Bendix Commercial Vehicle Systems EC-13 TRAILER ANTILOCK CONTROL 8/07 - Manual (Page 15)

15
SAME RED LED’s
ILLUMINATED?
NO
YES
YES
ARE ANY RED LED’s
ILLUMINATED?
INSPECT CONNECTOR AND RECONNECT
TO EC-13 ™ CONTROLLER. TURN IGNITION
ON AND PASS MAGNET OVER “RESET” ON
EC-13 ™ CONTROLLER. REMOVE MAGNET
AND NOTE REACTION OF RED LEDS.
ARE RESISTANCE
VALUES CORRECT?
YES
GO TO SECTION V B AND
CONTINUE TESTING
NO
REPEAT “INITIAL START-UP
PROCEDURE”. IF TESTING HAS
RETURNED TO THIS STEP TWICE -
REPLACE THE EC-13 ™ CONTROLLER.
REPLACE EC-13 ™
CONTROLLER
NO
GO TO SECTION III
“INSPECTION FOR
ILLUMINATED LEDS”
AND RETEST.
IF FAILURE PERSISTS,
REPLACE THE EC-13 ™
CONTROLLER.
PROBE CONNECTOR WITH VOLT/OHM METER AND NOTE THAT
PROPER RESISTANCE VALUES ARE OBTAINED FOR
MODULATOR BEING TESTED. RESISTANCE VALUES HERE FOR A
BENDIX ® M-12 ™ MODULATOR.
FRONT MODULATOR
HOLD TO SOURCE (2G TO 1G): READ 9 TO 12 OHMS
EXHAUST TO SOURCE (2F TO 1G): READ 9 TO 12 OHMS
EXHAUST TO HOLD (2F TO 2G): READ 18 TO 24 OHMS
SOURCE TO POWER (1G TO 1K, 2K): NO CONTINUITY
SOURCE TO GROUND (1G TO 1A, 2A): NO CONTINUITY
REAR MODULATOR
HOLD TO SOURCE (1C TO 1D): READ 9 TO 12 OHMS
EXHAUST TO SOURCE (1B TO 1D): READ 9 TO 12 OHMS
EXHAUST TO HOLD (1B TO 1C): READ 18 TO 24 OHMS
SOURCE TO POWER (1D TO 1K, 2K): NO CONTINUITY
SOURCE TO GROUND (1D TO 1A, 2A): NO CONTINUITY
TURN IGNITION OFF. DISCONNECT
30 PIN WIRE HARNESS CONNECTOR
FROM EC-13 ™ CONTROLLER.
START HERE
WIRE HARNESS CONNECTOR
2F
EXHAUST
2G
HOLD
1A, 2A
GROUND
1K, 2K
POWER
1G
SOURCE
1C
HOLD
1B
EXHAUST
1D
SOURCE
MAGNET HERE
RESETTING
EC-13 ™
CONTROLLER
Troubleshooting
SECTION V PART A
TESTING THE MODULATOR