Continuity Check (Open Circuit Check); Resistance Check (Short Circuit Check); Visual Check And Contact Pressure Check - Toyota T100 1996 Service Manual

Sensor Side
ECU Side
Sensor Side
ECU Side
Sensor Side
Looseness of Crimping
1996 TOYOTA T100 (RM449U)
INTRODUCTION
2.
ECU Side
(a)
(b)
HINT:
S
S
IN0379
IN0378
3.
(a)
(b)
HINT:
Measure the resistance while lightly shaking the wire harness
vertically and horizontally.
IN0380
4.
(a)
(b)
(c)
Pull Lightly
HINT:
The terminals should not come out when pulled lightly.
(d)
IN0381
NOTICE:
When testing a gold−plated female terminal, always use a
gold−plated male terminal.
HINT:
When the test terminal is pulled out more easily than others,
there may be poor contact in that section.
− HOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMS

CONTINUITY CHECK (OPEN CIRCUIT CHECK)

Disconnect the connectors at both ECU and sensor
sides.
Measure the resistance between the applicable terminals
of the connectors.
Measure the resistance while lightly shaking the wire har-
ness vertically and horizontally.
When tester probes are inserted into a connector, insert
the probes from the back. For waterproof connectors in
which the probes cannot be inserted from the back, be
careful not to bend the terminals when inserting the tester
probes.

RESISTANCE CHECK (SHORT CIRCUIT CHECK)

Disconnect the connectors on both ends.
Measure the resistance between the applicable terminals
of the connectors and body ground. Be sure to carry out
this check on the connectors on both ends.
Resistance: 1 MΩ or higher

VISUAL CHECK AND CONTACT PRESSURE CHECK

Disconnect the connectors at both ends.
Check for rust or foreign material, etc. in the terminals of
the connectors.
Check crimped portions for looseness or damage and
check if the terminals are secured in lock portion.
Prepare a test male terminal and insert it in the female ter-
minal, then pull it out.
IN−27