2000 TOYOTA CAMRY lights

± DIAGNOSTICSENGINE (5S±FE)
DI±17
252 Author: Date:
DTC No.
(See Page)Detection ItemTrouble AreaMIL*1Memory
P0136
(DI±77)Heated Oxygen Sensor Circuit
Malfunction
(Bank 1 Sensor 2)
Heated oxygen sensor
P0141
(DI±75) Heated Oxygen Sensor Heater
Circuit Malfunction
(Bank 1 Sensor 2)
Same as DTC P0135
*3
P0171
(DI±84)
System too Lean
(Fuel Trim)
(Except California Spec.)
Air intake (hose loose)
Fuel line pressure
Injector blockage
Heated oxygen sensor (bank 1 sensor 1)
Manifold absolute pressure sensor
Engine coolant temp. sensor
*1
*3
P0172
(DI±84)
System too Rich
(Fuel Trim)
(Except California Spec.)
Fuel line pressure
Injector leak, blockage
Heated oxygen sensor (bank 1 sensor 1)
Manifold absolute pressure sensor
Engine coolant temp. sensor
*1
*4
P0171
(DI±79)
System too Lean
(Fuel Trim)
(Only for California Spec.)
Air intake (hose loose)
Fuel line pressure
Injector blockage
Manifold absolute pressure sensor
Engine coolant temp. sensor
A/F sensor
*1
*4
P0172
(DI±79)
System too Rich
(Fuel Trim)
(Only for California Spec.)
Fuel line pressure
Injector leak, blockage
Manifold absolute pressure sensor
Engine coolant temp. sensor
A/F sensor
*1
P0300
(DI±89)Random/Multiple Cylinder
Misfire Detected
Ignition system
Injector
Fuel line pressure
EGR
Ci
P0301
P0302
P0303
P0304
(DI±89)Misfire Detected
± Cylinder 1
± Cylinder 2
± Cylinder 3
± Cylinder 4
Compression pressure
Valve clearance not to specification
Valve timing
Manifold absolute pressure sensor
Engine coolant temp. sensor
Open or short engine wire
Connector connection
ECM
*2
P0325
(DI±97)Knock Sensor 1 Circuit
MalfunctionOpen or short in knock sensor 1 circuit
Knock sensor 1 (looseness)
ECM
*1
P0335
(DI±100)Crankshaft Position Sensor
ºAº Circuit Malfunction
Open or short in crankshaft position sensor circuit
Crankshaft position sensor
Starter
ECM
*1
*1: MIL lights up
*
2: MIL lights up or blinking
*
3: Except California Specification vehicles
*
4: Only for California Specification vehicles

DI±18
± DIAGNOSTICSENGINE (5S±FE)
253 Author: Date:
DTC No.
(See Page)Detection ItemTrouble AreaMIL*1Memory
P0340
(DI±103)Camshaft Position Sensor
Circuit Malfunction
Open or short in camshaft position sensor circuit
Camshaft position sensor
Distributor
Starter
ECM

P0401
(DI±105)Exhaust Gas Recirculation
Flow Insufficient Detected
EGR valve stuck closed
Open or short in VSV circuit for EGR
Vacuum or EGR hose disconnected
Manifold absolute pressure sensor
EGR VSV open or close malfunction
ECM

P0402
(DI±113)Exhaust Gas Recirculation
Flow Excessive Detected
EGR valve stuck open
Vacuum or EGR hose is connected to wrong post
Manifold absolute pressure sensor
ECM

*2
P0420
(DI±116)
Catalyst System Efficiency
Below Threshold
(Except California Spec.)Three±way catalytic converter
Open or short in heated oxygen sensor circuit
Heated oxygen sensor

*3
P0420
(DI±119)
Catalyst System Efficiency
Below Threshold
(Only for California Spec.)
Three±way catalystic converter
Open short in heated oxygen sensor (bank 1 sensor 2) circuit
Heated oxygen sensor (bank 1 sensor 2)
Open or short in A/F sensor circuit
A/F sensor

