Explanation And Precaution Related To Harness Checking - Mitsubishi 1989-1993 GALANT Service Manual

FUEL SYSTEM <SOHC-8 VALVE> - Troubleshooting
I Connector
Test harness
set (MB991348)
Jumper wire
Harness
EXPLANATION AND PRECAUTION RELATED TO
HARNESS CHECKING
Connector symbols are described as seen from the end of
l
the terminal for the connector.
The abbreviation "B+" used for the normal judgment value
l
when checking the voltage is the abbreviation for battery
positive voltage.
Be sure to use the special tool (test harness) when, for a
l
waterproof connector, checking while the circuit is conduc-
tive.
If a probe is inserted from the harness side, the waterproof
capability will be lowered, thereby causing/corrosion,
never do so.
If there is no test harness compatible with the connector, it
is OK to use the test harness set (MB991348) that can be
directly connected between terminals.
When a connector is disconnected in order to check
l
terminal voltage, etc., never insert a probe if the terminal to
be checked is a female pin, because the forceful insertion
of a probe will cause improper or incomplete contact.
l When checking for damaged or disconnected wiring of a
harness (open circuit) and if both ends of the harness are
unconnected, use a jumper wire to ground one end of the
harness, and then check for continuity between the other
end and ground. By doing this, you can check for damaged
or disconnected wiring ., and, if there is no continuity, the
harness should be repaired.
When checking for a harness short-circuit (short-circuit to
l
ground), open one end of the harness and then check for
continuity between the other end and ground.
If there is continuity, the harness is short-circuited to
ground and should be repaired.
TSB Revision
13-9
SO