User's Manual

21
ARE ANY RED LED’S ILLUMINATED?
GO TO SECTION III
- “INSPECTION FOR
ILLUMINATED LED’S.”
TURN IGNITION OFF AND CHECK FOLLOWING:
A. REMOVE CONNECTOR(S) FROM EC-15
™
CONTROLLER AND MEASURE
RESISTANCE BETWEEN APPROPRIATE SPEED SENSOR SIGNAL (+) AND SIGNAL
RETURN (-). RESISTANCE FOR BENDIX
®
WS-20
™
SPEED SENSOR IS BETWEEN
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
™
SPEED SENSOR, SPEED SENDER IS BETWEEN
0 - .015 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.
YES
2ND TIME TO THIS POINT
DURING TESTING?
IGNITION ON, NOTE ILLUMINATED LED’S ON LOG SHEET.
DO MAGNETIC RESET, NOTE REACTION OF RED LED’S.
GO TO SECTION VII PART
B AND BEGIN TESTING
NO
RECONNECT CONNECTORS AT EC-15
™
CONTROLLER AND SPEED SENSOR, DO MAGNETIC
RESET. NOTE RED LED’S.
GO TO SECTION VII PART
B AND BEGIN TESTING
GO TO “INITIAL START-UP PROCEDURE”
AND RED LED’S ON?
TROUBLESHOOTING
SECTION VII PART A - TESTING THE WHEEL SPEED SENSOR
GO TO SECTION IV
NO
YES
YES
NO
START HERE
NO
YES
SAME RED
LED’S ON?