Toyota T100 1996 Service Manual page 947

Orange Pipe
1996 TOYOTA T100 (RM449U)
EMISSION CONTROL (3RZ−FE)
12.
13.
(a)
(b)
(c)
(d)
If operation is not as specified, replace the EGR vacuum modu-
lator.
14.
15.
16.
(a)
Black Pipe
(b)
If operation is not as specified, replace the check valve.
17.
HINT:
EC0107
Install the check valve with the orange pipe facing the EGR vac-
uum modulator side.
18.
− EXHAUST GAS RECIRCULATION (EGR) SYSTEM
DISCONNECT VACUUM HOSES FROM EGR VACUUM
MODULATOR
INSPECT EGR VACUUM MODULATOR OPERATION
Block ports P and R with your finger.
Blow air into port Q, and check that the air passes through
to the air filter side freely.
Start the engine, and maintain speed at 3,500 rpm.
Repeat the above test. Check that there is a strong resis-
tance to air flow.
RECONNECT VACUUM HOSES TO EGR VACUUM
MODULATOR
REMOVE CHECK VALVE
INSPECT CHECK VALVE
Check that air flows from the orange pipe to the black
pipe.
Check that air does not flow from the black pipe to the
orange pipe.
INSTALL CHECK VALVE
INSPECT VSV FOR EGR (See page MF−44)
Author :
EC−9
Date : 937