COMMON RAIL SYSTEM
V3800-CR-TE4,V3800-CR-TIE4, DM
1-S294
Check for Continuity
1. Remove connectors
"A"
and
"C"
and measure resistance
between the two.
(Reference)
• Measure resistance while gently shaking the wiring harness up
and down, and side-to-side.
2. In the case of Figure
A-2
, there is no continuity (open circuit)
between terminal 1 of connector
"A"
and terminal 1 of
connector
"C"
. However, there is continuity between terminal 2
of connector
"A"
and terminal 2 of connector
"C"
. As a result, it
can be said that there is an open circuit between terminal 1 of
connector
"A"
and terminal 1 of connector
"C"
.
3. Remove connector
"B"
and measure the resistance in the
connector.
4. In the case of Figure
A-3
, there is continuity between terminal 1
of connector
"A"
and terminal 1 of connector
"B1"
. However,
there is no continuity (open circuit) between terminal 1 of
connector
"B2"
and terminal 1 of connector
"C"
. As a result, it
can be said that there is an open circuit between terminal 1 of
connector
"B2"
and terminal 1 of connector
"C"
.
9Y1200192CRS0590US0
Check Voltage
1. In the case of the circuit that supplies voltage to the ECU
connector terminals, check for an open circuit by performing a
voltage check.
2. As depicted in Figure
A-4
, measure the voltage of the ECU 5 V
output terminal between the body ground and terminal 1 of
connector
"A"
with all connectors connected. Next, measure in
order the voltage between terminal 1 of connector
"B"
and the
body ground, and terminal 1 of connector
"C"
and the body
ground.
3. The faulty circuit and measurement results are as per below.
(Measurement Results)
• Voltage between terminal 1 of connector
"A"
and the body
ground is 5 V.
• Voltage between terminal 1 of connector
"B"
and the body
ground is 5 V.
• Voltage between terminal 1 of connector
"C"
and the body
ground is 0 V.
(Faulty Circuit)
• There is an open circuit between terminal 1 of connector
"B"
and terminal 1 of connector
"C"
.
9Y1200192CRS0591US0
Short Circuit Check
1. As per Figure
A-5
, if there is a short in the wiring harness
ground, perform a
"Ground continuity check"
to determine
the source of the short.
9Y1200192CRS0592US0
Factory
specification
Less than 1
Ω
(1) Sensor
(2) ECU
(1) Sensor
(2) ECU
(1) Sensor
(2) Short Circuit
(3) ECU
KiSC issued 05, 2012 A