OBD port TOYOTA CAMRY 1999 Service Owner's Manual

A00309
ECM Fuel Pressure Sensor
for Delivery Pipe
1PCNG2VC
E2 Y
G±BE5
E7
E5 3
25 V
E1 1
5
9
BR DI±56
± DIAGNOSTICSENGINE
DTC P0190 Fuel Rail Pressure Circuit Malfunction
CIRCUIT DESCRIPTION
By a built±in sensor unit, the fuel rail pressure sensor detects the intake manifold pressure as a voltage. The
ECM then determines the basic injection duration and basic injection advance angle based on this voltage.
Since the fuel rail pressure sensor does not use the atmospheric pressure as a criterion, but senses the ab-
solute pressure inside the intake manifold (the pressure in proportion to the present absolute vacuum 0),
it is not influenced by fluctuations in the atmospheric pressure due to high altitude and other factors. This
permits it to control the air±fuel ratio at the proper lever under all conditions.
DTC No.DTC Detecting ConditionTrouble Area
P0190Open or short in fuel pressure sensor circuit for delivery pipe

Open or short in fuel pressure sensor circuit for delivery pipe

Fuel pressure sensor for delivery pipe

ECM
HINT:
After confirming DTC P0190, use the OBD II scan tool or TOYOTA hand±held tester to confirm the fuel rail
pressure from the CURRENT DATA.
WIRING DIAGRAM
DI64V±01

A00407
Air
Air FilterAir
E
System: OFFSystem: ON GG E
± DIAGNOSTICSENGINE
DI±65
(b) There is a malfunction in the system.
If there is a malfunction in the system, the MIL will light up after steps (2) to (5) above are done. (2 trip
detection logic)
INSPECTION PROCEDURE
HINT:

If DTCs P0105, P0106 and P0400 are output simultaneously, perform troubleshooting of DTC P0105
first.

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 connection of vacuum hose and EGR hose (See Pub. No. RM654U, page
EC±12).
NG Repair or replace.
OK
2 Check VSV for EGR.
PREPARATION:
(a) Connect the TOYOTA hand±held tester to the DLC3.
(b) Turn the ignition switch ON and push the TOYOTA hand±
held tester main switch ON.
(c) Select the ACTIVE TEST mode on the TOYOTA hand±
held tester.
CHECK:
Check the operation of the VSV when it is operated by the TOY-
OTA hand±held tester.
OK:
EGR system is OFF:
Air from port E is flowing out through the air filter.
EGR system is ON:
Air from port E is flowing out port G.
OK Go to step 4.
NG
3 Check operation of VSV for EGR (See Pub. No. RM654U, page SF±43).

A09281
A09423
ON
E6 Connector
EGR
OFF
Air
FilterON
Air
E
G E
VSV is ON
VSV is OFF Air
G
± DIAGNOSTICSENGINE
DI±67
Check and replace ECM (See page IN±29).
OBD II scan tool (excluding TOYOTA hand±held tester):
1 Check connection of vacuum hose and EGR hose (See Pub. No. RM654U, page
EC±12).
NG Repair or replace.
OK
2 Check VSV for EGR.
PREPARATION:
(a) Remove the glove compartment (See Pub. No. RM654U,
page SF±64).
(b) Disconnect the E6 connector from the ECM.
(c) Turn the ignition switch ON.
CHECK:
Check the VSV function.
(1) Connect between terminal EGR of the ECM con-
nector and body ground (ON).
(2) Disconnect between terminal EGR of the ECM con-
nector and body ground (ON).
OK:
(1) VSV is ON:
Air from port E is flowing out through the air filter.
(2) VSV is OFF:
Air from port E is flowing out port G.
OK Go to step 4.
NG
3 Check operation of VSV for EGR (See Pub. No. RM654U, page SF±43).
NG Replace VSV for EGR.
OK