P0440
(DI±122)Evaporative Emission Control
System Malfunction
Vapor pressure sensor
Fuel tank cap incorrectly installed
Fuel tank cap cracked or damaged
Vacuum hose cracked, holed, blocked, damaged or
disconnected ((1) or (2) in fig. 1)
Hose or tube cracked, holed, damaged or loose seal
((3) in fig. 1)
Fuel tank cracked, holed or damaged
Charcoal canister cracked, holed or damaged
Fuel tank over fill check valve cracked or damaged

P0441
(DI±129)Evaporative Emission Control
System Incorrect Purge Flow
Open or short in VSV circuit for vapor pressure sensor
VSV for vapor pressure sensor
Open or short in vapor pressure sensor circuit
Vapor pressure sensor
O h t i VSV i it f EVAP

P0446
(DI±129)Evaporative Emission Control
System Vent Control
Malfunction
Open or short in VSV circuit for EVAP
VSV for EVAP
Vacuum hose cracks, hole, blocked, damaged or disconnected
((1), (4), (5) holed (6) and (7) in fig. 1)
Charcoal canister cracked, holed or damaged
Fuel tank over fill check valve cracked or damaged

P0450
(DI±142)Evaporative Emission Control
System Pressure Sensor
Malfunction
Open or short in vapor pressure sensor circuit
V

P0451
(DI±142)Evaporative Emission Control
System Pressure Sensor
(Range/performance)Vapor pressure sensor
ECM

*1: 


MIL lights up
*
2: Except California Specification vehicles
*
3: Only for California Specification vehicles

± DIAGNOSTICSENGINE (5S±FE)
DI±19
254 Author: Date:
DTC No.
(See Page)Detection ItemTrouble AreaMIL*1Memory
P0500
(DI±145)Vehicle Speed Sensor
Malfunction
Combination meter
Open or short in No.1 vehicle speed sensor circuit
No.1 vehicle speed sensor
ECM

P0505
(DI±148)Idle Control System
Malfunction
IAC valve is stuck or closed
Open or short in IAC valve circuit
Open or short in A/C switch circuit
Air intake (hose loose)
ECM

*1: 


MIL lights up
2. MANUFACTURER CONTROLLED
DTC No.
(See Page)Detection ItemTrouble AreaMIL*1Memory
*2
P1130
(DI±152)A/F Sensor Circuit
Range/Performance MalfunctionOpen or short in A/F sensor circuit
A/F sensor
ECM

*2
P1133
(DI±157)A/F Sensor Circuit Response
MalfunctionA/F sensor
*2
P1135
(DI±161)A/F Sensor Heater Circuit
MalfunctionOpen or short in heater circuit of A/F sensor
A/F sensor heater
ECM

P1300
(DI±163)Igniter Circuit Malfunction (No.1)
Open or short in IGF or IGT circuit from igniter to ECM
Ignition coil (No.1)
ECM

P1310
(DI±163)Igniter Circuit Malfunction (No.2)
Open or short in IGF or IGT circuit from igniter to ECM
Ignition coil (No.2)
ECM

P1335
(DI±169)Crankshaft Position Sensor Cir-
cuit Malfunction
(During engine running)Open short in crankshaft position sensor circuit
Crankshaft position sensor
ECM
±
*3
P1520
(DI±170)Stop Light Switch Signal Mal-
functionShort in stop light switch signal circuit
Stop light switch
ECM

P1600
(DI±173)ECM BATT MalfunctionOpen in back up power source circuit
ECM
*3
P1780
(DI±175)Park/Neutral Position Switch
MalfunctionShort in park/neutral position switch circuit
Park/neutral position switch
ECM

*1: 


MIL lights up
*
2: Only for California Specification vehicles
*
3: Only for A/T models

