Power-up sequence test, continued, Fault isolation procedures, Step e procedure condition action – Bendix Commercial Vehicle Systems VORAD EVT-300 TROUBLESHOOTING User Manual
Page 20
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Fault Isolation Procedures
2-9
Power-Up Sequence Test, continued
Step E
Procedure
Condition
Action
1. Key off.
2. Disconnect Central Processing
Unit 32-way connector.
3. Measure resistance between:
• Central Processing
Unit 32-way
connector pin D5
and Driver Display
4-way connector
pin B.
• Central Processing
Unit 32-way
connector pin D5
and ground.
If resistance between pin D5
and pin B is 0 to .3 ohms and if
resistance between pin D5
and ground is more than 10K
ohms or open circuit [OL]
If any of the above conditions
are not met
Go to Step F.
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
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