Daihatsu 1997 Terios J100 Service Manual page 499

1. When center differential lock switch is turned off.
(1) The VSV1 and VSV2 become unenergized. Thus, the
VSV1 is connected to the air filter side. As a result, the
transfer actuator chamber B becomes equal to the at-
mospheric pressure.
(2) On the other hand, the intake manifold negative pres-
sure is transmitted to the check valve, VSV2, and then,
transfer actuator chamber A. Consequently, the differ-
ential clutch hub assembly of the transfer moves back-
ward. In this way, the center differential is switched to
a free state.
2. When center differential lock switch is turned on.
(1) A electric current flows into the VSV1 and VSV2. Thus,
the intake manifold negative pressure is transmitted to
the check valve, VSV1, and then, transfer actuator
chamber B.
(2) On the other hand, the VSV2 is connected to the air fil-
ter. As a result, the transfer actuator chamber A be-
comes equal
Consequently, the differential clutch hub assembly of
the transfer moves forward, thus engaging with the dif-
ferential case subassembly. In this way, the center dif-
ferential becomes in a locked state.
to the atmospheric
VSV2 Check
(green) valve
VSV1
(blue)
Check
VSV2
valve
(green)
VSV1
(blue)
VSV2 Check
valve
(green)
VSV1
(blue)
pressure.
Check
VSV2
(green)
VSV1
(blue)
TR–3
To intake
manifold
Differential
lock switch
Chamber B
Free
To intake
manifold
Differential
lock switch
Chamber B
Free
To intake
manifold
Differential
lock switch
Chamber B
Lock
To intake
manifold
Differential
lock switch
valve
Chamber B
Lock
Chamber A
JTR00006-00111
Chamber A
JTR00007-00112
Chamber A
JTR00008-00113
Chamber A
JTR00009-00114