Chapter 33 Hybrid Drive Systems Diagnosis and Repair 655
Copyright by Goodheart-Willcox Co., Inc.
Figure 33-16. Factory diagrams like this one will help you fi nd loose electrical connectors and other problems in a hybrid drive system.
C 8 Center Speaker
C 9 Clock
C 10 Combination Meter
C 11 Combination SW
C 12 Combination SW
C 13 Combination SW
C 14 Combination SW
D 1 Data Link Connector 3
D 2 Daytime Running Light Relay
D 3 Diode (Daytime Running Light)
D 18 Diode (Rear Wiper)
D 4 Engine Control Module
D 5 Engine Control Module
D 6 Engine Control Module
D 7 Engine Control Module
E 4 Engine Control Module
E 5 Engine Control Module
E 6 Engine Control Module
E 7 Engine Control Module
F 11 Front Passenger Seat Belt
Warning Light
G 1 Gateway ECU
G 2 Glove Box Light
H 11 Hazard SW
ODO/TRIP SW
H 12 Headlight Beam Level Control ECU
H 13 Heated Oxygen Sensor (Bank 1 Sensor 2)
H 14 Hybrid Vehicle Control ECU
H 15 Hybrid Vehicle Control ECU
H 16 Hybrid Vehicle Control ECU
H 17 Hybrid Vehicle Control ECU
2. What will happen in a hybrid vehicle if current fl ow
becomes too high due to a short?
3. List nine safety rules you should follow when working
on high-voltage, high-current hybrid drive systems.
4. To prevent electric shock, wait at least _____ minutes after
removing the high-voltage disconnect before working on
the high-voltage capacitors in the inverter circuit.
5. Summarize how to check HV battery pack performance.
6. When test-driving the hybrid in the electric mode,
why is it best to drive up a small hill?
7. What common problems can occur with relays and
contactors?
8. Describe how to make a pinpoint test on a
high-voltage contactor.
9. What common problems can occur with hybrid
vehicle power cables?
10. What should you do if your scan tool shows that
resistance values for a power cable are not within
specifi cation?
11. Describe how to replace a high-voltage power cable.
12. What can commonly cause a circuit board in the
power control module to fail?
13. What components in a cooling system typically fail?
14. Under what conditions can a motor-generator fail?
15. What common problems can occur with a
motor-generator?