Bendix Commercial Vehicle Systems EC-14 ANTILOCK CONTROLLER 5/04 - Manual (Page 18)

18
TROUBLESHOOTING
SECTION VI A
TESTING FOR THE FRONT MODULATOR
EC-14 ™ Controller Wire
Harness Connector
Probe connector with volt/ohm meter and not that proper
resistance values are obtained for modulator being tested.
Resistance values here for Bendix ® M-21 ™ modulator.
Hold to Source (2G to 1G): .................... Read 3.5 to 5 Ohms
Exhaust to Source (2F to 1G): ............... Read 3.5 to 5 Ohms
Exhaust to Hold (2F to 2G): ................... Read 7 to 10 Ohms
Source to Power (1G to 1K, 2K): ........... No Continuity
Source to Ground (1G to 1A, 2A): .......... No Continuity
Hold to Power (2G to 1K, 2K): ............... No Continuity
Hold to Ground (2G to 1A, 2A): .............. No Continuity
Exhaust to Power (2F to 1K, 2K): ........... No Continuity
Exhaust to Ground (2F to 1A, 2A): ......... No Continuity
NO
Go to Section VI B and
continue testing
Are resistance values correct?
1A & 2A
GROUND
2F
EXHAUST
2G
HOLD
1K, 2K
POWER
1G
SOURCE
Inspect connector and reconnect to EC-14 ™
controller. Turn ignition on and pass magnet
over “RESET” on EC-14
™ controller. Remove
magnet and note reaction of red LEDs
Are any red LEDs
illuminated?
Repeat the “Initial Start-up
Procedure.” If testing has
returned to this step
twice, replace the EC-14 ™
controller and retest.
YES
NO
Are same red LEDs
illuminated?
Replace EC-14 ™ controller.
Repeat the “Initial Start-up
Procedure”
YES
NO
Go to Section IV
“Inspection for Illuminated
Red LEDs” and retest
YES
Turn ignition off, disconnect wire
harness connector from EC-14 ™
controller.
START HERE