Bendix Commercial Vehicle Systems EC-16 ANTILOCK CONTROLLER 4/08 - Manual (Page 22)

22
SECTION VI A - TESTING THE MODULATOR
INSPECT CONNECTOR AND RECONNECT TO
EC-16 ™ CONTROLLER. TURN IGNITION ON AND
PASS MAGNET OVER RESET ON EC-16 ™
CONTROLLER. NOTE REACTION OF RED LEDs.
SAME RED LEDs
ILLUMINATED?
REPEAT “INITIAL START-UP
PROCEDURE.” IF THIS TEST STEP
HAS REPEATED TWICE - REPLACE
THE EC-16 ™ CONTROLLER.
NO
YES
YES
NO
GO TO SECTION VI B AND
CONTINUE TESTING
NO
YES
F E D C B A
1
2
3
K J H G F E D C B A
H1 LEFT FRONT MOD. COMMON
F1 LEFT FRONT MOD. EXHAUST
G1 LEFT FRONT MOD. HOLD
C1 RIGHT FRONT MOD. COMMON
E1 RIGHT FRONT MOD. EXHAUST
D1 RIGHT FRONT MOD. HOLD
F1 LEFT REAR MOD. COMMON
D1 LEFT REAR MOD. EXHAUST
E1 LEFT REAR MOD. HOLD
A1 RIGHT REAR MOD. COMMON
C1 RIGHT REAR MOD. EXHAUST
B1 RIGHT REAR MOD. HOLD
1
2
3
REPLACE THE EC-16 ™
CONTROLLER.
GO TO SECTION IV
“INSPECTION FOR
ILLUMINATED LEDs”
AND RETEST.
18 PIN CONNECTOR 30 PIN CONNECTOR
TURN IGNITION OFF. REFER TO
ILLUSTRATION, DISCONNECT WIRE
HARNESS CONNECTOR FROM
EC-16 ™ CONTROLLER.
START HERE
ARE RESISTANCE
VALUES CORRECT?
ARE ANY RED LEDs
ILLUMINATED?
PROBE CONNECTOR WITH VOLT/OHM METER AND NOTE THAT
PROPER RESISTANCE VALUES ARE OBTAINED FOR MODULA-
TOR BEING TESTED. RESISTANCE VALUES HERE FOR BENDIX ®
M-21 ™ MODULATOR.
HOLD TO COMMON: READ 3.5 TO 5 OHMS
EXHAUST TO COMMON: READ 3.5 TO 5 OHMS
EXHAUST TO HOLD: READ 7 TO 10 OHMS
COMMON TO GROUND: NO CONTINUITY
HOLD TO BATTERY POWER: NO CONTINUITY
HOLD TO GROUND: NO CONTINUITY
EXHAUST TO GROUND: NO CONTINUITY