BENDIX M-21-M-22 ANTILOCK MOD ASSY Especificaciones Pagina 31

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3 Diagnostics, Troubleshooting and Testing
27
Meritor WABCO Maintenance Manual MM-0112 (Revised 05-13)
Active Braking Valves (ABV) Testing
Electrical Checks
Check ABV 3/2 solenoid by itself for resistance.
Check ECU harness and ABV 3/2 solenoid together for
resistance. Figure 3.22 and Figure 3.23.
Verify no change in resistance or open circuit between ABV by
itself and through harness.
Check harness by itself for any shorts to battery and shorts to
ground.
Measurements should read as follows:
Figure 3.22
Location Measurement
ABV Supply to ABV Common 7.0-14.0 ohm for 12V system
26.3-49.0 ohm for 24V system
At ECU harness pins with ABV
connected
Same as above, no more than 1
ohm difference
ECU harness by itself for battery
voltage or ground
No continuity
Figure 3.22
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X1X4
4007207a
CAB MOUNT ECU’S:
LOOKING INTO WIRE HARNESS CONNECTOR
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