2000 TOYOTA CAMRY Fuel line

± DIAGNOSTICSENGINE (1MZ±FE)
DI±213
448 Author: Date:
DTC No.
(See Page)Detection ItemTrouble AreaMILMemory
P0300
(DI±276)Random/Multiple Cylinder
Misfire DetectedIgnition system
Injector
Fuel line pressure
EGR
P0301
P0302
P0303
P0304
P0305
P0306
(DI±276)Misfire Detected
± Cylinder 1
± Cylinder 2
± Cylinder 3
± Cylinder 4
± Cylinder 5
± Cylinder 6
EGR
Compression pressure
Valve clearance not to specification
Valve timing
Mass air flow meter
Engine coolant temp. sensor
Open or short engine wire
Connector connection
ECM
*2
P0325
(DI±283)Knock Sensor 1 Circuit
MalfunctionOpen or short in knock sensor 1 circuit
Knock sensor 1 (looseness)
ECM
*1
P0330
(DI±283)Knock Sensor 2 Circuit
MalfunctionOpen or short in knock sensor 2 circuit
Knock sensor 2 (looseness)
ECM
*1
P0335
(DI±287)Crankshaft Position Sensor
ºAº Circuit Malfunction
Open or short in crankshaft position sensor circuit
Crankshaft position sensor
Starter
ECM
*1
P0340
(DI±290)Camshaft Position Sensor
Circuit Malfunction
Open or short in camshaft position sensor circuit
Camshaft position sensor
Starter
ECM
*1
P0401
(DI±292)Exhaust Gas Recirculation
Flow Insufficient Detected
EGR valve (stuck closed)
Open or short in EGR gas temp. sensor circuit
EGR gas temp. sensor
Open in VSV circuit for EGR
VSV for EGR
Vacuum control valve
Vacuum hose disconnected or blocked
ECM
*1
P0402
(DI±302)Exhaust Gas Recirculation
Flow Excessive Detected
EGR valve stuck open
VSV for EGR open malfunction
Short in VSV circuit for EGR
Open or short in EGR valve position sensor circuit
EGR valve position sensor
ECM
*1
*3
P0420
(DI±305)Catalyst System Efficiency
Below Threshold
(Except California Spec.)Three±way catalytic converter
Open or short in heated oxygen sensor circuit
Heated oxygen sensor
*2
*4
P0420
(DI±308)Catalyst System Efficiency
Below Threshold
(Only for California Spec.)
Three±way catalytic converter
Open or short in heated oxygen sensor (bank 1, sensor 2)
circuit
Heated oxygen sensor (bank 1, sensor 2)
Open or short in A/F sensor (bank 1, 2 sensor 1) circuit
A/F sensor (bank 1, 2 sensor 1)
*2
*1: MIL lights up
*2: MIL lights up on U.S.A and Canadian specification vehicles
*3: Except California specification vehicles
*4: Only for California specification vehicle

P24296
ECM
Throttle Position
Sensor
VC
VTA1
E2
S05019
ECM
1
3
25 V
VC
VTA1
E2 Y
L
BR Throttle Position Sensor
E102
23
18 E10
E10
± DIAGNOSTICSENGINE (1MZ±FE)
DI±239
474 Author: Date:
DTC P0120 Throttle/Pedal Position Sensor/Switch ºAº
Circuit Malfunction
CIRCUIT DESCRIPTION
The throttle position sensor is mounted in the throttle body and
detects the throttle valve opening angle. When the throttle valve
is fully closed, a voltage of approximately 0.7 V is applied to ter-
minal VTA of the ECM. The voltage applied to the terminals VTA
of the ECM increases in proportion to the opening angle of the
throttle valve and becomes approximately 2.7 ~ 5.2 V when the
throttle valve is fully opened. the ECM judges the vehicle driving
conditions from these signals input from terminals VTA and
uses them as one of the conditions for deciding the air±fuel ratio
correction, power increase correction and fuel±cut control etc.
DTC No.DTC Detecting ConditionTrouble Area
P0120
Condition (a) or (b) continues:
(a) VTA
0.1 V
(b) VTA
4.9 V

Open or short in throttle position sensor circuit

Throttle position sensor

ECM
HINT:
After confirming DTC P0120, use the OBD II scan tool or TOYOTA hand±held tester to confirm the throttle
valve opening percentage and closed throttle position switch condition.
Throttle valve opening position
expressed as percentage
Trouble Area
Throttle valve fully closedThrottle valve fully open
Trouble Area
0 %0 %VC line open
VTA line open or short
Approx. 100 %Approx. 100 %E2 line open
WIRING DIAGRAM
DI07K±06