DI02U±04
Vehicle Brought to Workshop
Customer Problem Analysis
Check DTC and Freeze Frame Data (Precheck)
Record or Print DTC and Freeze Frame Data P.
DI±133
Clear DTC and Freeze Frame Data P. DI±133
Visual Inspection
Setting the Check Mode Diagnosis P.
DI±133
1
Items insideare titles of pages in this manual, with the
page number indicated in the bottom portion. See the indicated
pages for detailed explanations.
P.
DI±132
Connect an OBD II scan tool or TOYOTA hand±held tester to DLC3.
If the display shows ºUNABLE TO CONNECT TO VEHICLEº when you have connected the
scan tool / TOYOTA hand±held tester, inspect DLC3 P.
DI±133
2
3
4
5
6
Symptom does not occur
Problem Symptom Confirmation8
7Symptom Simulation
P.
IN±19Symptom occurs
DTC CheckP. DI±133OK Code11Preliminary Check
P.
DI±133
DTC Chart
P. DI±145Mechanical System Test
P.
DI±133
Manual Shifting Test
P.
DI±133 OK
OK
Chapter 1
(Electronic)Chapter 2
(On±Vehicle)
P.
DI±148 OK
Chapter 3
(Off±Vehicle)OK Problem Symptoms Table± P. DI±148
Circuit
Inspection
O/D Cancel Signal Check

O/D Main Switch & O/D OFF Indica-
tor Light Circuit Check
NG
Parts Inspection
NG
NGNG
Identification of ProblemRepairConfirmation TestEnd
NG
NG
12
13
14
15
16 17 9
10
P. DI±148P. DI±148
P. DI±151 to DI±171
OK
± DIAGNOSTICSAUTOMATIC TRANSAXLE
DI±131
201 Author: Date:
AUTOMATIC TRANSAXLE
HOW TO PROCEED WITH TROUBLESHOOTING

FI0534
S05335
Hand±held Tester
DLC3
± DIAGNOSTICSAUTOMATIC TRANSAXLE
DI±135
2. INSPECT DIAGNOSIS (NORMAL MODE)
(a) Check the MIL.
(1) The MIL comes on when the ignition switch is turned
ON and the engine is not running.
HINT:
If the MIL does not light up, troubleshoot the combination meter
(See page BE±4).
(2) When the engine is started, the MIL should go off.
If the lamp remains on, the diagnosis system has
detected a malfunction or abnormality in the sys-
tem.
(b) Check the DTC.
NOTICE:
(hand±held tester only): When the diagnostic system is
switched from normal mode to check mode, it erases all
DTCs and freeze frame data recorded in normal mode. So
before switching modes, always check the DTCs and
freeze frame data, and note them down.
(1) Prepare an OBD II scan tool (complying with SAE
J1978) or hand±held tester.
(2) Connect the OBD II scan tool or hand±held tester
to DLC3 at the lower portion of the instrument panel.
(3) Turn the ignition switch ON and turn the OBD II scan
tool or hand±held tester switch ON.
(4) Use the OBD II scan tool or hand±held tester to
check the DTCs and freeze frame data and note
them down (For operating instructions, see the
OBD II scan tool's instruction book).
(5) See page DI±145 to confirm the details of the DTCs.
NOTICE:
When simulating symptoms with an OBD II scan tool (ex-
cluding hand±held tester) to check the DTCs, use normal
mode. For codes on the DTCs chart subject to º2 trip detec-
tion logicº, turn the ignition switch off after the symptoms
have been simulated the 1st time. Then repeat the simula-
tion process again. When the program has DTCs, the DTCs
are recorded in the ECM.

