Diagnosis and Troubleshooting of Automotive Electrical, Electronic, and Computer Systems, Fifth Edition By James D. Halderman © 2010 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ FIGURE 40-1 Rubber linesman’s gloves protect the wearer from a shock hazard.

Diagnosis and Troubleshooting of Automotive Electrical, Electronic, and Computer Systems, Fifth Edition By James D. Halderman © 2010 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ FIGURE 40-2 Wearing leather gloves over the linesman’s gloves helps protect the rubber gloves from damage.

Diagnosis and Troubleshooting of Automotive Electrical, Electronic, and Computer Systems, Fifth Edition By James D. Halderman © 2010 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ FIGURE 40-3 Checking rubber linesman’s gloves for pinhole leaks.

Diagnosis and Troubleshooting of Automotive Electrical, Electronic, and Computer Systems, Fifth Edition By James D. Halderman © 2010 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ FIGURE 40-4 Be sure to only use a CAT III–meter when taking electrical voltage measurements on a hybrid vehicle.

Diagnosis and Troubleshooting of Automotive Electrical, Electronic, and Computer Systems, Fifth Edition By James D. Halderman © 2010 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ FIGURE 40-5 The meter leads should also be CAT III rated when checking voltages on a hybrid electric vehicle.

Diagnosis and Troubleshooting of Automotive Electrical, Electronic, and Computer Systems, Fifth Edition By James D. Halderman © 2010 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ FIGURE 40-6 This Honda Accord hybrid is identified by the emblem on the rear deck lid.

Diagnosis and Troubleshooting of Automotive Electrical, Electronic, and Computer Systems, Fifth Edition By James D. Halderman © 2010 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ FIGURE 40-7 A hybrid electric vehicle can often be identified by looking for orange-colored cables under the hood, as well as other markings on the engine cover.

Diagnosis and Troubleshooting of Automotive Electrical, Electronic, and Computer Systems, Fifth Edition By James D. Halderman © 2010 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ FIGURE 40-8 A Toyota Highlander hybrid battery pack with the cover removed.

Diagnosis and Troubleshooting of Automotive Electrical, Electronic, and Computer Systems, Fifth Edition By James D. Halderman © 2010 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ FIGURE 40-9 The high-voltage disconnect (service) plug is located on the left side of the rear seat in a Toyota Highlander hybrid vehicle.

Diagnosis and Troubleshooting of Automotive Electrical, Electronic, and Computer Systems, Fifth Edition By James D. Halderman © 2010 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ FIGURE The Ford Escape Hybrid instrument panel showing the vehicle in Park and the tachometer on “EV” instead of 0 rpm. This means that the gasoline engine could start at any time depending on the state of charge of the high-voltage batteries and other factors.

Diagnosis and Troubleshooting of Automotive Electrical, Electronic, and Computer Systems, Fifth Edition By James D. Halderman © 2010 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ FIGURE Jumpstarting a2001–2003ToyotaPrius using a12-volt supply to boost the 12-volt auxiliary battery in the trunk. (Courtesy of Toyota)

Diagnosis and Troubleshooting of Automotive Electrical, Electronic, and Computer Systems, Fifth Edition By James D. Halderman © 2010 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ FIGURE The underhood 12-volt jump start terminal on this Toyota Prius has a red plastic cover with a “+” sign. The positive booster cable clamp will attach directly to the vertical metal bracket.

Diagnosis and Troubleshooting of Automotive Electrical, Electronic, and Computer Systems, Fifth Edition By James D. Halderman © 2010 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ FIGURE Use of a warning cover over the steering wheel helps others realize that work is being performed on the high- voltage system and that no one is to attempt to start or move the vehicle.

Diagnosis and Troubleshooting of Automotive Electrical, Electronic, and Computer Systems, Fifth Edition By James D. Halderman © 2010 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ FIGURE A lock box is a safe location to keep the ignition keys of a hybrid electric vehicle while it is being serviced. Notice that this lock box has two separate locks so it would require two people to open, helping to insure that no harm is done by accidentally attempting to start a HEV.

Diagnosis and Troubleshooting of Automotive Electrical, Electronic, and Computer Systems, Fifth Edition By James D. Halderman © 2010 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ FIGURE Insulated tools, such as this socket set, would provide an additional margin of safety to the service technician when working around high-voltage components and systems.

Diagnosis and Troubleshooting of Automotive Electrical, Electronic, and Computer Systems, Fifth Edition By James D. Halderman © 2010 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ FIGURE The high-voltage wiring on this Honda hybrid is colored orange for easy identification.