FI SYSTEM DIAGNOSIS 12-7
• 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.
*1 Check contact tension by insert-
ing and removing.
*2 Check each terminal for bend
and proper alignment.
• 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.
A
Looseness of crimping
B
Open
C
Thin wire (a few strands left)
Continuity check
• Measure resistance across coupler
B
(between
A
and
C
in
the figure).
If no continuity is indicated (infinity or over limit), the circuit is
open between terminals
A
and
C
.
1
ECM
• Disconnect the coupler
B
and measure resistance between
couplers
A
and
B
.
If no continuity is indicated, the circuit is open between cou-
plers
A
and
B
. If continuity is indicated, there is an open cir-
cuit between couplers
B
’ and
C
or an abnormality in coupler
B
’ or coupler
C
.
1
ECM
*1
*2
