Bendix Commercial Vehicle Systems VORAD EVT-300 TROUBLESHOOTING - Manual (Page 96)

Fault Isolation Procedures
2-85
Code 33 (SID 248, FMI 12) VBUS Error, continued
Step D Procedure Condition Action
1. Key off.
2. Measure resistance between:
• Central Processing
Unit 32-way
connector pin D6
and Driver Display
4-way connector
pin A.
• Central Processing
Unit pin D6 and
ground.
If resistance between pin D6
and pin A is 0 to .3 ohms and
if resistance between pin D6
and ground is more than 10K
ohms or open circuit [OL]
If any of the above conditions
are not met
See “Code 13, 34 (SID 9, FMI
2, 4, 5, 12) Driver Display
Unit” on page 22 and “Code
14, 35 (SID 1, 2, FMI 2, 12,
14) Antenna” on page 30 to
diagnose if Antenna or Driver
Display Unit is defective.
Repair OEM wiring harness
between Driver Display Unit
and Central Processing Unit.
Go to Step V.
OHMS
V A COM
OHMS
GROUND
V A COM
1
C D
2
3
4
5
6
7
8
9
10
11
12
13
14
16
15
1
C D
2
3
4
5
6
7
8
9
10
11
12
13
14
16
15
D C B A