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Fig. 1
OPEN
C
Sensor
1
2
Fig. 2
C
Sensor
1
2
Fig. 3
B2
C
Sensor
1
1
2
INTRODUCTION
FI7187
ECU
B
A
1
1
1
2
2
2
Z17004
ECU
A
B
1
1
2
2
Z17005
ECU
B1
A
1
1
2
2
2
Z17807
- -
HOW TO TROUBLESHOOT ECU CONTROLLED
SYSTEMS
5 .
CO NNE CTO R HANDLI NG
When inserting tester probes into a connector, insert them from
the rear of the connector. When necessary, use mini test leads.
For water resistant connectors which cannot be accessed from
behind, take good care not to deform the connector terminals.
6 .
CHE CK O P E N CI RCUI T
For the open circuit in the wire harness in Fig.1, perform "(a)
Continuity Check" or "(b) Voltage Check" to locate the section.
(a)
Check the continuity.
(1)
Disconnect connectors "A" and "C" and measure
the resistance between them.
In the case of Fig.2,
Between terminal 1 of connector "A" and terminal 1
of connector "C" → No continuity (open)
Between terminal 2 of connector "A" and terminal 2
of connector "C" → Continuity
Therefore, it is found out that there is an open circuit
between terminal 1 of connector "A" and terminal 1
of connector "C".
(2)
Disconnect connector "B" and measure the resis-
tance between them.
In the case of Fig.3,
Between terminal 1 of connector "A" and terminal 1
of connector "B1" → Continuity
Between terminal 1 of connector "B2" and terminal
1 of connector "C" → No continuity (open)
Therefore, it is found out that there is an open circuit
between terminal 1 of connector "B2" and terminal
1 of connector "C".
3RZ-F,3RZ-FE
Pages From Supplement
TO MODEL INDEX
CONTINUED
IN- -23
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