High Voltage Wiring Check
- Park the vehicle on a level surface, shut down the vehicle, and apply the parking brake. Chock the tires.
- Decommission the vehicle. See the eM2™ Workshop Manual for procedures.
- Inspect the condition of the high voltage connectors. Check for signs of excess dirt and debris build up on or around the connectors. Clean exterior debris from the connectors using a dry method such as a vacuum cleaner.
- Inspect the condition of the high voltage connectors. Check for signs of excess dirt/debris build up on or around the connectors. Clean exterior debris from the connectors using a dry method such as a vacuum cleaner.
- Inspect high voltage harnesses for secured routing that
prevents excess harness movement and prevents the harness from pulling
too tight on the connector. Inspect harnesses for signs of rubbing
or chafing that could result in wire circuit damage. Damaged wiring
and/or damage to harness protective wrap must be replaced. All high
voltage cables have specific routing that cannot be changed. When
performing the harness routing check, make sure the bend diameter
of the high voltage cables is within tolerance (if routed correctly,
this should not be a problem). See Fig., Fig. and Fig..
Check for the following:
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broken clamps or ties and worn or damaged cables where fasteners touch the cables;
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fix cable routing, as required, by removing fasteners.
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Frontbox
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Charging Fuse
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High Voltage Batteries
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eAxles
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DC Box
Fig. 1, HV Cable Routing for Class 6 Vehicles
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Frontbox
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Charging Fuse
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High Voltage Batteries
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eAxles
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DC Box
Fig. 2, HV Cable Routing for Class 7 Vehicles
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DC/DC Converter
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Air Compressor
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Auxiliary PDU
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Positive Temperature Coefficient Heating Element
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eRC
Fig. 3, HV Frontbox Cable Routing
Important: Do not over bend cables. Doing so may cause damage to the cables which may result in a loss of power to the vehicle.
Note: Removing fasteners requires that the vehicle be decommissioned.
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Danger: Electric vehicles are equipped with a high-voltage system. Do not attempt any type of electrical work on the vehicle unless you have completed HV3 Daimler Safety Training. Failure to do so could cause severe personal injury or death.