IN0379
Sensor Side
ECU Side
IN0378
Sensor Side
ECU Side
IN0380
Sensor Side
ECU Side
IN0381
Pull Lightly
Looseness of Crimping
IN--22
--
INTRODUCTION
HOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMS
2 . CO NTI NUI TY CHE CK (O P E N CI RCUI T CHE CK)
(a)
Disconnect the connectors at both ECU and sensor
sides.
(b)
Measure the resistance between the applicable terminals
of the connectors.
Resistance: 1
Ω
or less
HINT:
S
Measure the resistance while lightly shaking the wire har-
ness vertically and horizontally.
S
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.
3 . RE S I S TANCE CHE CK (S HO RT CI RCUI T CHE CK)
(a)
Disconnect the connectors at both ends.
(b)
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 M
Ω
or higher
HINT:
Measure the resistance while lightly shaking the wire harness
vertically and horizontally.
4 . V I S UAL CHE CK AND CO NTACT P RE S S URE CHE CK
(a)
Disconnect the connectors at both ends.
(b)
Check for rust or foreign material, etc. in the terminals of
the connectors.
(c)
Check crimped portions for looseness or damage and
check if the terminals are secured in lock portion.
HINT:
The terminals should not come out when pulled lightly.
(d)
Prepare a test male terminal and insert it in the female ter-
minal, then pull it out.
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.
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3RZ-F,3RZ-FE