IN±42
± INTRODUCTIONTERMS
42 Author: Date:
HO2SHeated Oxygen SensorHeated Oxygen Sensor (HO2S)
IACIdle Air ControlIdle Speed Control (ISC)
IATIntake Air TemperatureIntake or Inlet Air Temperature
ICMIgnition Control Module±
IFIIndirect Fuel InjectionIndirect Injection (IDL)
IFSInertia Fuel±Shutoff±
ISCIdle Speed Control±
KSKnock SensorKnock Sensor
MAFMass Air FlowAir Flow Meter
MAPManifold Absolute PressureManifold Pressure
Intake Vacuum
MCMixture Control
Electric Bleed Air Control Valve (EBCV)
Mixture Control Valve (MCV)
Electric Air Control Valve (EACV)
MDPManifold Differential Pressure±
MFIMultiport Fuel InjectionElectronic Fuel Injection (EFI)
MILMalfunction Indicator LampCheck Engine Lamp
MSTManifold Surface Temperature±
MVZManifold Vacuum Zone±
NVRAMNon±Volatile Random Access Memory±
O2SOxygen SensorOxygen Sensor, O2 Sensor (O2S)
OBDOn±Board DiagnosticOn±Board Diagnostic System (OBD)
OCOxidation Catalytic ConverterOxidation Catalyst Convert (OC), CCo
OPOpen LoopOpen Loop
PAIRPulsed Secondary Air InjectionAir Suction (AS)
PCMPowertrain Control Module±
PNPPark/Neutral Position±
PROMProgrammable Read Only Memory±
PSPPower Steering Pressure±
PTOXPeriodic Trap OxidizerDiesel Particulate Filter (DPF)
Diesel Particulate Trap (DPT)
RAMRandom Access MemoryRandom Access Memory (RAM)
RMRelay Module±
ROMRead Only MemoryRead Only Memory (ROM)
RPMEngine SpeedEngine Speed
SCSuperchargerSupercharger
SCBSupercharger BypassE±ABV
SFISequential Multiport Fuel InjectionElectronic Fuel Injection (EFI), Sequential Injection
SPLSmoke Puff Limiter±
SRIService Reminder Indicator±
SRTSystem Readiness Test±
STScan Tool±
TBThrottle BodyThrottle Body
TBIThrottle Body Fuel InjectionSingle Point Injection
Central Fuel Injection (Ci)
TCTurbochargerTurbocharger
TCCTorque Converter ClutchTorque Converter

IN±40
± INTRODUCTIONTERMS
HO2S
Heated Oxygen SensorHeated Oxygen Sensor (HO2S)
IACIdle Air ControlIdle Speed Control (ISC)
IATIntake Air TemperatureIntake or Inlet Air Temperature
ICMIgnition Control Module±
IFIIndirect Fuel InjectionIndirect Injection (IDL)
IFSInertia Fuel±Shutoff±
ISCIdle Speed Control±
KSKnock SensorKnock Sensor
MAFMass Air FlowAir Flow Meter
MAPManifold Absolute PressureManifold Pressure
Intake Vacuum
MCMixture Control
Electric Bleed Air Control Valve (EBCV)
Mixture Control Valve (MCV)
Electric Air Control Valve (EACV)
MDPManifold Differential Pressure±
MFIMultiport Fuel InjectionElectronic Fuel Injection (EFI)
MILMalfunction Indicator LampCheck Engine Lamp
MSTManifold Surface Temperature±
MVZManifold Vacuum Zone±
NVRAMNon±Volatile Random Access Memory±
O2SOxygen SensorOxygen Sensor, O2 Sensor (O2S)
OBDOn±Board DiagnosticOn±Board Diagnostic System (OBD)
OCOxidation Catalytic ConverterOxidation Catalyst Convert (OC), CCo
OPOpen LoopOpen Loop
PAIRPulsed Secondary Air InjectionAir Suction (AS)
PCMPowertrain Control Module±
PNPPark/Neutral Position±
PROMProgrammable Read Only Memory±
PSPPower Steering Pressure±
PTOXPeriodic Trap OxidizerDiesel Particulate Filter (DPF)
Diesel Particulate Trap (DPT)
RAMRandom Access MemoryRandom Access Memory (RAM)
RMRelay Module±
ROMRead Only MemoryRead Only Memory (ROM)
RPMEngine SpeedEngine Speed
SCSuperchargerSupercharger
SCBSupercharger BypassE±ABV
SFISequential Multiport Fuel InjectionElectronic Fuel Injection (EFI), Sequential Injection
SPLSmoke Puff Limiter±
SRIService Reminder Indicator±
SRTSystem Readiness Test±
STScan Tool±
TBThrottle BodyThrottle Body
TBIThrottle Body Fuel InjectionSingle Point Injection
Central Fuel Injection (Ci)
TCTurbochargerTurbocharger
TCCTorque Converter ClutchTorque Converter

