1999 TOYOTA CAMRY turn signal

FI3605
ON
OFFFlashing
0.13 Second
± DIAGNOSTICSENGINE
DI±7
(3) Prepare the TOYOTA hand±held tester.
(4) Connect the TOYOTA hand±held tester to the
DLC3 under the instrument panel lower pad.
(5) Turn the ignition switch ON and push the TOYOTA
hand±held tester ON.
(6) Switch the TOYOTA hand±held tester from the nor-
mal mode to the check mode. (Check that the MIL
flashes.)
NOTICE:
If the TOYOTA hand±held tester switches the ECM from
normal mode to check mode or vice±versa, or if the igni-
tion switch is turned from ON to ACC or LOCK during check
mode, the DTCs and freezed frame data will be erased.
(7) Start the engine. (The MIL goes out after the engine
start.)
(8) Simulate the conditions of the malfunction de-
scribed by the customer.
NOTICE:
Leave the ignition switch ON until you have checked the
DTC, etc.
(9) After simulating the malfunction conditions, use the
TOYOTA hand±held tester diagnosis selector to
check the DTCs and freezed frame data, etc.
HINT:
Take care not to turn the ignition switch OFF. Turning the ignition
switch OFF switches the diagnosis system from check mode to
normal mode. So all DTCs, etc. are erased.
(10) After checking the DTC, inspect the applicable cir-
cuit.
4. FAIL±SAFE CHART
If any of the following codes is recorded, the ECM enters fail±safe mode.
DTC No.Fail±Safe OperationFail±Safe Deactivation Conditions
P0105Ignition timing fixed at 5° BTDCReturned to normal condition
P0110Intake air temperature is fixed at 20°C (68°F)Returned to normal condition
P0115Engine coolant temperature is fixed at 80°(176°F)Returned to normal condition
P0120VTA is fixed at 0°The following condition must be repeated at least 2 times con-
secutively VTA 0.1 V and  0.95 V
P0141The heater circuit in witch an abnormality is detected is
turned offIgnition switch OFF
P1135The heater circuit in which an abnormality is detected is
turned offIgnition switch OFF
P1300
P1310Fuel cutIGF signal is detected for 2 consecutive ignitions

DI±12
± DIAGNOSTICSENGINE
SHORT FT #1
Short±term Fuel Trim Bank 10 ± 20 %
LONG FT #1Long±term Fuel Trim Bank 10 ± 20 %
ENGINE SPDEngine SpeedIdling: 650 ± 750 rpm
VEHICLE SPDVehicle SpeedVehicle Stopped: 0 km/h (0 mph)
IGN ADVANCEIgnition Advance: Ignition Timing of Cylinder No.1Idling: BTDC 0 ± 10°
INTAKE AIRIntake Air Temp. Sensor ValueEquivalent to Ambient Temp.
MAPAbsolute Pressure inside Intake ManifoldIdling: 20 ± 51 kPa
Racing without load (2,500 rpm): 17 ± 48 kPa
THROTTLE POSVoltage Output of Throttle Position Sensor Calcu-
lated as a percentage: 0 V "0 %, 5 V "100 %Throttle Fully Closed: 6 ± 16 %
Throttle Fully Open: 64 ± 98 %
O2S B1 S1Voltage Output of Heated Oxygen Sensor Bank 1
Sensor 1Idling: 0.1 ± 0.9 V (0.56 ± 0.76 V*2)
O2FT B1 S1Heated Oxygen Sensor Fuel Trim Bank 1 Sensor
1 (Same as SHORT FT #1)0 ± 20 %
A/FS B1 S1Voltage Output of A/F SensorIdling: 2.8 ± 3.8 V
A/FFT B1 S1A/F Sensor Fuel Trim (Same as SHORT FT #1)0 ± 20 %
O2S B1 S2Voltage Output of Heated Oxygen Sensor Bank 1
Sensor 2Driving at 50 km/h (31 mph): 0.05 ± 0.95 V
*1: If no conditions are specifically stated for ºldlingº, it means the shift lever is at N or P position, the A/C
switch is OFF and all accessory switches are OFF.
*
2: When you use the OBD II scan tool (excluding TOYOTA hand±held tester).
(b) TOYOTA Enhanced Signals.
TOYOTA hand±held tester displayMeasurement ItemNormal Condition*
MISFIRE RPMEngine RPM for first misfire rangeMisfire 0: 0 rpm
MISFIRE LOADEngine load for first misfire rangeMisfire 0: 0 g/r
INJECTORFuel injection time for cylinder No.1Idling: 2.9 ± 5.1 ms
IAC DUTY RATIOIntake Air Control Valve Duty Ratio
Opening ratio rotary solenoid type IAC valveIdling: 25 ± 62 %
STARTER SIGStarter SignalCranking: ON
CTP SIGClosed Throttle Position SignalThrottle fully closed: ON
A/C SIGA/C Switch SignalA/C ON: ON
PNP SIGPark/Neutral Position Switch SignalP or N position: ON
ELECTCL LOAD SIGElectrical Load SignalDefogger S/W ON: ON
STOP LIGHT SWStop Light Switch SignalStop light switch ON: ON
PS OIL PRESS SWPower Steering Oil Pressure Switch SignalTurn steering wheel: ON
FC IDLFuel Cut Idle: Fuel cut when throttle valve fully
closed, during decelerationFuel cut operating: ON
FC TAUFuel Cut TAU: Fuel cut during very light loadFuel cut operating: ON
CYL#1, CYL#2, CYL#3, CYL#4Abnormal revolution variation for each cylinder0 %
IGNITIONTotal number of ignition for every 1,000 revolu-
tions0 ± 2,000
EGR SYSTEMEGR system operating conditionIdling: OFF
FUEL PUMPFuel Pump SignalIdling: ON
A/C CUT SIGA/C Cut SignalA/C S/W OFF: ON
A/C MAG CLUTCHA/C Switch SignalA/C ON: ON
EVAP (PURGE) VSVEVAP VSV SignalVSV operating: Avove 30 %

