Fault Isolation Procedures

Fault

Hand-Held Codes

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Codes

SID

FMI

Description

Type of Code

Driving Technique

 

 

 

 

 

 

 

 

 

21

7

2

Right Turn Signal

System

Key on. If the fault is present, the

 

 

 

 

 

system should automatically detect the

 

 

 

 

 

problem and set the code. If the fault

 

 

 

 

 

is not present at key on, operate the

 

 

 

 

 

vehicle and attempt to duplicate the

 

 

 

 

 

driving conditions that triggered the

 

 

 

 

 

fault code. Possible triggers include

 

 

 

 

 

heat and vibration.

 

 

 

 

 

 

 

 

22

8

2

Left Turn Signal

System

Key on. If the fault is present, the

 

 

 

 

 

system should automatically detect the

 

 

 

 

 

problem and set the code. If the fault

 

 

 

 

 

is not present at key on, operate the

 

 

 

 

 

vehicle and attempt to duplicate the

 

 

 

 

 

driving conditions that triggered the

 

 

 

 

 

fault code. Possible triggers include

 

 

 

 

 

heat and vibration.

 

 

 

 

 

 

 

 

 

 

 

 

23

3

2

Brake Input Signal

System

Key

on. Apply

service

brake

for

 

 

 

 

 

a minimum

of

8 seconds. If

the

 

 

 

 

 

fault is present, the system should

 

 

 

 

 

automatically detect the problem and

 

 

 

 

 

set the code. If the fault is not present at

 

 

 

 

 

key on, operate the vehicle and attempt

 

 

 

 

 

to

duplicate

the

driving

conditions

 

 

 

 

 

that triggered the fault code. Possible

 

 

 

 

 

triggers include heat and vibration.

 

 

 

 

 

 

 

24

6

2

Speed Input Signal

System

Select a forward gear and drive at a

 

 

 

 

 

steady speed no slower than 10 MPH.

 

 

 

 

 

It may be necessary to operate the

 

 

 

 

 

vehicle for a prolonged period of time

 

 

 

 

 

if the cause of failure is related to heat

 

 

 

 

 

and vibration.

 

 

 

 

 

 

 

 

 

 

25, 32

231

2,12,14

J-1939 Data Link Signal

System

Key on. If the fault is present, the

 

 

 

 

 

system should automatically detect the

 

 

 

 

 

problem and set the code. If the fault

 

 

 

 

 

is not present at key on, operate the

 

 

 

 

 

vehicle and attempt to duplicate the

 

 

 

 

 

driving conditions that triggered the

 

 

 

 

 

fault code. Possible triggers include

 

 

 

 

 

heat, vibration, and varying levels of

 

 

 

 

 

throttle demand. It may take up to 75

 

 

 

 

 

seconds to set this fault.

 

 

1-5

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BENDIX BW2849 manual Description Type of Code, Right Turn Signal System Key on. If the fault is present, Driving, 231 12,14
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