Toyota Celica 2005 Repair Manual page 690

INSPECTION PROCEDURE
HINT:
Read freeze frame data using the hand−held tester or the OBD II scan tool. Freeze frame data records the
engine conditions when a malfunction is detected. When troubleshooting, freeze frame data can help deter-
mine if the vehicle was running or stopped, if the engine was warmed up or not, if the air−fuel ratio was lean
or rich, as well as other data from the time when a malfunction occurred.
1 Check spark plug and spark of misfiring cylinder (See page IG−1).
OK
2 Check for open and short in harness and connector in IGF signal circuit between
ECM and ignition coil with igniter (See page IN−30).
OK
3 Check voltage between terminals IGF of ECM connector and body ground.
IGF
ECM Connector
A19522
OK
Replace ignition coil with igniter.
2005 CELICA (RM1131U)
DIAGNOSTICS − ENGINE (2ZZ−GE)
NG Go to step 4.
NG Repair or replace harness or connector.
PREPARATION:
(a) Remove the ECM cover.
(b) Disconnect the ignition coil with igniter connector.
(c) Turn the ignition switch ON.
CHECK:
Measure voltage between terminals IGF of the ECM connector
and body ground when engine is cranked.
OK:
Voltage: 4.5 to 5.5 V
A19630
NG Replace ECM (See page SF−78).
689
DI−491