Toyota Celica 2005 Repair Manual page 569

DI−370
2 Check voltage of mass air flow meter power source.
ON Wire Harness Side:
BE6653
P24310
OK
3 Check voltage between terminal VG of ECM connector and body ground.
VG
A19522
NG
4 Check for open and short in harness and connector between mass air flow meter
and ECM (See page IN−30).
OK
Replace mass air flow meter.
2005 CELICA (RM1131U)
DIAGNOSTICS
PREPARATION:
(a)
(b)
CHECK:
Measure voltage between terminal 1 of mass air flow meter con-
nector and body ground.
OK:
1(+)
A00099
NG
PREPARATION:
(a)
(b)
CHECK:
Measure the voltage between terminal VG of the ECM connec-
tor and body ground while the engine is idling.
OK:
A19630
OK
NG
− ENGINE (2ZZ−GE)
Disconnect the mass air flow meter connector.
Turn ignition switch ON.
Voltage: 9 to 14 V
Go to step 5.
Remove the ECM cover.
Start the engine.
Voltage:
1.1 to 1.5 V (P or N position and A/C switch OFF)
Replace ECM (See page SF−78).
Repair or replace harness or connector.
568