Page 181 - CTS - Mechanic Diesel - TP

MECHANIC DIESEL - CITS

2 Locate the feedback circuit from the voltage regulator’s (2) ‘F’ terminal (4) to the alternator’s (1) field terminal
(6) and check the continuity.

3 Locate the circuit from the voltage regulator’s (2) ‘B’ terminal (7) to the ammeter (8) and check the continuity.
4 Locate the circuit from the ammeter (8) to the battery (9) and check the continuity.
5 Locate the circuit from the voltage regulator’s (2)’A’ terminal (3) to the indicator lamp (12) and check the
continuity.
6 Locate the circuit from the indicator lamp (12) to the ignition switch (11) and check the continuity.
7 Locate the ground connection (13) and check the continuity.
8 Locate the circuit from the ammeter (8) to the ignition switch (11) and check the continuity.

TASK 2: Remove alternator
1 Disconnect the earth cable of the battery.
2 Disconnect the wires from the alternator.

3 Loosen the bolts which secure the alternator with the bracket.
4 Take out the alternator

TASK 3: Alternator Output Test
1 The alternator output test checks the ability of the alternator to deliver its rated output of voltage and current
2 This test should be performed whenever an overcharging or undercharging problem is suspected.
3 Output current and voltage should meet the specifications of the alternator. If not, the alternator or regulator
(IC or external) may require replacement.
4 An Alternator tester, similar testers, or a separate voltmeter and ammeter can be used.
5 Vehicle repair manuals detail the testing procedures with an ammeter and voltmeter.

6 Follow the manufacturer’s instructions when using special testers, although most are operated similarly. The
following steps outline a typical procedure for performing the
Alternator output test using an alternator tester:
Charging Without Load

1 Prepare the tester

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CITS : Automotive - Mechanic Diesel - Exercise 10.1