Selftest Answers

For the preceding self-test on The Charging System, the following best complete the sentence or answer the question. In cases where you may disagree with the choice - or may simply want to reinforce your understanding - please review the appropriate workbook page or pages noted.

1 . "C" - The regulator controls alternator output by increasing or decreasing the amount of current from the battery to the rotor field coil. (Page 5.)

2. "C" - The alternating current is changed into direct current by the rectifier, a set of diodes which allow current to pass in only one direction. (Page 2.)

3. "B" - If either the regulator sensor (terminal "S") or the alternator output (terminal "B") become disconnected, the warning lamp goes on. (Page 4.)

4. "A" - If the warning lamp does not light, with the ignition ON and the engine not running, the possible causes include a blown fuse, burned out lamp, loose connections, or faulty relay or regulator. (Page 9.)

5. "D" - Terminal "F is the only terminal that can be grounded. Never ground alternator output terminal "B. It has battery voltage present at all times, even with the engine off. (Page 9.)

6. "C" - A "new belt" is one that has been used for less than 5 minutes. It is installed with more tension than a used belt, because it will stretch some during use. Methods of checking are different for different models. (Page 10.)

7. "B" -The reading should be about six amps. This is the amount of current the alternator must supply for ignition and accessories. (Page 12.)

8. "C" - With the alternator operating at maximum output, the reading should be within 10% of rated output. (Page 12.)

9. "ID" - To check for the insulated circuit voltage drop, connect the voltmeter leads to the battery's (+) terminal and the alternator output (B) terminal. (Page 14.)

10. "C" - Excessive resistance is most likely caused by loose or corroded connections. (Page 14.)

Taken with permission from the Toyota Basic Electrical Course#622,

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