P25430
ECM
Throttle Body
EGR
Vacuum
Modulator EGR Valve
VSV
Exhaust Gas Throttle
Valve
u
± DIAGNOSTICSENGINE
DI±63
DTC P0400 Exhaust Gas Recirculation Flow Malfunction
CIRCUIT DESCRIPTION
The EGR system recirculates exhaust gas, which is controlled to the proper quantity to suit the driving condi-
tions, into the intake air mixture to slow down combustion, reduce the combustion temperature and reduce
NOx emissions. The amount of EGR is regulated by the EGR vacuum modulator according to the engine
load.
If even one of the following conditions is fulfilled, the VSV is
turned ON by a signal from the ECM.
This results in atmospheric air acting on the EGR valve, closing
the EGR valve and shutting off the exhaust gas (EGR cut±off).
Under the following conditions, EGR is cut to maintain driveabil-
ity.

Before engine is warmed up.

During deceleration (throttle valve closed).

Light engine load (amount of intake air very small).

Engine idling.

Engine speed over 4,400 rpm.

High engine load (amount of intake air very large).
DTC No.DTC Detecting ConditionTrouble Area
P0400
After engine is warmed up, intake manifold absolute pressure
is larger than value calculated by ECM while EGR system is
ON (2 trip detection logic)

Vacuum or EGR hose is connected to wrong post

Open or short in VSV circuit for EGR

VSV for EGR

EGR system

EGR vacuum modulator

EGR valve

Manifold absolute pressure sensor

ECM
DI64W±01

± DIAGNOSTICSENGINE
DI±73
INSPECTION PROCEDURE
HINT:
Read freeze frame data using TOYOTA hand±held tester or OBD II scan tool. Because freeze frame records
the engine conditions when the malfunction is detected. When troubleshooting it is useful for determining
whether the vehicle was running or stopped, the engine was warmed up or not, the air±fuel ratio was lean
or rich, etc. at the time of the malfunction.
TOYOTA hand±held tester:
1 Check idle speed.
PREPARATION:
(a) Warm up the engine to normal operating temperature.
(b) Switch off all the accessories.
(c) Switch off the A/C.
(d) Shift the transmission into the N or neutral position.
(e) Remove the fuse cover on the instrument panel.
(f) Connect the TOYOTA hand±held tester to the DLC3 on the vehicle and select the ACTIVE TEST
mode.
CHECK:
Check the difference of engine speed between the ones, less than 5 sec. and more than 5 sec. after switch-
ing the TE1 from OFF to ON by the TOYOTA hand±held tester.
OK:
Difference of engine speed: More than 100 rpm
OK Go to step 8.
NG
2 Check for IAC duty signal.
PREPARATION:
(a) Remove the fuse cover on the instrument panel.
(b) Connect the TOYOTA hand±held tester to the DLC3 on the vehicle.
(c) Turn the ignition switch ON and push the TOYOTA hand±held tester main switch ON.
CHECK:
Read the IAC duty ratio on the TOYOTA hand±held tester.
OK:
IAC duty ratio: 27 ± 47 %
OK Go to step 3.
NG
Check and replace ECM (See page IN±29).

