check engine TOYOTA CAMRY 2000 Service Repair Manual

(1) Shift transmission into ªNº position or neutral.
(2) Warm up engine at normal operating temperature.
(3) Keep the engine speed at idle.
(4) Using SST, connect terminals TE1 and E1 of
data link connector 1.
SST 09843±18020
(5) Using a timing light, connect the tester to
No. 1 high±tension cord.(1) Shift transmission into ªNº position or neutral.
(2) Warm up engine at normal operating temperature.
(3) Switched off all accessories.
(4) Switched off air conditioning.
(5) Connect tachometer test probe to terminal
IG (±) of data link connector 1, and set the
tachometer to the 4±cylinder range.
wNEVER allow tachometer test probe to touch
ground as it could result in damage to igniter
and/or ignition coil.
wAs some tachometers are not compatible
with this ignition system, we recommended
that you confirm compatibility of your unit
before use.
Proceed to matrix chart of problem symptoms
on page EG1±327.
Proceed to page IG±19, 38* and continue
to troubleshoot.
Proceed to matrix chart of problem
symptoms on page EG1±327.
*Except California specification vehicles. Check ignition timing.
Check idle speed.
Check idle speed.
Idle speed: 700 ~ 800 rpm
Check ignition timing.
Ignition timing: 10
BTDC at idle
± 5S±FE ENGINEBASIC INSPECTIONEG1±311

(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

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 distributor in the Engine Control System contains 3 pickup coils.
The G signals inform the ECM of the standard crankshaft position.
The NE signals inform the ECM of the crankshaft position and the engine speed.
wDuring cranking or idling, check waveforms
between terminals G (+) and G (±),
NE (+) and NE (±) of engine control module.
HINT: The correct waveforms appear as shown
in the illustration on the left.
wOpen or short in NE, G circuit
wDistributor
wOpen or short in STA circuit
wECM No G signal to ECM for 3 sec. or more with
engine speed between 600 rpm and 4,000 rpm. No N E signal to ECM with 2 sec. or more after
cranking.
CIRCUIT INSPECTION
INSPECTION USING OSCILLOSCOPE
Diagnostic Trouble Code Detecting Condition
Reference
Trouble Area
DTC 12 G NE Signal Circuit (No.1) (Exc. California spec.)
DTC No.
± 5S±FE ENGINECIRCUIT INSPECTIONEG1±336

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

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

*: Only for California specification vehicles.
CIRCUIT DESCRIPTION
Refer to G, NE signal circuit (No. 1) on page EG1±336, 339.
No G signal to ECM while N E signal is input 4
times to ECM when engine speed is between
500 rpm and 4,000 rpm.
* NE signal does not pulse 12 times to ECM
during the interval between G1 and G2 pulses.* No NE signal to ECM for 0.1 sec. or more at
1,000 rpm or more.No NE signal to ECM for 0.3 sec. or more at
1,500 rpm or more.
wOpen or short in NE circuit
wDistributor
wECM Diagnostic Trouble Code Detecting ConditionTrouble Area
DTC 13 G NE Signal Circuit (No.2)
DTC No.
DIAGNOSIS
This code indicates that a momentary interruption of the G, N E signal from the distributor to the
ECM has occurred, but that it is returned to normal. Note that although this problem may not nec-
essarily appear at the time of inspection, it cannot be ignored because this diagnostic trouble code
is output, indicating that there is or was a malfunction in the G, NE signal circuit; this ªmalfunctionº
is usually a loose connector.
The distributor connector and the N E terminal of the ECM connector must therefore be checked
for the following:
1. Loose connectors
2. Dirty connector terminals
3. Loose connector terminals
± 5S±FE ENGINECIRCUIT INSPECTIONEG1±343