BENDIX MC-30 TRAILER ABS CONTROLLER Guía para resolver problemas descargar pdf (Pagina 30)

30

SECTION K - TROUBLESHOOTING EC-30

™

CONTROLLER

SERIAL COMMUNICATION

For vehicles using J1939, verify

continuity between the 30-pin

connector (pins C3, D2, D3) and

the 3-pin engine or dash controller

connector.

For vehicles using J1922, verify

wire continuity between the 30-pin

connector (pins B2, B3) and the 2-pin

engine or dash controller connector.

For vehicles using J1587, verify

wire continuity between the 30-pin

connector (pins G2, G3) and the 2-pin

dash controller connector.

Verify no continuity from serial

communication pins to ground

(except pin D2). Verify +12 VDC is not

measured at any serial communication

pin. Check for corroded or damaged

serial communication wiring and

connections. If a circuit fault is found,

isolate the area needing repair

by repeating the measurements

at all serial communication link

connectors.

Make repairs to serial communication

wiring. Reconnect all connectors to the

EC-30

™

controller and engine. Reset

any fault codes by briefly holding

a magnet in place at the RESET

location of the diagnostic display.

Then rerun the power-up sequence.

Go to Sections A and B.

TRC LED and ATC active/warning

lamp are on.

C3 Engine Communication, J1939 H

D3 Engine Communication, J1939 L

D2 Engine Communication, J1939 Shield

B2 Engine Communication, J1922 +

B3 Engine Communication, J1922 -

G2 Diagnostic, J1587, Serial A

G3 Diagnostic, J1587, Serial B

If the EC-30

™

controller has just been

conﬁ gured or replaced, verify that the

EC-30

™

controller is conﬁ gured to

operate the warning lamp(s) using the

appropriate serial communications

link. The Bendix ABS Diagnostic

Software program will be needed to

verify this level of conﬁ guration. If the

EC-30

™

controller was replaced with

the correct replacement part number,

this step is not necessary.

If the EC-30

™

controller is conﬁ gured

properly, verify proper operation of

the vehicle dash controller.

Warning lamp(s) controlled by

serial communication link not

functioning properly.

Turn ignition off and remove the

30-pin connector from the EC-30

™

controller. Also remove the dash

controller connector.

Turn ignition off and remove the 30-pin

connector from the EC-30

™

controller.

Also remove the 2- or 3-pin connector

at engine controller.

Verify proper operation of the electronic

engine controller.

1

2

3

K J H G F E D C B A

30-Pin Connector

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