BENDIX EC-15 ANTILOCK CONTROLLER ASSY Manual page 21

IGNITION ON, NOTE ILLUMINATED LED'S ON LOG SHEET.
START HERE
TURN IGNITION OFF AND CHECK FOLLOWING:
A. REMOVE CONNECTOR(S) FROM EC-15
RESISTANCE BETWEEN APPROPRIATE SPEED SENSOR SIGNAL (+) AND SIGNAL
RETURN (-). RESISTANCE FOR BENDIX
1500-2500 CHMS. REFER TO VEHICLE MAINTENANCE MANUAL IF OTHER THAN
™
THE WS-20 SPEED SENSOR IS IN USE. (REFER FIG.8) IF RESISTANCE NOT
CORRECT, DISCONNECT CONNECTOR AT SPEED SENSOR. INSPECT
CONNECTOR, THEN CHECK RESISTANCE BETWEEN PINS ON SENSOR. IF
RESISTANCE IS NOT CORRECT (BETWEEN 1500-2500 OHMS FOR THE BENDIX
WS-20 ™ SPEED SENSOR), REPLACE SENSOR, OTHERWISE PROCEED TO STEP B.
B. CHECK "GAP" BETWEEN SPEED SENSOR AND EXCITER OR TONE RING. (GAP
®
FOR BENDIX WS-20
INCHES) IF SENSOR GAP MUST BE ADJUSTED, CHECK FOR LOOSE OR WORN
WHEEL BEARINGS BEFORE RE-GAPPING SENSOR. REFER TO VEHICLE
MAINTENANCE MANUAL FOR WORN BEARINGS.
C. IF SENSOR GAP IS CORRECT CHECK WHEEL BEARING FOR FREE PLAY TO
VERIFY IT COMPLIES TO MANUFACTURER'S RECOMMENDATIONS.
D. MAKE CERTAIN EXCITER OR TONE RING IS IN PLACE AND INSPECT CONDITION.
CHECK FOR MISSING OR DAMAGED TEETH AND THAT IT RUNS TRUE AND
PERPENDICULAR TO SENSOR FACE.
E. CHECK WIRING HARNESS AND CONNECTORS THAT RUN TO SENSOR.
F. CHECK FOR DRAGGING BRAKES (OVER ADJUSTED, TRAPPED AIR IN ACTUATOR,
OUT OF ROUND DRUMS, FAULTY RETURN SPRINGS, PARKING BRAKE SYSTEM
FAULTS, ETC.) AND CORRECT AND RETEST.
TROUBLESHOOTING
SECTION VII PART A - TESTING THE WHEEL SPEED SENSOR
DO MAGNETIC RESET, NOTE REACTION OF RED LED'S.
2ND TIME TO THIS POINT
DURING TESTING?
AND RED LED'S ON?
™
CONTROLLER AND MEASURE
® WS-20
™
SPEED SENSOR, SPEED SENDER IS BETWEEN 0 - .015
RECONNECT CONNECTORS AT EC-15
AND SPEED SENSOR, DO MAGNETIC RESET. NOTE
RED LED'S.
ARE ANY RED LED'S ILLUMINATED?
GO TO "INITIAL START-UP PROCEDURE"
NO
YES
NO
GO TO SECTION VII PART
B AND BEGIN TESTING
™ SPEED SENSOR IS BETWEEN
™
CONTROLLER
NO
YES
GO TO SECTION VII PART
B AND BEGIN TESTING
SAME RED
NO
GO TO SECTION IV
LED'S ON?
YES
®
GO TO SECTION III -
YES
"INSPECTION FOR
ILLUMINATED LED'S."
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