2000 TOYOTA CAMRY ignition

(1) Be sure that fuel is enough in tank.
(2) Turn ignition switch on.
(3) Using SST, connect terminals FP and + B of
data link connector 1.
SST 09843±18020
Check for fuel pressure in the return hose when it
is pinched off.
Disconnect the high±tension cord from the distributor and, hold the end about 12.5 mm (1/2º)
from the ground, see if spark occurs while the engine is being cranked.
To prevent excessive fuel injected from the injectors during this test, don't crank the engine for
more than 1±2 seconds at a time.Never make a mistake with the terminal con±
nection position as this will cause a malfunc±
tion.
Proceed to matrix chart of problem symptoms
on page EG1±327.
Proceed to page EG1±178 and continue
to troubleshoot.
Proceed to page IG±6, 26* and continue
to troubleshoot.
* : Except California specification vehicles.
Check fuel pressure.
Check for spark.
At this time, you will hear fuel return noise.
± 5S±FE ENGINEBASIC INSPECTIONEG1±312

REFERENCE VALUE OF ECM DATA
*1: If the engine coolant temp, sensor circuit is open or shorted, the ECM assumes an engine coolant temp, value of 80
C (176
F).
*2: When feedback control is forbidden, 0 V is displayed,
*3: A/T only.Closed throttle position
Wide open throttle
From closed throttle position to wide open throttle
When shifting from ªPº or ªNº position into a position
other than ªPº or ªNºEngine idling at normal operating temp.
increase engine loadEngine cold to hot
Engine idling at normal operating temp.
RPM stable at 2,500 rpm with normal operating temp.
PRM stable at 2,500 rpm with normal operating temp.RPM kept stable (Comparison with tachometer)
During driving (Comparison with speedometer)Below 5

Above 70

Gradually increases Approx. 180 ~ 280 mm Hg
Gradually increases
Engine idling at normal operating temp.Engine idling at normal operating temp.Gradually decreases
Approx. 2 ~ 5 msecs
REFERENCE VALUE
Engine at normal operating temp. 75 ± 95
C (185 ± 203
F) *1
Closed throttle position
RICH LEAN is repeated Increase engine speed
No large differences Inspection condition
Gradually increases
No great changes
2.50+ 1.25 V *2
During cranking
PNP SIGNAL *3A/C switch ON ENGINE SPEEDReference value
TARGET A/F LVEHICLE SPD
A/F FB LEFT
A/C SIGNALSTA SIGNAL
CTP SIGNAL30~60% INJECTOR
THROTTLEIAC DUTYIGNITION
G EAR MAPItem
OxLECT
HINT: ECM data can be monitored by TOYOTA hand±held
tester.
1. Hook up the TOYOTA hand±held tester to the DLC2.
2. Monitor ECM data by following the prompts on the tester
screen.
Please refer to the TOYOTA hand±held tester operator's
manual for further details.
± 5S±FE ENGINEREFERENCE VALUE OF ECM DATAEG1±326

MATRIX CHART OF PROBLEM SYMPTOMS
When the malfunction code is not confirmed in the diagnostic trouble code check and the problem still can
not be confirmed in the basic inspection, then proceed to this step and perform troubleshooting according
to the numbered order given in the table below.
*: Except California specification vehicles.
Park/Neutral position switch circuitManifold absolute pressure sensor circuit
VSV circuit for fuel pressure control
Ignition signal circuit (Spark test)
After acceleration pedal depressed
After acceleration pedal released
Switch condition signal circuit
Muffler explosion (after fire)No initial combustion
Back up power source circuit
Hesitation/Poor accelerationNo complete combustion
ECM power source circuit
Starter and Starter relay
Engine control module
High engine idle speed
Low engine idle speedUnder normal condition
During A/C operationEngine does not crank
A/C cut control circuit Starter signal circuit
Soon after starting
Fuel system circuit
When N to D shiftIncorrect first idle
Poor
Driveability
IAC valve circuit Difficult to
start
Injector circuit
Rough idling
Does not
start
Compression
Suspect area
Cold engine
Ignition coil Engine Stall
EG R system
Hot engine
Poor Idling
Spark plug
A/T faultylG±10,30*
IG±11,30 Distributor
Symptom
ST±19,21
See page
IG±8,28* IG±6,26*
Hunting
Surging
EG1±400
EG1±410 EG1±390
EG1±403
EG1±408
EG1±415
EG1±419EG1±383EG1±372
EG1±428EG1±396
EG1 ±424
AX1±68 EG1±23
IN±36
± 5S±FE ENGINEMATRIX CHART OF PROBLEM SYMPTOMSEG1±327

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

Disconnect the high±tension cord from the distributor, hold its end about 12.5 mm (11 /2º)
from the ground, see if spark occurs while the engine is being cranked.
Spark should be generated.
To prevent excessive fuel injected from the injectors during this check, don't crank the
engine for more than 1 ± 2 seconds at a time.
(1) Disconnect igniter connector.
(2) Remove glove compartment.
(See page EG1±234).
(3) Turn ignition switch on.
Measure voltage between terminal IGF of engine
control module connector and body ground.
Voltage: 4.5 ~ 5.5 V
Check for open and short in harness and connector in IGF signal
circuit between engine control module and igniter (See page IN±31).
Disconnect igniter connector and check voltage between terminal
IGF of engine control module connector and body ground.
Check and replace engine control module.Repair or replace harness or connector.
INSPECTION PROCEDURE
Check for spark.
Replace igniter.
Go to step
± 5S±FE ENGINECIRCUIT INSPECTIONEG1±346

Disconnect igniter connector.
Measure voltage between terminal 3 of igniter
connector and body ground, when ignition
switch is turned to ªONº and ªSTAº position.
Voltage: 9 ~ 14 V
Check for open and short in harness and connector between ignition
switch and ignition coil, ignition coil and igniter (See page IN±31). Check voltage between terminal 3 of igniter connector and body
ground.
Check and repair igniter power source
circuit.
Repair or replace harness or connector.
± 5S±FE ENGINECIRCUIT INSPECTIONEG1±348

For California spec.
(1) Disconnect ignition coil connector.
(2) Disconnect high±tension cord from ignition
coil.
Exc. California spec.
(1) Disconnect distributor connectors.
(2) Remove distributor cap and rotor.
(3) Remove ignition coil dust cover.
(1) Check primary coil.
Measure resistance between the positive
(+) and negative (±) terminals.
(2) Check secondary coil.
Measure resistance between the positive
(+) and high±tension terminals.
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 ignition coil.
Replace ignition coil.
Replace igniter.
Secondary
CoilPrimary
CoilResistanceCold
Cold
HotHot
± 5S±FE ENGINECIRCUIT INSPECTIONEG1±349