Toyota Celica 2005 Repair Manual page 822

5 Check vacuum hose and check valve.
Blue
VSV
OK
6 Check air switching valve (See page EC−12).
OK
7 Check vacuum switch valve (See page EC−12).
OK
8 Check for open and short in harness and connector between ECM and VSV for
secondary air injection system.
OK
DIAGNOSTICS
CHECK:
(a)
(b)
(c)
Black
(d)
Engine
A21275
NG
NG
NG
NG
− ENGINE (2ZZ−GE)
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.
Replace vacuum switching valve.
Repair or replace harness or connector.
821
DI−623