DI±24
± DIAGNOSTICSENGINE (5S±FE)
259 Author: Date:
Symbols (Terminals No.)Wiring ColorConditionSTD Voltage (V)
*1GBR
IdlingBelow 3.01
HTAF (E9 ± 2) ± E04 (E9 ± 15)G e BR
IG switch ON9 ~ 14
LOCK IN (E9 ± 18)
± E1 (E9 ± 14)W ± L e BRA/C compressor is operatingPulse generation
(See page DI±190)
LOCK (E7 15) E1(E9 14)RWBRA/C indicator light lights upBelow 4.0LOCK (E7 ± 15) ± E1(E9 ± 14)R ± W e BRA/C indicator light does not lights upBelow 1.0
A/C SW (E7 ± 10)RBBRA/C switch ON9 ~ 14A/C SW (E7 10)
± E1 (E9 ± 14)R ± B e BRA/C switch OFFBelow 1.0
PRS (E7 ± 13) ± E1 (E9 ± 14)G e BRA/C pressure is normallyBelow 1.0
THR (E8 10) E2 (E8 9)LRBRIG switch ON, A/C evaporator temp. 0°C (32°F)2.2 ~ 2.6THR (E8 ± 10) ± E2 (E8 ± 9)L ± R e BRIG switch ON, A/C evaporator temp. 15°C (59°F)1.4 ~ 1.8
MGC (E7 21) E01(E9 14)LYBRA/C magnetic clutch ONBelow 1.0MGC (E7 ± 21) ± E01(E9 ± 14)L ± Y e BRA/C magnetic clutch OFF9 ~ 14
* STP (E7 4) E1 (E9 14)GWBRIG switch ON, Brake pedal depressed7.5 ~ 14* STP (E7 ± 4) ± E1 (E9 ± 14)G ± W e BRIG switch ON, Brake pedal releasedBelow 1.5
ELS (E7 2) E1 (E9 14)BRBRDefogger switch and taillight switch ON7.5 ~ 14ELS (E7 ± 2) ± E1 (E9 ± 14)B ± R e BRDefogger switch and taillight switch OFFBelow 1.5
PSSW (E8 ± 12) BLBRIG switch ON9 ~ 14PSSW (E8 12)
± E1 (E9 ± 14)B ± L e BRAt idling, Turn steering wheel to lock positionBelow 3.0
SIL (E7 ± 16) ± E1 (E9 ± 14)W e BRDuring transmissionPulse generation
*: Only for A/T models
*1: Only for California Specification vehicles

± DIAGNOSTICSENGINE (5S±FE)
DI±27
262 Author: Date:
Symbols (Terminals No.)Wiring ColorConditionSTD Voltage (V)
*1GBR
IdlingBelow 3.01
HTAF (E9 ± 2) ± E04 (E9 ± 15)G e BR
IG switch ON9 ~ 14
LOCK IN (E9 ± 19)
± E1 (E9 ± 24)W ± L e BRA/C compressor is operatingPulse generation
(See page DI±190)
LOCK (E7 ± 20)RWBRA/C indicator light lights upBelow 4.0LOCK (E7 20)
± E1 (E9 ± 24)R ± W e BRA/C indicator light does not lights upBelow 1.0
A/C SW (E7 ± 10)RBBRA/C switch ON9 ~ 14A/C SW (E7 10)
± E1 (E9 ± 24)R ± B e BRA/C switch OFFBelow 1.0
PRS (E7 ± 19) ± E1 (E9 ± 24)G e BRA/C pressure is normallyBelow 1.0
THR (E8 11) E2 (E8 9)LRBRIG switch ON, A/C evaporator temp. 0°C (32°F)2.2 ~ 2.6THR (E8 ± 11) ± E2 (E8 ± 9)L ± R e BRIG switch ON, A/C evaporator temp. 15°C (59°F)1.4 ~ 1.8
MGC (E7 ± 21)LYBRA/C magnetic clutch ONBelow 1.0MGC (E7 21)
± E01 (E9 ± 13)L ± Y e BRA/C magnetic clutch OFF9 ~ 14
* STP (E7 9) E1 (E9 24)GWBRIG switch ON, Brake pedal depressed7.5 ~ 14* STP (E7 ± 9) ± E1 (E9 ± 24)G ± W e BRIG switch ON, Brake pedal releasedBelow 1.5
ELS (E7 13) E1 (E9 24)BRBRDefogger switch and taillight switch ON7.5 ~ 14ELS (E7 ± 13) ± E1 (E9 ± 24)B ± R e BRDefogger switch and taillight switch OFFBelow 1.5
PSSW (E9 ± 4) BLBRIG switch ON9 ~ 14PSSW (E9 4)
± E1 (E9 ± 24)B ± L e BRAt idling, Turn steering wheel to lock positionBelow 3.0
SIL (E7 ± 6) ± E1 (E9 ± 24)W e BRDuring transmissionPulse generation
TACH (E7 ± 7) ± E1 (E9 ± 24)B ± O eBRIdlingPulse generation
KSW (E10 4) E1 (E9 24)LBBRAt the time of inserting keyBelow 1.5KSW (E10 ± 4) ± E1 (E9 ± 24)L ± B e BRIn the condition without key insertedPulse generation
RXCK (E10 ± 3)
± E1 (E9 ± 24)R ± L eBRAt the time of inserting keyPulse generation
CODE (E10 ± 8)
± E1 (E9 ± 24)G ± W eBRAt the time of inserting keyPulse generation
TXCT (E10 ± 1)
± E1 (E9 ± 24)L ± Y eBRAt the time of inserting keyPulse generation
IMLD (E10 ± 1) ± E1 (E9 ± 24)R ± Y eBRIn the condition without key insertedPulse generation
MREL (E10 ± 7)
± E1 (E9 ± 24)B ± W eBRIG switch ON9 ~ 14
IGSW (E7 ± 1) ± E1 (E9 ± 24)B ± ReBRIG switch ON9 ~ 14
*: Only for A/T models
*1: Only for California Specification vehicles

