Copyright by Goodheart-Willcox Co., Inc.
battery pack state of
charge (SOC)
high-voltage buffer
zone
high-voltage
disconnect
hybrid ground fault
interrupter
Technical Terms
643
Hybrid Drive
Systems Diagnosis
and Repair
Chapter
33
After studying this chapter, you will be able to:
Summarize the most common problems that occur in a hybrid drive system.
Use on-board diagnostics to fi nd the source of problems in a hybrid drive system.
Recall the safety measures that must be followed when working on high-voltage, high-current
hybrid drive systems.
Carry out basic tests to verify hybrid drive trouble codes.
Carry out proper procedures for safely removing and replacing an HV battery pack, a power control
module, electric drive cables, ECUs, and motor-generator assembly.
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