Toyota Celica 2005 Repair Manual page 387

DI−188
Crankshaft
Position
Sensor
Camshaft
Position
Sensor
Other Sensors
(Engine Coolant Tem-
perature Sensor, Mass
Air Flow Sensor, Throttle
Position Sensor, etc.)
DTC No.
P0351
P0352
No IGF signal to ECM while engine is running
P0353
P0354
IGT signal waveform
IGT
IGF
20 m sec./ Division
2005 CELICA (RM1131U)
DIAGNOSTICS
ECM
IGT1
IGF
IGT2
IGT3
IGT4
TACH
To Tachometer
DTC Detection Condition
Reference: INSPECTION USING OSCILLOSCOPE
2 V/
During cranking or idling, check waveform between terminals
Division
IGT1 − 4 and E1 of the ECM connector.
HINT:
Correct waveform appears as shown, with rectangle waves.
GND
GND
B16829
− ENGINE (1ZZ−FE)
From Battery
Igniter
Ignition Coil
No.2 Ignition
Coil with Igniter
No.3 Ignition
Coil with Igniter
No.4 Ignition
Coil with Igniter
S Ignition system
S Open or short in IGF or IGT circuit from ignition coil with ignit-
er to ECM (ignition coil circuit 1 through 4)
S No. 1 to No. 4 ignition coil with igniter (primary ignition)
S ECM
386
No.1 Ignition
Coil with Igniter
No. 1 Spark Plug
No. 2 Spark Plug
No. 3 Spark Plug
No. 4 Spark Plug
Trouble Area
A21421