User guide

24
SECTION VII A - TESTING THE WHEEL SPEED SENSOR
START HERE
IGNITION ON, NOTE ILLUMINATED LED's.
DO MAGNETIC RESET, NOTE REACTION OF RED LEDs.
2nd TIME TO THIS POINT DURING TESTING?
GO TO SECTION VII PART B
AND BEGIN TESTING
YES
ANY RED LEDs ON?
SAME RED LEDs ON?
YES
NO
GO TO SECTION VII PART B
AND BEGIN TESTING
NO
NO
YES
GO TO SECTION IV.
RECONNECT CONNECTORS AT EC-16
™
CONTROLLER
AND SPEED SENSOR, DO MAGNETIC RESET. NOTE
RED LEDs.
GO TO "INITIAL START-UP PROCEDURE"
YES
ARE ANY RED LEDs ILLUMINATED?
GO TO SECTION III "INSPECTION FOR
ILLUMINATED LEDs."
NO
TURN IGNITION OFF AND CHECK FOLLOWING:
A . CHECK "GAP" BETWEEN SPEED SENSOR AND EXCITER OR TONE
RING. (GAP FOR BENDIX
®
WS-20
™
, 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.
B. IF SENSOR GAP IS CORRECT CHECK WHEEL BEARING FOR FREE PLAY
TO VERIFY IT COMPLIES TO MANUFACTURER’S RECOMMENDATIONS.
C. 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.
D. CHECK WIRING HARNESS AND CONNECTORS THAT RUN TO SENSOR.
E. 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.