Silvercrest SKAS 1000 A16 Especificaciones descargar pdf (Pagina 69)

Section 3

Maintenance

SAE J1939 Requirements Flowchart

Notice

The ZF-FreedomLine transmission actively diagnoses SAE J1939 data bus faults and reacts accordingly when

the data bus or devices on the data bus, such as engine ECM, VECU (Vehicle Electronic Control Unit), and

ABS, that FreedomLine depends on, are not operating properly. The ZF-FreedomLine transmission

recognizes two types of SAE J1939 data bus faults, message faults and hardware faults. Message faults are

triggered when an SAE J1939 message is either missing or contains information that is out of limits.

Hardware faults are triggered when the SAE J1939 data bus fails. Hardware faults include shorted wires,

open wires, and improper assembly.

4004243a

The issue

lies within

the ABS

system.

Is the ABS

light on?

Ye s

Check the

engine codes.

This flowchart continues

on the next page.

Troubleshoot the

ABS paying close

attention to the

wheel-end speed

sensors.

Follow the ABS

supplier's

troubleshooting.

Is the

check engine

light on?

Ye s

The engine has

not received the

necessary

messages from

the transmission

via the SAE

J1939 data bus.

Is the

fault a

VSS fault?

Ye s

Troubleshoot the

engine. Follow the

engine OEM

troubleshooting.

The issue lies within

the OEM-installed

SAE J1939 data bus.

Consult the OEM

for proper repair

procedures.

Using TransSoft,

plug into the truck

and obtain the active

and inactive ISO

fault codes.

Check for the

following

active codes.

• ISO 178

• ISO 179

• ISO 163

• ISO 177

Are any

of them logged

and active?

The issue lies within the

OEM-installed SAE J1939

data bus. Consult the

OEM for proper repair

procedures.

Ye s

Check for the

following

active codes.

Are any

of them logged

and active?

The issue lies

with the

ABS controller.

None of the

messages sent

from the ABS

controller have

been received

by the

transmission

TCU.

The ABS may

not have power

or the

SAE J1939

data bus may be

disconnected.

Contact the

OEM or

ABS supplier

as necessary.

Check for the

following

active codes.

Are any

of them logged

and active?

Ye s

The issue lies

within the

engine ECM.

None of the

messages from

the engine ECM

have been

received by the

transmission

TCU.

The engine ECM

may not have

power or the

SAE J1939 data

bus may be

disconnected.

Contact the

OEM or

engine supplier

as necessary.

Ye s

• ISO 199

• ISO 91

• ISO 26

• ISO 180

• ISO 181

• ISO 182

• ISO 183

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