Toyota Celica 2005 Repair Manual page 397

DI−198
INSPECTION PROCEDURE
1 Check DTC other than P0420.
If DTCs other than P0420 are present, troubleshoot those DTCs first.
RESULT:
A
2 Check gas leakage on exhaust system.
OK
2005 CELICA (RM1131U)
DIAGNOSTICS
DTC
P0420
P0420 and others
− ENGINE (1ZZ−FE)
B Go to relevant DTC chart (See page DI−42).
NG Repair or replace exhaust gas leakage point.
396
Proceed to
A
B