BENDIX BW2849 manual Step D, Key off Depress brake pedal

Fault Isolation Procedures

Code 23 (SID 3, FMI 2) Brake Input Error, continued

Step D Procedure Condition Action

1.	Key off.
2.	Depress brake pedal.
3.	Measure voltage between	If voltage is within 1 volt of
	Central Processing Unit	battery voltage
	pins C9 and C2.

If voltage is outside of range

D C

1

2

3

4

5

6

7 8

9

10

11

12

13

14

15 16

Replace Central Processing

Unit. Go to Step V.

Repair OEM wiring harness as necessary. Go to Step V.

	VOLT	(SID 3,FMI	Code23
		2)
V	COM	A

Step E Procedure Condition Action

1.Key off.

2.Reconnect Central Processing Unit 32-way connector.

3.Connect a PC-based or Hand-held Diagnostic Tool.

4.Key on.

5.Perform brake test to

verify correct signal is received when brake pedal is depressed.

If correct signal is received

If correct signal is not received

Replace Central Processing Unit. Go to Step V.

Repair OEM wiring harness. J-1587 or J-1939 data link may not be connected to the Bendix™ VORAD® system. Go to Step V.

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