Toyota T100 1996 Service Manual page 340

DI−76
5 Check VSV for EGR.
ON
System is OFF
Air
E F
BE6653
FI7205 FI7206
NG
6 Check operation of VSV for EGR (See page MF−44).
OK
Check for short in harness and connector be-
tween VSV and ECM (See page IN−26).
7 Check EGR vacuum modulator (See page MF−44).
OK
1996 TOYOTA T100 (RM449U)
DIAGNOSTICS
PREPARATION:
Select the "ACTIVE TEST" mode on the TOYOTA hand−held
tester.
CHECK:
System is ON
Check operation of VSV when it is operated by the TOYOTA
hand−held tester.
Air
OK:
E F
OK
A00071
NG
NG
− ENGINE (3RZ−FE)
EGR system is OFF:
Air flows from port E to port F.
EGR system is ON:
Air does not flow from port E to port F.
Go to step 7.
Replace VSV for EGR.
Repair or replace.