± DIAGNOSTICSENGINE (1MZ±FE)
DI±247
482 Author: Date:
4 Check whether misfire is occurred or not by monitoring DTC and data list.
NG Perform troubleshooting for misfire
(See page DI±351).
OK
5 Check air induction system (See page SF±1).
NG Repair or replace.
OK
6 Check EGR system (See page EC±11).
NG Replace EGR system.
OK
7 Check fuel pressure (See page SF±6).
NG Check and repair fuel pump, fuel pipe line and
filter (See page SF±1).
OK
8 Check injector injection (See page SF±25)
NG Replace injector.
OK

± DIAGNOSTICSENGINE (1MZ±FE)
DI±253
488 Author: Date:
4 Check resistance of A/F sensor heaters (bank1, 2 sensor1) (See page SF±68).
NG Replace A/F sensor.
OK
5 Check air induction system (See page SF±1).
NG Repair or replace.
OK
6 Check EGR system (See page EC±11).
NG Replace EGR system.
OK
7 Check fuel pressure (See page SF±21).
NG Check and repair fuel pump, fuel pipe line and
filter (See page SF±1).
OK
8 Check injector injection (See page SF±25).
NG Replace injector.
OK

± DIAGNOSTICSENGINE (1MZ±FE)
DI±257
492 Author: Date:
3 Check for open and short in harness and connector between ECM and heated
oxygen sensors (bank1, 2 sensor1) (See page IN±31).
NG Repair or replace harness or connector.
OK
4 Check air induction system (See page SF±1).
NG Repair or replace.
OK
5 Check EGR system (See page EC±11).
NG Replace EGR system.
OK
6 Check fuel pressure (See page SF±6).
NG Check and repair fuel pump, fuel pipe line and
filter (See page SF±1).
OK

± DIAGNOSTICSENGINE (1MZ±FE)
DI±261
496 Author: Date:
5 Check EGR system (See page EC±11).
NG Replace EGR system.
OK
6 Check fuel pressure (See page SF±1).
NG Check and repair fuel pump, fuel pipe line and
filter (See page SF±1).
OK
7 Check injector injection (See page SF±25).
NG Replace injector.
OK
Replace heated oxygen sensors
(bank1, 2 sensor1).
8 Perform confirmation driving pattern (See page DI±255).
Go

± DIAGNOSTICSENGINE (1MZ±FE)
DI±267
502 Author: Date:
DTC P0171 System too Lean (Fuel Trim)
(Only for California Spec.)
DTC P0172 System too Rich (Fuel Trim)
(Only for California Spec.)
CIRCUIT DESCRIPTION
Fuel trim refers to the feedback compensation value compared against the basic injection time. Fuel trim
includes short±term fuel trim and long±term fuel trim.
Short±term fuel trim is the short±term fuel compensation used to maintain the air±fuel ratio at its ideal
theoretical value.
The signal from the A/F sensor is approximately proportional to the existing air±fuel ratio, and ECM compar-
ing it with the ideal theoretical value, the ECM reduces fuel volume immediately if the air±fuel ratio is rich
and increases fuel volume if it is lean.
Long±term fuel trim compensates the deviation from the central value of the short±term fuel trim stored up
by each engine tolerance, and the deviation from the central value due to the passage of time and changes
of using environment.
If both the short±term fuel trim and long±term fuel trim exceed a certain value, it is detected as a malfunction
and the MIL lights up.
DTC No.DTC Detecting ConditionTrouble Area
P0171
When air fuel ratio feedback is stable after engine warming up,
fuel trim is considerably in error on RICH side
(2 trip detection logic)

Gas leakage on exhaust system

Air intake (hose loose)

Fuel line pressure

Injector blockage

Mass air flow meter

Engine coolant temp. sensor

A/F sensors (bank 1, 2 sensor 1)
P0172
When air fuel ratio feedback is stable after engine warming up,
fuel trim is considerably in error on LEAN side
(2 trip detection logic)

Gas leakage on exhaust system

Fuel line pressure

Injector leak, blockage

Mass air flow meter

Engine coolant temp. sensor

A/F sensors (bank 1, 2 sensor 1)
DI07R±05

± DIAGNOSTICSENGINE (1MZ±FE)
DI±269
504 Author: Date:
4 Check for spark and ignition (See page IG±1).
NG Repair or replace.
OK
5 Check fuel pressure (See page SF±21).
NG Check and repair fuel pump, pressure regulator,
fuel pipe line and filter (See page SF±1).
OK
6 Check gas leakage on exhaust system.
NG Repair or replace.
OK