2000 TOYOTA CAMRY engine oil

Check for open and short in harness and
connector between ECM and distributor.Check resistance of each pickup coils in
distributor.
Repair or replace harness or connector.
DIAGNOSTIC CHART
WIRING DIAGRAM
Replace distributor housing.
Replace distributor housing.
Check and replace ECM. Check air gap.
± 5S±FE ENGINECIRCUIT INSPECTIONEG1±337

Remove distributor cap and rotor.
Using a thickness gauge, measure the air gap be±
tween the signal rotor and pickup coil projection.
Air gap: 0.2 ± 0.4 mm (0.008 ± 0.006 in.)
Check for open and short in harness and connector between
engine control module and distributor (See page IN±31).
Disconnect distributor connector.
Measure resistance between each terminal
shown in table below.
ªColdº is from ±10
C (14
F) to 50
C (122
F) and
ªHotº is from 50
C (122
F) to 100
C (212
F).
Check resistance of each pickup coils in distributor.
Check and replace engine control module.Repair or replace harness or connector.
INSPECTION PROCEDURE
Replace distributor housing.Replace distributor housing.
NE Pickup Coil
(NE (+) ± NE (±) )
Check air gap.
G Pickup Coil
(G1 ±G (±))
475 ~ 650
370 ~ 550
240 ~ 325
185 ~ 275
Resistance
ColdCold
Hot
Hot
± 5S±FE ENGINECIRCUIT INSPECTIONEG1±338

CIRCUIT DESCRIPTION
The distributor in the Engine Control System contains 3 pick±up coils (G1, G2 and NE).
The G1, G2 signals inform the ECM of the standard crankshaft angle.
The NE signals inform the ECM of the crankshaft angle and the engine speed.
wOpen or short in NE, G circuit.
wDistributor
wOpen or short in STA circuit.
wECM No NE or G1 and G2 signal to ECM for
2 sec. or more after cranking.Diagnostic Trouble Code Detecting Condition
Open in G (±) circuit.Trouble Area
DTC 12 G NE Signal Circuit (No.1) (Only for California spec.)
DTC No.
± 5S±FE ENGINECIRCUIT INSPECTIONEG1±339

Check for open and short in harness and
connector between ECM and distributor. Check resistance of each pickup coils in
distributor.
Repair or replace harness or connector.
DIAGNOSTIC CHART
WIRING DIAGRAM
Check and replace ECM.Replace distributor. Replace distributor.
Check air gap.
± 5S±FE ENGINECIRCUIT INSPECTIONEG1±340

wDuring cranking or idling, check waveforms be±
tween terminals G1, G2, NE and G O of engine
control module.
HINT: The correct waveforms appear as shown in the
illustration on the left.
Disconnect distributor connector.
Measure resistance between each terminal
shown in table below.
Check for open and short in harness and connector between
engine control module and distributor (See page IN±31).
ªColdº is from ±10
C (14
F) to 50
C (122
F) and ªHotº is
from 50
C (122
F) to 100
C (212
F).
Check resistance of each pickup coils in distributor.
INSPECTION USING OSCILLOSCOPE
Repair or replace harness or connector.
INSPECTION PROCEDURE
Replace distributor.
Reference
Resistance
± 5S±FE ENGINECIRCUIT INSPECTIONEG1±341

Remove distributor cap & rotor.
Using SST (G1 and G2 pickups) and a thickness
gauge (NE pickup), measure the air gap between
the signal rotor and pickup coil projection.
SST 09240±00020 for G1 and G2 pickups
Air gap: 0.2±0.5 mm (0.008±0.020 in.)
Check and replace engine control module.Replace distributor housing assembly.
Check air gap.
± 5S±FE ENGINECIRCUIT INSPECTIONEG1±342

CIRCUIT DESCRIPTION
The ECM determines the ignition timing, turns on Tr, at a predetermined angle ('*CA) before the
desired ignition timing and outputs an ignition signal (IGT) ª1º to the igniter.
Since the width of the IGT signal is constant, the dwell angle control circuit in the igniter determines
the time the control circuit starts primary current flow to the ignition coil based on the engine rpm and
ignition timing one revolution ago, that is, the time the Tr
2 turns on.
When it reaches the ignition timing, the ECM turns Tr, off and outputs the IGT signal ªOº.
This turns Tr2 off, interrupting the primary current flow and generating a high voltage in the secondary
coil which causes the spark plug to spark. Also, by the counter electromotive force generated when
the primary current is interrupted, the igniter sends an ignition confirmation signal (IGF) to the ECM.
The ECM stops fuel injection as a fail safe function when the lG F signal is not input to the ECM.
wOpen or short in IG F or IGT circuit from
igniter to ECM.
wIgniter
wECM No IGF signal to ECM for 4 (8*2) consecutive
IGT signals. Diagnostic Trouble Code Detecting Condition
WIRING DIAGRAM
Trouble Area
DTC 14 Ignition Signal Circuit
DTC No.
± 5S±FE ENGINECIRCUIT INSPECTIONEG1±344

Check for open and short in IGF signal circuit
between igniter and ECM.
Check for open and short in IGT signal circuit
between igniter and ECM. Check voltage of terminal IGT (Disconnect
igniter connector).Check for open and short in primary coil
circuit.Check and repair igniter power
source circuit.Repair or replace harness or
connector.
Repair or replace harness or
connector.
Repair or replace harness or
connector. Check voltage of igniter power source.
DIAGNOSTIC CHART
Check voltage of terminal I G F.
Check voltage of terminal IGT.
Check and replace ECM.Check and replace ECM.
Replace ignition coil.
Check ignition coil.Check for spark.
Replace igniter.
Replace igniter.
Replace igniter.
± 5S±FE ENGINECIRCUIT INSPECTIONEG1±345