, resulting in high voltage

power from the traction battery present outside of the traction

battery assembly with the driver key in the OFF position.

– This condition creates a hazardous situation and must be

corrected before further diagnosis or repair is attempted.

•

For complete diagnosis of the Contactor Box and circuits, refer to

Workshop Manual Supplement, Section 414-03.

ER096-A

LESSON 5: DIAGNOSIS

5-12

NOTES