Toyota Supports ASE CertificationPage 1 of 23
EG003-02Title:
READINESS MONITOR DRIVE PATTERNS
Models:
All '96 ± '02
Technical Service
BULLETIN
March 29, 2002

TSB REVISION NOTICE:
The information updated in this TSB is red
and underlined.
The On±Board Diagnostic (OBDII) system is designed to monitor the performance of
emission±related components and report any detected abnormalities in the form of
Diagnostic Trouble Codes (DTCs). Since the various components need to be monitored
during different driving conditions, the OBDII system is designed to run separate
monitoring programs called Readiness Monitors. Many state Inspection and
Maintenance (I/M) programs require that vehicles complete their Readiness Monitors
prior to beginning an emissions test.
The current status of the Readiness Monitors can be seen by using the Toyota Diagnostic
Tester with version 9.0 software (or newer), or a generic OBDII Scantool.
To view the Readiness Monitor status using the Toyota Diagnostic Tester, select ªMonitor
Statusº from the Enhanced OBDII Menu.
A status of ªcompleteº indicates that the necessary conditions have been met to run the
performance tests for the related Readiness Monitor.
The Readiness Monitor will be reset to ªincompleteº if:

ECU has lost power (battery or fuse).

DTCs have been cleared.

The conditions for running the Readiness Monitor have not been met.
In the event that any Readiness Monitor shows ªincomplete,º follow the appropriate
Readiness Monitor Drive Pattern to change the readiness status to ªcomplete.º
Refer to the Readiness Monitor Drive Pattern Application Table to determine which
drive pattern should be followed.
SECTIONPAGE(S)
Readiness Monitor Drive Pattern Application Tables3±9
Readiness Monitor Drive Patterns
1EGR Monitor (All Except 1FZ±FE Engine)10
2EGR Monitor (For 1FZ±FE Engine)11
3Catalyst Monitor (O2S Type)12
4Catalyst Monitor (AF Sensor Type)13
5EVAP Monitor (Internal Pressure Monitor/Non±Intrusive Type)14±15
6EVAP Monitor (Vacuum Pressure Monitor/Intrusive Type)16±17
7EVAP Monitor (Without Leak Detection)18
8EVAP Monitor (For Prius)19±20
9Oxygen Sensor Monitor (Front and Rear O2S System)21
10Oxygen/AF Sensor Monitor (Front AF Sensor and Rear O2S System)22
11Oxygen/AF Sensor Heater Monitor23

All 1996 ± 2002 model year Toyota vehicles.
OP CODEDESCRIPTIONTIMEOPNT1T2
N/ANot Applicable to Warranty±±±±
ENGINE
Introduction
Contents
Applicable
Vehicles
Warranty
Information

Toyota Supports ASE CertificationPage 1 of 14
EG005-01Title:
EVAP SYSTEM OPERATION
INFORMATION
Models:
All '96 ± '01 Models
Technical Service
BULLETIN
April 27, 2001