1 msec. /Division 5 V /Division
GND
A09303BE6653
A09648
ON
RSD
(±) (+)
DI±76
± DIAGNOSTICSENGINE
OK Go to step 8.
NG
2 Check for IAC duty signal.
PREPARATION:
(a) Warm up the engine normal operating temperature.
(b) Connect the oscilloscope between RSD of the ECM con-
nector and body ground.
CHECK:
Check if IAC duty signal is output.
OK:
HINT:
IAC duty ratio changes in response to engine operating condi-
tion.
OK Go to step 6.
NG
3 Check voltage between terminal RSD of ECM and body ground.
PREPARATION:
(a) Remove the lower center finish panel.
(b) Turn the ignition switch ON.
CHECK:
Measure the voltage between terminal RSD of the ECM con-
nector and body ground.
OK:
Voltage: 9 ± 14 V
OK Check and replace ECM (See page IN±29).

DI±102
± DIAGNOSTICSENGINE
DTC P1300 Igniter Circuit Malfunction (No.1)
DTC P1310 Igniter Circuit Malfunction (No.2)
CIRCUIT DESCRIPTION
The ECM determines the ignition timing, turns on Tr1 at a predetermined angle (°CA) before the desired
ignition timing and outputs and ignition signal (IGT) 1 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 Tr2 turns on.
When it reaches the ignition timing, the ECM turns Tr1 off and outputs the IGT signal O.
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, the counter electromotive force is 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 IGF signal is not input to the ECM.
DTC No.DTC Detecting ConditionTrouble Area
P1300No IGF signal to ECM for 4 consecutive IGT1 signals during
engine running

Ignition system

Open or short in IGF or IGT1 circuit from No.1 ignition coil
with igniter to ECM

No.1 ignition coil with igniter

ECM
P1310No IGF signal to ECM for 4 consecutive IGT2 signals during
engine running

Ignition system

Open or short in IGF or IGT2 circuit from No.2 ignition coil
with igniter to ECM

No.2 ignition coil with igniter

ECM
HINT:
No.1 ignition coil with igniter is for cylinder No.1 and No.4, and No.2 ignition coil is for cylinder No.2 and No.3.
DI01G±07

A09288BE6653A09269
ON
IGF
(±) (+)
A09287BE6653A09268
START
IGT2
IGT1
(±) (+) DI±104
± DIAGNOSTICSENGINE
3 Disconnect ignition coil with igniter connector, and check voltage between ter-
minal IGF of ECM connector and body ground.
PREPARATION:
(a) Disconnect the ignition coil with igniter connector.
(b) Remove the glove compartment (See Pub. No. RM654U,
page SF±64).
(c) Turn the ignition switch ON.
CHECK:
Measure the voltage between terminal IGF of the ECM connec-
tor and body ground.
OK:
Voltage: 4.5 ± 5.5 V
OK Replace ignition coil with igniter.
NG
Check and replace ECM (See page IN±29).
4 Check for open and short in harness and connector in IGT1 and IGT2 signal cir-
cuits between ECM and ignition coil with igniter (See page IN±29).
NG Repair or replace harness or connector.
OK
5 Check voltage between terminals IGT1, IGT2 of ECM connector and body
ground.
PREPARATION:
Remove the glove compartment (See Pub. No. RM654U, page
SF±64).
CHECK:
Measure the voltage between terminal IGT1, IGT2 of the ECM
connector and body ground when the engine is cranked.
OK:
Voltage: More than 0.1 V and less than 4.5 V

FI6680
IGT and IGF Signal Waveforms
10 msec./Division (Idling) IGT
0 V
IGF
0 V2 V/
Division
A09287BE6653A09268
START
IGT2
IGT1
(±) (+)
BE6653A01761A01861
ON
START
1 (±) (+)
± DIAGNOSTICSENGINE
DI±105
Reference: INSPECTION USING OSCILLOSCOPE
During idling, check the waveform between terminals IGT1 and
E1, IGT2 and E1, and IGF and E1 of the ECM connector.
HINT:
The correct waveforms are as shown.
NG Check and replace ECM (See page IN±29).
NG
6 Disconnect ignition coil with igniter connector, and check voltage between ter-
minals IGT1, IGT2 of ECM connector and body ground.
PREPARATION:
(a) Disconnect the ignition coil with igniter connector.
(b) Remove the glove compartment (See Pub. No. RM654U,
page SF±64).
CHECK:
Measure the voltage between terminals IGT1, IGT2 of the ECM
connector and body ground when the engine is cranked.
OK:
Voltage: More than 0.1 V and less than 5 V
OK Replace ignition coil with igniter.
NG
7 Check ignition coil with igniter power source circuit.
PREPARATION:
Disconnect the ignition coil with igniter connector.
CHECK:
Measure the voltage between terminal 1 of the ignition coil with
the igniter connector and body ground when the ignition switch
is turned to ON and STA position.
OK:
Voltage: 9 ± 14 V
NG Repair ignition coil with igniter power source
circuit.
OK