Ce-niehoff-co C520 Troubleshooting Guides Manual do Utilizador descarregar pdf (Página 3)

Page 3

TG0048A

Section 2: CAN/J1939 Diagnostics

CAN/J1939 Interface

DESCRIPTION AND OPERATION

The CEN A2-326 digital regulator is compatible with

SAE J1939 communications standard for vehicle net-

working.

CEN uses MIL-STD connector MS3112E12-10P to inter-

face between the A2-326 and the vehicle J1939 databus.

Mating connector is MS3116E12-10S or equivalent.

If J1939 connection is not used, the 10-pin connector

must be covered with connector cover MS3181-12CA or

equivalent. Message content is shown in Table 2.

Identiﬁ cation

TABLE 1 – J1939 Connector

Circuit Identiﬁ cation

CANH

CANL

CAN SHIELD

Battery

Mfr use only

Temperature sensor

Voltage sensor

Current sensor

Figure 4 – J1939

Connector Pins

Regulator Readout

Expected Reading

TABLE 2 – A2-326 Regulator/J1939 Readout Diagnostics (see Table 3)

Alternator Output Voltage 28 V System

Alternator Speed

Regulator Temperature

Alternator Output

Charging System Hours

13–15 V

1200 to 8000 RPM

Less than 257 F/125ºC

0–100%

>0 hours

Action—If Expected Reading Not Present

See Chart 1, page 6.

Check drive belt and charging system connections.

Decrease load on alternator.

Varies with load.

Check drive belt and charging system connections.

TABLE 3 – Message Data

PGN Name PGN Byte 1 Byte 2 Byte 3 Byte 4 Byte 5 Byte 6 Byte 7 Byte 8

ALT RPM

0xFED5 ALT RPM

ALT VOLT

0xFEF7 VOLT SETPOINT ALT VOLT REG IGN VOLT BATT VOLT

ALT TEMP

0xFEA7 REG TEMP BATT TEMP

PROPRIETARY #1

0xFFC8 BATT

CURRENT

SHUTDOWN

COUNT

BATT AGE HOUR METER MINUTES

(0-59)

ALT LOAD

PROPRIETARY #2

0xFFC9 Proprietary Content: For Manufacturer Test Only

1 2 3 4 5 6 7 8

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