timing TOYOTA CAMRY 1999 Service Owner's Guide

± DIAGNOSTICSENGINE (1MZ±FE)
DI±291
526 Author: Date:
2 Check for open and short in harness and connector between ECM and camshaft
position sensor (See page IN±31).
NG Repair or replace harness or connector.
OK
3 Inspect sensor installation and tooth of left bank camshaft timing pulley.
NG Tighten the sensor.
Replace left bank camshaft timing pulley.
OK
Check and replace ECM (See page IN±31).

S00251
From BatteryIgnition Coil
Spark Plug
IGC1
IGC2
IGC3
GND TA C IGT1
IGT2
IGT3
IGF
To Tachometer ECM G
NE
Camshaft
Position
Sensor
Crankshaft
Position
Sensor
Various
SensorNo.2 Cylinder
No.1 Cylinder
No.4 Cylinder
No.3 Cylinder
No.6 Cylinder
No.5 Cylinder
± DIAGNOSTICSENGINE (1MZ±FE)
DI±351
586 Author: Date:
DTC P1300 Igniter Circuit Malfunction
CIRCUIT DESCRIPTION
A DIS (Direct Ignition System) has been adopted. The DIS improves the ignition timing accuracy, reduces
high±voltage loss, and enhances the overall reliability of the ignition system by eliminating the distributor.
The DIS is a 2±cylinder simultaneous ignition system which ignites 2 cylinders simultaneously with one igni-
tion coil. In the 2±cylinder simultaneous ignition system, each of the 2 spark plugs is connected to the end
of the secondary winding. High voltage generated in the secondary winding is applied directly to the spark
plugs. The sparks of the 2 spark plugs pass simultaneously from the center electrode to the ground elec-
trode.
The ECM determines ignition timing and outputs the ignition signals (IGT) for each cylinder. Based on IGT
signals, the igniter controls the primary ignition signals (IGC) for all ignition coils. At the same time, the igniter
also sends an ignition confirmation signal (IGF) as a fail±safe measure to the ECM.
DTC No.DTC Detecting ConditionTrouble Area
P1300
Condition (a) is repeated 3 times consecutively during 6
consecutively IGT signals while engine is running
(a) IGF signal is not input to ECM for 2 or more ignitions
Open or short in IGF or IGT circuit from igniter to ECM

Igniter

ECM
DI084±06

Q04869
NC2 Revolution Sensor
D01094
Direct Clutch
Speed Sensor 2V3
1
V3
G R
E99
E94ECM
NC2
+
NC2±4 ~ 6 V
*1: Except California, w/ Engine Immobilizer and / or TRAC
*2: California, w/ Engine Immobilizer and / or TRAC*2 *1
E1114
26 *2 *1
E11
± DIAGNOSTICSAUTOMATIC TRANSAXLE (A541E)
DI±473
708 Author: Date:
DTC P1705 NC2 Revolution Sensor Circuit Malfunction
(Direct Clutch Speed Sensor)
CIRCUIT DESCRIPTION
This sensor detects the rotation speed of the direct clutch drum.
By comparing the direct clutch speed signal and the vehicle
speed sensor signal, the ECM detects the shift timing of the
gears and appropriately controls the engine torque and hydrau-
lic pressure in response to various conditions, thus performing
smooth gear shifting.
DTC No.DTC Detecting ConditionTrouble Area
P1705
The ECM detects conditions (a), (b), (c), (d), (e) and (f) conti-
nuity for 4 sec or more.
(2 trip detection logic)
(a) Vehicle speed : 32 km/h (20 mph) or more
(b) 3rd or 4th gear
(c) NC2 < 300 rpm
(d) Park/neutral position switch: OFF
(e) Solenoid valves and vehicle speed sensor are normal
(f) L position: OFF

