Mechanic's Items

1. Daily Tips
2. Maintenance
3. 12V Battery Jump 

Daily Tips

Personal protective equipment (PPE)

In addition to the PPE that is normally worn in a shop environment, PPE that protects the wearer against high-voltage contact or arc flash must also be worn when appropriate

Safety

Remove the Danger

The Specialist for High Voltage Systems (SH) will remove power from a high voltage vehicle before it is worked-on. There are five steps to this procedure:

• Disconnect the source of high voltage to the vehicle. This generally consists of ensuring that the battery contactors are open
• Secure the electrical system against reconnection to high voltage. Follow lock-out/ tag-out procedures to prevent the vehicle from being inadvertently re-started
• Verify that the high-voltage system is shut off. Before performing any work involving the high-voltage system, it must be verified voltage free by use of a dual- pole voltage tester
• Grounding and short-circuiting - this step must be carried out only if the system's nominal rated voltage exceeds 1000 VAC or 1500 VCD. It can be skipped if the first three steps are carried out successfully
• Provide protection from adjacent live parts - this step will likely not be necessary as when the vehicle is shut off, there will be no adjacent live parts. However, you must still protect workers from other hazards that might be present, such as rotating equipment, hot surfaces, etc

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Maintenance

Do not exceed mileage or time intervals for the following recommended maintenance schedule

Every 7,500 Miles

• Rotate tires, inspect tire wear, measure depth and check tire pressure for proper inflation  
• Check fluids and fill if needed
  
  

Every 15,000 Miles

• Inspect brake pads, rotors, hoses and parking brake
• Inspect the steering linkage, ball joints, suspension, tie-rod ends, driveshaft and the U-joints
  
  

Every 30,000 Miles

• Replace cabin air filter
• Replace windshield wipers
• Perform a multi-point inspection
• Reset service indicator and apply reminder label

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12V Battery Jump 

If the Low Voltage Battery Disconnect switch is ON and the Ignition Key switch is turned ON and the dash does not respond or only states “LOW VOLTAGE” in the message center, you will need to perform a Low Voltage Jump Start.

• Turn the ignition key switch to the OFF position
• Open the Low Voltage (12 volt) battery access door. Turn the Low Voltage Disconnect Switch to the OFF position
• Pull up on the spring latch handles and slide the battery tray out to access the battery terminals
• Using a 6 amp minimum Jump Box or battery charger, carefully connect the cable clamps to the proper terminals (positive to positive and negative to negative). Do not allow the clamps to touch each other or the other terminals
• Wait five minutes to allow the bus batteries to build an initial charge
• Leave the cables connected and turn the Low Voltage Disconnect Switch to the ON position
• Turn the Ignition Switch to the ON position

• Check to ensure that the parking brake is engaged. Pull out the yellow parking switch to engage, if needed
• Turn the Ignition Switch to the Start / Crank position and release. The Power ON process may take up to 1 minute. The Vehicle HV Enabled indicator will illuminate
• Allow the Low Voltage status to clear then disconnect the charging cables. Return the battery tray to its stowed position and close the access door

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