Bendix Commercial Vehicle Systems VORAD EVT-300 TROUBLESHOOTING - Manual (Page 87)

Fault Isolation Procedures
Code 31
(SID 250, FMI 2)
2-76
Code 31 (SID 250, FMI 2) J-1587 Data Link Error
Step A Procedure Condition Action
1. Key off.
2. Disconnect the Central
Processing Unit 32-way
connector.
3. Disconnect engine ECU connector
which contains the J-1587 data
link.
4. Measure resistance between:
• Central Processing
Unit 32-way
connector pin C7
and engine ECU pin
# (see engine OEM
for pin location).
• Central Processing
Unit 32-way pin C7
and ground.
If resistance between pin C7
and engine ECU pin is 0 to .3
ohms and if resistance
between pin C7 and ground
is more than 10K ohms or
open circuit [OL]
If resistance is outside of
range
Go to Step B.
Repair J-1587 data link wiring
harness between engine ECU
and Central Processing Unit.
Go to Step V.
V A COM
1
C D
2
3
4
5
6
7
8
9
10
11
12
13
14
16
15
SEE ENGINE OEM
FOR PIN LOCATION
V A COM
1
C D
2
3
4
5
6
7
8
9
10
11
12
13
14
16
15
GROUND