Open or short in direct clutch speed sensor circuit

Direct clutch speed sensor

ECM
WIRING DIAGRAM
DI02P±02

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

A07370S05309A07664
E1 TE1
SST
DLC1
A09429
DI±10
± DIAGNOSTICSENGINE
6 Check ignition timing.
PREPARATION:
(a) Warm up the engine to normal operating temperature.
(b) Shift the transmission into the N position.
(c) Keep the engine speed at idle.
(d) Using SST, connect terminals TE1 and E1 of the DLC1.
SST 09843±18020
(e) Using a timing light, connect the tester to the No.1 high±
tension cord.
CHECK:
Check the ignition timing.
OK:
Ignition timing: 10° BTDC at idle
NG Proceed to page IG±1 and continue to trouble-
shoot.
OK
Proceed to problem symptoms table on page
DI±21.
7 Check fuel shutoff valve for fuel tank.
PREPARATION:
(a) Be sure that enough fuel is in the tank.
(b) Connect the TOYOTA hand±held tester to the DLC3.
(c) Turn the ignition switch ON and push TOYOTA hand±held
tester main switch ON.
(d) Use the ACTIVE TEST mode to operate the fuel shutoff
valve for the fuel tank.
(e) Please refer to the TOYOTA hand±held tester operator's
manual for further details.
(f) If you have no TOYOTA hand±held tester, Connect be-
tween terminal FC of the ECM connector and body
ground.
CHECK:
Check the operating sound of the fuel shutoff valve for the fuel
tank when it is operated.

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 %

± DIAGNOSTICSENGINE
DI±15
P0172
(DI±49)System too Rich (Fuel Trim)

Injector leak, blockage

Manifold absolute pressure sensor

Engine coolant temp. sensor

Ignition system

Fuel shutoff valve for delivery pipe

Gas leakage on exhaust system

Open or short in A/F sensor (bank 1 sensor 1) circuit

A/F sensor (bank 1 sensor 1)

ECM

P0180
(DI±54)Fuel Temperature Sensor ºAº
Circuit Malfunction

Open or short in fuel temperature sensor circuit for delivery
pipe

Fuel temperature sensor for delivery pipe

ECM

P0190
(DI±56)Fuel Rail Pressure Sensor Cir-
cuit Malfunction
Open or short in fuel pressure sensor circuit for delivery pipe

Fuel pressure sensor for delivery pipe

ECM

P0335
(DI±59)Crankshaft Position Sensor ºAº
Circuit Malfunction

Open or short in crankshaft position sensor circuit

Crankshaft position sensor

Crankshaft timing pulley

ECM

P0340
(DI±61)Camshaft Position Sensor Circuit
Malfunction

Open or short in camshaft position sensor circuit

Camshaft position sensor

Camshaft timing pulley

ECM

P0400
(DI±63)Exhaust Gas Recirculation Flow
Malfunction

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

P0500
(DI±69)Vehicle Speed Sensor Malfunc-
tion

Combination meter

Open or short in vehicle speed sensor circuit

Vehicle speed sensor

ECM

P0505
(DI±72)Idle Control System Malfunction

Open or short in IAC valve circuit

IAC valve is stuck or closed

Open or short in A/C switch circuit

Air induction system

ECM

*: MIL lights up
2. MANUFACTURER CONTROLLED
DTC No.
(See Page)Detection ItemTrouble AreaMIL*Memory
P1130
(DI±79)A/F Sensor Circuit Range/Perfor-
mance Malfunction (Bank 1 Sen-
sor 1)

Open or short in A/F sensor circuit

A/F sensor

Air induction system

EGR system

Fuel pressure

Injector

ECM

P1135
(DI±84)A/F Sensor Heater Circuit Mal-
function (Bank 1 Sensor 1)
Open or short in heater circuit of A/F sensor

