Bendix Commercial Vehicle Systems MC-12 MODULATOR CONTROLLER ASSY - Manual (Page 13)

13
Troubleshooting
SECTION III
INSPECTION FOR ILLUMINATED LEDS
NOTE RED “CONT” LED IN
EC-12 ™ CONTROLLER
DIAGNOSTICS WINDOW.
START HERE
NO
ON?
INSPECTING "CONT"
LED
NO
IS EITHER OR BOTH RED
"SNS1" OR "SNS2" LED
ILLUMINATED?
IS RED "MOD" LED
ILLUMINATED?
YES
NO
TESTING "MOD"
LED
IF ANY OTHER RED LEDs
ARE ILLUMINATED,
REPLACE THE EC-12 ™
CONTROLLER AND REPEAT
THE “INITIAL START-UP
PROCEDURE”
GO TO SECTION V
“TESTING THE
MODULATOR”
YES
NOTE THE ILLUMINATED LEDS
AND GO TO SECTION VI "TESTING
THE WHEEL SPEED SENSOR"
ON?
IS THIS LED ILLUMINATED?
YES
ON?
TESTING "SNS1 or
SNS2" LEDs
REPLACE THE EC-12 ™
CONTROLLER.