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IG0317
IG0151
A09027 A09093
1.1 mm (0.043 in.)
A09084
A09092
#10
#20
ON
#30
#40
DI–68
–DIAGNOSTICS ENGINE
2000 CELICA (RM744U)
2 Check spark plug and spark of misfiring cylinder.
PREPARATION:
(a) Disconnect the high–tension cord.
(b) Remove the spark plug.
CHECK:
(a) Check for carbon deposits on electrode.
(b) Check electrode gap.
OK:
(b) No large carbon deposit present.
Not wet with gasoline or oil.
(c) Electrode gap: 1.1 mm (0.043 in.)
PREPARATION:
(a) Install the spark plug to the high–tension code.
(b) Disconnect the injector connector.
(c) Ground spark plug.
CHECK:
Check if spark occurs while engine is being cracked.
NOTICE:
To prevent excess fuel being injected from the injectors
during this test, do’nt crank the engine for more than 5 – 10
seconds at a time.
OK:
Spark jumps across electrode gap.
NG Replace or check ignition system (See page
IG–1).
OK
3 Check voltage of ECM terminal for injector of failed cylinder.
PREPARATION:
(a) Remove the ECM cover.
(b) Turn the ignition switch ON.
CHECK:
Measure voltage between applicable terminal of the ECM con-
nector and body ground.
OK:
Voltage: 9 – 14 V
Reference: INSPECTION USING OSCILLOSCOPE
INJECTOR SIGNAL WAVEFORM
With the engine idling, measure between terminals #10 ∼ #40 and E01 of the ECM connector.