Bendix Commercial Vehicle Systems VORAD EVT-300 TROUBLESHOOTING - Manual (Page 16)

Fault Isolation Procedures
2-5
Power-Up Sequence Test
Overview
A failure during the power-up self-check indicates a failure of the
Central Processing Unit.
Detection
The power-up self-check is performed automatically each time the
key is turned on. Turn the key on and watch the Driver Display Unit.
If lights on the Driver Display Unit remain on after 15 seconds, or
never come on, the self-check has failed. NOTE: Not applicable for
Freightliner IDI (Integrated Dash Interface).
Fallback
If self-check fails, the product can not perform any operations.
Required Tools
• Digital Volt/Ohm Meter
Possible Causes
• Central Processing Unit
• Driver Display Unit
• Vehicle Harness
Harness
Driver
Display Unit
Central
Processing Unit