the connector (i.e., all terminals aligned at the
same depth) and terminal integrity (i.e., that termi-
nals are not loose, open/bent, etc.). For connec-
tors whose terminals are not visible (e.g. Marelli
control unit) use a metal cable of suitable diameter
and introduce it carefully in the connector slot at
the same depth as for the other terminals of the
connector.
CAUTION
IN CASE OF TEMPORAL MALFUNCTIONING, CARRY OUT
ALL DUE CHECKS LOOKING FOR FAULT BY MOVING
SLIGHTLY THE CABLE HARNESS BEING INSPECTED.
3. Pulling the cables slightly from the back of the connector in order to check the correct position of the
terminals on the connector and of the cable on the terminal.
CONTINUITY check
Check goal: this control is to check that there are not any circuit interruptions nor excessive resistance,
for instance caused by rust, on the two terminals being inspected.
Tester: set the tester on the "continuity" symbol and place the tester probes on the two circuit ends:
the tester emits a sound signal only if there is continuity; the tester can also be set to the Ohm symbol
to check that the circuit resistance is null or a few tenths of an Ohm.
CAUTION: THE CIRCUIT SHOULD NOT BE ENERGISED, OTHERWISE THE TEST IS IRRELE-
VANT.
GROUND CONNECTION check
Check goal: this control is to check if a cable or a circuit is in contact with the vehicle ground (-)
connection.
Tester: set the tester on the "continuity" symbol and place one tester probe on the vehicle ground
connection (or on the battery - terminal) and the other probe on the cable being inspected: the tester
sends out a sound signal only if there is continuity. The tester can also be set to the Ohm symbol to
check that the circuit resistance is null or a few tenths of an Ohm.
CAUTION! IF THERE IS A GROUND CONNECTION COMING FROM THE CONTROL UNIT, MAKE
SURE THAT DURING THE TEST THE CONTROL UNIT IS GROUND CONNECTED TO THE CIR-
CUIT.
VOLTAGE check
Check goal: this control is to check if a cable is energised, i.e. if it receives power supply from the
battery or the control unit.
Tester: set the tester on the direct current symbol and place the tester red probe on the cable being
inspected and the black probe on the vehicle ground connection (or on the battery - terminal).
CAUTION
IN CASE OF TEMPORAL MALFUNCTIONING, CARRY OUT ALL DUE CHECKS LOOKING FOR
FAULT BY MOVING SLIGHTLY THE CABLE HARNESS BEING INSPECTED.
RSV4 R Electrical system
ELE SYS - 135
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