BENDIX BW2849 manual Code 31 SID 250, FMI 2 J-1587 Data Link Error, Step a

Fault Isolation Procedures

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.

DC

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15 16

DC

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15 16

V COM A

V COM A

GROUND

SEE ENGINE OEM FOR PIN LOCATION

(SID 250,	Code
FMI	31
2)

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