BENDIX EC-16 ANTILOCK CONTROLLER Manual page 29

SECTION XI - TESTING TRACTION CONTROL MODULATOR
START HERE
GO TO SECTION XII "TESTING ENGINE
CONTROL MODULE WIRE HARNESS"
CHECK CONDITION OF 18 PIN
CONNECTOR CLEAN, RECONNECT,
TURN IGNITION ON & PASS MAGNET
™
OVER EC-16 CONTROLLER
RESET. REPEAT "INITIAL START-UP
PROCEDURE"
REPLACE ANTILOCK
TRACTION RELAY
(MODULATOR)
WITH IGNITION ON, INSPECT EC-16
CONTROLLER FOR ILLUMINATED LEDs
YES
IS "TRC" ONLY ON?
ARE "TRC" AND "MOD"
LEDs ON?
TURN IGNITION OFF AND REMOVE 18 PIN
CONNECTOR FROM EC-16
CHECK RESISTANCE BETWEEN PINS D2 & D3.
RESISTANCE SHOULD BE 10 - 12 OHMS.
REMOVE 30 PIN CONNECTOR AND CHECK
CONTINUITY BETWEEN GROUND (A1,2,3) AND
D2 & D3. NO CONTINUITY PERMITTED.
YES
RESISTANCE CORRECT & NO
CONTINUITY TO GROUND?
DISCONNECT 2 PIN CONNECTOR AT MODULATOR &
CHECK RESISTANCE OF CONNECTOR HALF ATTACHED
TO ANTILOCK TRACTION RELAY. RESISTANCE SHOULD
BE 10 - 12 OHMS. THEN CHECK CONTINUITY BETWEEN
GROUND ON 30 PIN CONNECTOR (A1,2,3) AND BOTH
PINS ON THE 2 PIN CONNECTOR LEADING TO THE
MODULATOR. NO CONTINUITY PERMITTED.
NO
RESISTANCE CORRECT & NO
CONTINUITY TO GROUND?
REPAIR OR REPLACE WIRE
HARNESS (FROM 18 PIN
CONNECTOR TO 2
PIN CONNECTOR)
™
NO
YES
™ CONTROLLER.
NO
YES
These LEDs
Illuminated?
D2
D3
1
2
3
F E D C B A
18 PIN CONNECTOR
F E D C B A
1
2
3
D2
D3
2 pin Modulator
Connector
EC-16 ™ Controller and
AntiLock Traction Relay
(Modulator)
30 PIN CONNECTOR
K J H G F E D C B A
A1 GROUND
A2 GROUND
A3 GROUND
1
2
3
29