A/F sensor heater

ECM


DI±16
± DIAGNOSTICSENGINE
P1190
(DI±86)
Fuel Pressure Regulator Mal-
function

Open or short in fuel shutoff valve circuit for fuel tank

Fuel shutoff valve for fuel tank

Open or short in fuel shutoff valve circuit for fuel pressure reg-
ulator

Fuel shutoff valve for fuel pressure regulator

Fuel pressure regulator

Open or short in fuel shutoff valve circuit for fuel delivery pipe

Fuel shutoff valve for fuel delivery pipe

ECM

P1240
(DI±95)Fuel Fuel Shutoff Valve Circuit
for Delivery Pipe Malfunction
Open or short in fuel shutoff valve circuit for fuel delivery pipe

Fuel shutoff valve for fuel delivery pipe

ECM
±
P1245
(DI±98)Fuel Fuel Shutoff Valve Circuit
for Pressure Regulator Malfunc-
tion
Open or short in fuel shutoff valve circuit for fuel pressure reg-
ulator

Fuel shutoff valve for fuel pressure regulator

ECM
±
P1300
(DI±102)Igniter Circuit Malfunction (No.1)

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

P1310
(DI±102)Igniter Circuit Malfunction (No.2)

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

P1335
(DI±107)Crankshaft Position Sensor Cir-
cuit Malfunction (During engine
running)
Open short in crankshaft position sensor circuit

Crankshaft position sensor

Crankshaft timing pulley

ECM
±
P1520
(DI±108)Stop Light Switch Signal Mal-
function
Short in stop light switch signal circuit

Stop light switch

ECM

P1600
(DI±110)ECM BATT Malfunction
Open in back up power source circuit

ECM
P1780
(DI±112)Park/Neutral Position Switch
Malfunction
Short in park/neutral position switch circuit

Park/neutral position switch

ECM

*:  ... MIL lights up. ± ... MIL does not light up.

A09394
ECM
G
NE+
NE±
E1 E6
E6
E65
4
17 B±W
L
B±R
L BR Camshaft Position Sensor
Crankshaft Position Sensor1
2
1
2B±R
± DIAGNOSTICSENGINE
DI±59
DTC P0335 Crankshaft Position Sensor ºAº Circuit Mal-
function
CIRCUIT DESCRIPTION
Crankshaft position sensor (NE signal) consists of a magnet, iron and pickup coil.
The NE signal plate has 34 teeth and is installed on the crankshaft timing pulley. The NE signal sensor gener-
ates 34 signals at every engine revolution. The ECM detects the standard crankshaft angle based on the
G signal, and the actual crankshaft angle and the engine speed by the NE signal.
DTC No.DTC Detecting ConditionTrouble Area
P0335
No crankshaft position sensor signal to ECM during cranking
(2 trip detection logic)
Open or short in crankshaft position sensor circuit

Crankshaft position sensor
P0335No crankshaft position sensor signal to ECM with engine
speed 600 rpm or more (2 trip detection logic)

Crankshaft osition sensor

Crankshaft timing pulley

ECM
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:

Perform troubleshooting of DTC 335 first. If no trouble is found, troubleshoot the following mechanical
system.

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.
DI013±12

A01991A01992A02359
G and NE Signal Waveforms
5 V/
Division
5 V/
Division G
NE
G
NE20 msec./Division (Idling)
10 msec./Division (Idling)
DI±60
± DIAGNOSTICSENGINE
1 Check resistance of crankshaft position sensor (See Pub. No. RM654U, page
IG±1).
Reference: INSPECTION USING OSCILLOSCOPE
During cranking or idling, check the waveform between termi-
nals G and G±, and NE and NE± of the ECM connector.
HINT:
The correct waveforms are as shown.
NG Replace crankshaft position sensor.
OK
2 Check for open and short in harness and connector between ECM and crank-
shaft position sensor (See page IN±29).
NG Repair or replace harness or connector.
OK
3 Inspect sensor installation (See Pub. No. RM654U, page IG±2) and teeth of crank-
shaft timing pulley (See Pub. No. RM654U, page EM±17).
NG Tighten sensor. Replace crankshaft timing
pulley.
OK
Check and replace ECM (See page IN±29).