Chery B11. Manual — part 79

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Additionally, when exciting current is stable, alternator output voltage increase with engine

speed increasing.

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Alternator Specification

Item Specification

Type

Battery voltage measurement

Rated Output Power V/A

12/90

Voltage Regulator

Embedded electronic adjustment

Check Specification

Item Standard

Value

Limit value

Alternator output circuit voltage drop（at 30A） Max.

Value

0.3

－20℃ 14.2－15.4

20℃ 13.9－14.9

60℃ 13.4－14.6

Voltage regulation range

Voltage regulator usage

temperature

80℃ 13.1－14.5

Output

current

70% rated output

current

Special Tool

Tool Number

Name

Purpose

MB991519

Alternator

wiring

connector

Check S terminal

voltage of

alternator

II. Voltage measurement experiment for alternator output circuit

Check adjustment and experiment sequence

The experiment is designed to check if the wiring between alternator B terminal and battery

anode (including fuse) is OK.

1. Please check the following items before testing.

a)

Alternator installation status

b)

Alternator transmission belt tension

c) Fuse

status

d)

If abnormal noise exists during alternator running

2. Turn ignition switch to OFF.

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3. Remove cathode cable of F battery

4. Disassemble alternator output cable from terminal B. Place a 0-100A DC ammeter for test in

series between terminal B and removed output cable.

(Connect anode cable of ammeter to B and connect cathode cable to the removed output cable.)

Remarks: It is recommended to use clamp ammeter which may measure it even alternator output cable

is not removed.

The reason is that if the contact of alternator terminal B is not good, it may cause output current

dropping. Therefore, if loosing terminal B to connect test ammeter suddenly when checking vehicle, it

is impossible to find out the failure reason due to contact defeat when connecting.

5. Connect a digital voltmeter between alternator terminal B and battery anode. (Connect voltmeter

anode cable to terminal B and connect volt cathode to battery anode.)

6．Install engine tachometer.

7．Connect battery cathode cable.

8． Engine cover is kept open.

9． Start on engine.

10.When engine speed is 2500r/min, motor load is adjusted by opening/closing headlamp and other

lamps, which keeps ammeter reading a little higher than 30A. Decrease engine speed slowly to

ensure ammeter reading is 30A, and at the moment read the voltmeter reading. Limit value: max.

0.3V

Remarks: When motor output power is too large to drop ammeter reading to 30A, adjust it to 40A

and read voltage difference reading. The limit value is changed to max. 0.4V at this moment.

11.If voltmeter reading is higher than limit value, we can regard it as alternator output cable defeat.

Therefore, please check wiring between alternator terminal B and battery anode (Including fuse).

If the terminal is loose or wiring color changes due to excessive heat, it should be repaired and

then make a test again.

12.Make engine running at idle speed after experiment finish

13.Shut off all lights and turn ignition switch to OFF

14.Remove battery cathode cable.

15.Remove ammeter, voltmeter and engine tachometer for test.

16.Connect alternator output cable to generator B terminal.

17.Connect battery cathode cable.

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Output Circuit Voltage Drop Measuring Schematic Diagram

Storage

battery

Voltmeter

Storage battery

Alternator

Terminal B

III. Output current

measurement experiment

The experiment is designed to check if alternator output current is OK.

1. Please check the following items before experiment.

Alternator installation status

Battery status

Remarks: It is recommended to be in the status of slight battery discharge. If using battery

full of power, it always can’t make experiment properly due to electronic load shortage.

Alternator transmission belt tension

Fuse status

If abnormal noise exists during alternator running

2. Turn ignition switch to OFF.

3. Remove battery cathode cable.

4. Remove alternator output cable from alternator terminal B. Connect a DC 0-100A ammeter in

series between terminal B and removed output cable. (Connect ammeter anode cable to terminal

B and then connect ammeter cathode cable to the removed output cable.)

Caution: The connecting components must be fixed firmly with screw and nut, for large current

will go through them. Don’t use clamp to fix them.

Remarks: It is recommended to use clamp ammeter which may measure it even alternator output

cable is not removed.

5. Connect a 0-20V voltmeter for test between terminal B and ground. (Connect voltmeter anode