Suzuki LT-A400, Service Manual

Page: 10 / 502

00-5 Precautions:
3) Using a test male terminal, check the female
terminals of the circuit being checked for contact
tension.
Check each terminal visually for poor contact
(possibly caused by dirt, corrosion, rust, entry of
foreign object, etc.). At the same time, check to
make sure that each terminal is fully inserted in the
coupler and locked.
If contact tension is not enough, rectify the contact to
increase tension or replace. The terminals must be
clean and free of any foreign material which could
impede proper terminal contact.
4) Using continuity inspect or voltage check procedure
as described below, inspect the wire harness
terminals for open circuit and poor connection.
Locate abnormality, if any.
Continuity check
1) Measure resistance across coupler “B” (between “A”
and “C” in figure).
If no continuity is indicated (infinity or over limit), the
circuit is open between terminals “A” and “C”.
2) Disconnect the coupler “B” and measure resistance
between couplers “A” and “B-1”.
If no continuity is indicated, the circuit is open
between couplers “A” and “B-1”. If continuity is
indicated, there is an open circuit between couplers
“B-2” and “C” or an abnormality in coupler “B-2” or
coupler “C”.
Voltage check
If voltage is supplied to the circuit being checked, voltage
check can be used as circuit check.
1) With all connectors/couplers connected and voltage
applied to the circuit being checked, measure
voltage between each terminal and body ground.
2) If measurements were taken as shown in the figure
and results were listed in the following, it means that
the circuit is open between terminals “A” and “B”.
Voltage between
“A” and body ground: Approx. 5 V
“B” and body ground: Approx. 5 V
“C” and body ground: 0 V
“B”: Check contact tension by inserting and removing.
“C”: Check each terminal for bend and proper alignment.
“D”: Looseness of crimping
“E”: Open
“F”: Thin wire (A few strands left)
“C”
“B”
I649G1000027-02
“D”
“E”
“F”
I649G1000028-02
CDI unit
“A”
“B”
“C”
I827H1000002-01
“A”
“B”
“C”
“B-2”
“B-1”
CDI unit
I827H1000003-01