BENDIX EC-17 ANTILOCK TRACTION CONTROL Manual page 26

SECTION VII B - TESTING THE WHEEL SPEED SENSOR
START HERE FROM
SECTION VII A
30 PIN CONNECTOR
K J H G F E D C B A
J2 LEFT FRONT W. S. RTN
J1 LEFT FRONT W. S. SIGNAL
H3 RIGHT FRONT W. S. RTN
H2 RIGHT FRONT W. S. SIGNAL
A1,2,3 GROUND
B1,K2,3 POWER
18 PIN CONNECTOR
1
2
3
F E D C B A
C3 LEFT MID W.S. RTN.
C2 LEFT MID W.S. SIGNAL
F3 LEFT REAR W.S. RTN
F2 LEFT REAR W.S. SIGNAL
B3 RIGHT MID W.S. RTN.
B2 RIGHT MID W.S. SIGNAL
E3 RIGHT REAR W.S. RTN
E2 RIGHT REAR W.S. SIGNAL
26
SAME LEDs ILLUMINATED?
IGNITION OFF. REMOVE CONNECTOR FROM EC-17
CONTROLLER. MEASURE RESISTANCE BETWEEN THE
APPROPRIATE SPEED SIGNAL (+) AND SIGNAL RETURN (-).
RESISTANCE FOR BENDIX
2500 OHMS. REFER TO VEHICLE MANUAL FOR THE
1
RESISTANCE VALUES IF OTHER THAN WS-20
2
IN USE. CHECK CONTINUITY BETWEEN POWER (B1,K2,3)
3
AND SPEED SIGNAL THEN BETWEEN GROUND (A1,2,3)
AND SPEED SIGNAL. NO CONTINUITY PERMITTED.
CORRECT RESISTANCE?
DISCONNECT CONNECTOR AT SPEED SENSOR.
INSPECT THE CONNECTOR, THEN CHECK THE
RESISTANCE BETWEEN TWO PINS ON SENSOR.
RESISTANCE BETWEEN 1500-2500 OHMS FOR THE
BENDIX ® SENSORS. NO CONTINUITY PERMITTED
BETWEEN GROUND (A1, 2, 3) AND SPEED SIGNAL.
RECONNECT CONNECTOR AT SPEED
SENSOR AND EC-17
AND DO MAGNETIC RESET. NOTE IF
ANY RED LEDS ARE ILLUMINATED.
ARE ANY LEDs ILLUMINATED?
ARE SAME RED LEDs ILLUMINATED ?
REPAIR OR REPLACE SPEED
SENSOR WIRING HARNESS
NO
YES
™
® SENSORS IS BETWEEN 1500-
™
SENSOR IS
YES
NO
YES
™ CONTROLLER
NO
YES
YES
GO TO SECTION III "INSPECTION
FOR ILLUMINATED LEDs"
REPLACE THE EC-17
CONTROLLER.
NO
REPLACE THE SENSOR
REPEAT THE "INITIAL
START-UP PROCEDURE".
NO
GO TO SECTION III "INSPECTION
FOR ILLUMINATED LEDs"
™