TAVRIDA ELECTRIC Rec15/25 Al1 5p, User Manual, Page: 87 / 136

87
Figure 87
OSM coil inputs of heavy duty connector of RC5_4 (upper picture) and umbilical heavy duty connector from OSM side (lower
picture)
NOTE! To short circuit the two pins of the connectors use two miniature “crocodile” clips and a wire.
7.2.3.10 OSM Coil Short Circuit
Possible reason Malfunction identification procedure Corrective action
Wiring connecting drivers of the RCM
and control cable are not properly
connected
Check that wiring connecting the drivers of the RCM
and control cable are properly connected
Connect wiring properly
The RCM malfunction
Switch off the RC5_4 and the battery and wait for 2
minutes
Short circuit inputs 1 and 2 of plug “8” of the RCM
(Figure 81)
Switch on the RC5_4 and the battery
The malfunction readings should change to
“OSM
coil short circuit”
In case the
reading doesn’t change the malfunction
is in the RCM
NOTE! Remove the short circuiting wiring after the
test. Connect the wiring to the drivers properly.
Replace the RCM
Wiring assembly in the RC5_4 is open
circuited
Switch off the RC5_4 and the battery and wait for 2
minutes
Short circuit pins 1 and 3 of the RC5_4 heavy duty
connector as it is shown in Figure 82
Switch on the RC5_4 and the battery
The malfunction readings should change to
“OSM
coil short circuited”
If the reading doesn’t change the malfunction is in
wiring assembly between the RCM and control cable
NOTE! Remove the short circuiting wiring after the
test.
Replace the RC5_4
Control Cable is not connected properly
Check that the heavy duty plugs of the control cable,
OSM and RC5_4 are visually not damaged
Check that the control cable is connected properly
Connect control cable properly
Control Cable malfunction
Switch off the RC5_4 and the battery and wait for 2
minutes
Short circuit pins 37 and 39 of the heavy duty
connector of the control cable (OSM side) as it is
shown in Figure 82
Switch on the RC5_4 and the battery The
malfunction readings should change to
“OSM coil
short circuited”
If the reading doesn’t change the malfunction is in
the control cable
NOTE! Remove the short circuiting wiring after the
test.
Replace the control cable
OSM malfunction
If none of the above described actions helped it is an
OSM malfunction
Replace the OSM