This service bulletin provides supplemental information regarding the system design,
operation, and diagnostics of the Early Type (Non±Intrusive) and Late Type (Intrusive)
EVAP Systems found on 1996 model year and later OBD II equipped vehicles.
MODEL199619971998199920002001
AvalonEarlyEarlyEarlyEarlyLateLate
CamryEarly
(A/T only)EarlyEarlyEarlyLateLate
Camry
SolaraN/AN/AN/AEarlyLateLate
CelicaN/AN/AEarlyEarlyLateLate
CorollaN/AN/AEarlyEarlyLateLate
ECHON/AN/AN/AN/ALateLate
MR2N/AN/AN/AN/ALateLate
PriusN/AN/AN/AN/ALateLate
TercelN/AEarlyEarlyEarlyN/AN/A
4RunnerEarlyEarlyEarlyEarlyEarlyLate
Land
CruiserN/AN/AEarlyEarlyEarlyEarly
RAV4EarlyEarlyEarlyEarlyEarlyLate
SequoiaN/AN/AN/AN/AN/ALate
SiennaN/AN/AEarlyEarlyEarlyLate
TacomaEarly
(4WD only)EarlyEarlyEarlyEarlyEarly
TundraN/AN/AN/AN/AEarlyEarly
T100N/AEarlyEarlyN/AN/AN/A
This bulletin is divided into the following sections:
Early Type and Late Type EVAP System Outline
1. Early Type Description Pages 2±4. . . . . . . . . . . . . . . . . . . .
2. Late Type Description Pages 4±6. . . . . . . . . . . . . . . . . . . . .
3. ECHO Late Type Description Page 6. . . . . . . . . . . . . .
4. Late Type System Monitor Sequence Pages 6±9. . . . . .
Diagnostic Tips For Late Type EVAP System Pages 10±14. . . . . . . . . .
OP CODEDESCRIPTIONTIMEOPNT1T2
N/ANot Applicable to Warranty ±±±±
ENGINE
Introduction
Applicable
Vehicles
Contents
Warranty
Information

EVAP SYSTEM OPERATION INFORMATION ± EG005-01 April 27, 2001
Page 11 of 14
Diagnostic Process Flow Chart
(Continued on following page)
PRELIMINARY CHECK
Fuel level should be between
1/4 and 3/4
Visually inspect for presence
of Fuel/Gas Cap
DO NOT TIGHTEN OR REMOVE!
PRESSURIZE EVAP SYSTEM (System Integrity Check)
This test checks for leaks in the canister and fuel tank sides. The CCV and Air Inlet Lines will be checked
separately.
A) Clamp the air drain hose on the charcoal canister with the supplied hose pliers from the EVAP System
Pressure Test Kit.
B) Locate the vapor pressure sensor. If the vapor pressure sensor has two hoses connected to it,
disconnect the hose between the air drain hose fitting at the vapor pressure sensor and plug the hose.
C) Connect the pressure supply hose from the Pressure Test Kit to the Green EVAP System Service Port
located on the EVAP Purge VSV line in the engine compartment.
D) Using the directions on the inside of the EVAP System Pressure Test Kit lid, pressurize the EVAP
system. Once pressurized, turn off the pump and seal the system (Pressure Hold Switch to ªClosedº
and Vent Switch to ªClosed).
E) After 30 seconds, note the pump pressure gauge reading and the Scan Tool vapor pressure
sensor reading.
F) Compare the readings to one of the four conditions listed below and proceed as directed.
DO NOT PROCEED! NG
OK
SCAN TOOL SETUP
A) Connect Scan Tool to DLC3 on vehicle.
B) Go to the SETUP menu and select UNIT CONVERSION.
C) Under VAPOR PRESSURE, Select ABS for absolute pressure, and mmHg for millimeters of mercury.
This is to match the Repair Manual specifications.
D) Go back to FUNCTION SELECT menu and select ENHANCED OBD II.
E) Select NORMAL MODE. Then select CURRENT DATA and USER SELECT.
F) Using the arrow key, select VAPOR PRESS from the DATA LIST and select YES.
G) Press ENTER. You will now be able to monitor the Vapor Pressure Sensor reading.
START
If vehicle is ECHO, go directly to ªECHO Canister and Tank Leak Checkº on page 14.
If vehicle is not ECHO, follow the flow chart below.
Diagnostic
Tips for Late
Type EVAP
System
(Continued)