Toyota Celica 2005 Repair Manual page 825

DI−626
3 Check air injection system No. 1 hose.
CHECK:
(a) Check that the air injection hose No. 1 is securely connected to both exhaust manifold and air switching
valve.
(b) Inspect the air injection hose No. 1 for blockage or damage.
OK
4 Check vacuum hose and check valve.
Blue
VSV
OK
5 Check air switching valve (See page EC−12).
OK
DIAGNOSTICS
NG
CHECK:
(a)
(b)
(c)
Black
(d)
Engine
A21275
NG
NG
− ENGINE (2ZZ−GE)
Repair or replace air injection system No. 1
hose.
Check each vacuum hose connection between the pres-
sure sensor and air switching valve, the air switching
valve and the VSV, and the VSV and intake manifold.
Inspect the vacuum hose for blockage or damage.
Check that check valve is correctly installed.
Check that there is air−flow in the check valve from the
VSV to the engine. Also, check that there is no air−flow
in the opposite side.
Repair or replace vacuum hose and check
valve.
Replace air switching valve.
824