Toyota Celica 2005 Repair Manual page 392

4 Check for open and short in harness and connector in IGT signal circuit between
ECM and ignition coil with igniter (See page IN−30).
OK
5 Check voltage between terminals IGT1 to 4 of ECM connector and body ground.
ON
IGT3 IGT1
IGT4 IGT2
A09084
OK
6 Check voltage between terminals IGT1 to 4 of ECM connector and body ground.
ON
IGT3 IGT1
IGT4 IGT2
A09084
OK
2005 CELICA (RM1131U)
DIAGNOSTICS − ENGINE (1ZZ−FE)
NG Repair or replace harness or connector.
PREPARATION:
Remove the ECM cover.
CHECK:
Measure voltage between terminals IGT1 to 4 of the ECM con-
nector and body ground when engine is cranked.
OK:
Voltage: More than 0.1 V and less than 4.5 V
A09092
NG Replace ECM (See page SF−78).
PREPARATION:
Disconnect the ignition coil with igniter connector.
CHECK:
Measure voltage between terminals IGT1 to 4 of the ECM con-
nector and body ground when engine is cranked.
OK:
Voltage: 4.5 V or more
A09092
NG Replace ECM (See page SF−78).
391
DI−193