BENDIX BW2849 Power-Up Sequence Test, Central Processing Unit Driver Display Unit Vehicle Harness

Fault Isolation Procedures

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).

Required Tools

•Digital Volt/Ohm Meter

Possible Causes

•Central Processing Unit

•Driver Display Unit

•Vehicle Harness

Fallback

If self-check fails, the product can not perform any operations.

Harness		Central
	Driver	Processing Unit
	Display Unit
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