BENDIX MC-12 MODULATOR CONTROLLER ASSY Manual page 15

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M-12 MODULATOR
4 PIN CONNECTOR
WHITE
WHITE
MAGNET HERE
RESETTING
EC-12 ™ CONTROLLER
Troubleshooting
SECTION V
TESTING THE MODULATOR
TURN IGNITION OFF AND DO NOT APPLY BRAKES.
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SEPARATE EC-12 CONTROLLER FROM THE M-12
MODULATOR. DISCONNECT 4 PIN CONNECTOR
BETWEEN M-12 ™ MODULATOR & EC-12
CONTROLLER AND TEST RESISTANCE ON THE
MODULATOR CONNECTOR
BLACK to BLACK READ 9 to 12 OHMS
WHITE to WHITE READ 9 to 12 OHMS
BLACK
BLACK
ARE RESISTANCE
VALUES CORRECT?
YES
INSPECT CONNECTOR AND RECONNECT TO
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EC-12 CONTROLLER. TURN IGNITION ON &
APPLY & HOLD BRAKES ON. PASS
MAGNET OVER "RESET" ON EC-12
CONTROLLER. REMOVE MAGNET AND
NOTE REACTION OF RED LEDS.
ARE ANY RED LED's
ILLUMINATED?
YES
SAME RED LED's
ILLUMINATED?
NO
GO TO SECTION III
"INSPECTION FOR
ILLUMINATED LEDS"
AND RETEST.
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START HERE
NO
REPLACE
M-12 ™ MODULATOR
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REPEAT "INITIAL START-UP PROCEDURE".
NO
IF TESTING HAS RETURNED
TO THIS STEP TWICE - REPLACE THE
EC-12 ™ CONTROLLER.
YES
REPLACE EC-12 ™
CONTROLLER
IF FAILURE PERSISTS,
REPLACE THE EC-12
CONTROLLER.
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