± DIAGNOSTICSENGINE (5S±FE)
DI±79
314 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 (loose hoses)

Fuel line pressure

Injector blockage

Manifold absolute pressure sensor

Engine coolant temp. sensor

A/F sensor
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

Manifold absolute pressure sensor

Engine coolant temp. sensor

A/F sensor
HINT:

When the DTC P0171 is recorded, the actual air±fuel ratio is on the lean side. When DTC P0172 is
recorded, the actual air±fuel ratio is on the rich side.

If the vehicle runs out of fuel, the air±fuel ratio is lean and DTC P0171 is recorded. The MIL then comes
on.

If the total of the short±term fuel trim value and long±term fuel trim value is within + 38 %, the system
is functioning normally.

The A/F sensor output voltage and the short±term fuel trim value can be read using the OBD II scan
tool or TOYOTA hand±held tester.

The ECM controls the voltage of AF
and AF terminals of ECM to the fixed voltage. Therefore, it
is impossible to confirm the A/F sensor output voltage without OBD II scan tool or TOYOTA hand±held
tester.
DI1JW±03

DI±84
± DIAGNOSTICSENGINE (5S±FE)
319 Author: Date:
DTC P0171 System too Lean (Fuel Trim)
(Except California Spec.)
DTC P0172 System too Rich (Fuel Trim)
(Except 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 heated oxygen sensor indicates whether the air±fuel ratio is RICH or
LEAN compared to the ideal theoretical value, triggering a reduction in fuel volume if the air±fuel ratio is rich,
and an increase in fuel volume if it is lean.
Long±term fuel trim is overall fuel compensation carried out long±term to compensate for continual deviation
of the short±term fuel trim from the central value due to individual engine differences, wear over time and
changes in the usage environment.
If both the short±term fuel trim and long±term fuel trim are LEAN or RICH beyond 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

Heated oxygen sensor (bank 1 sensor 1)

Manifold absolute pressure sensor

Engine coolant temp. sensor
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

Heated oxygen sensor (bank 1 sensor 1)

Manifold absolute pressure sensor

Engine coolant temp. sensor
HINT:

When the DTC P0171 is recorded, the actual air±fuel ratio is on the LEAN side. When DTC P0172 is
recorded, the actual air±fuel ratio is on the RICH side.

If the vehicle runs out of fuel, the air±fuel ratio is LEAN and DTC P0171 is recorded. The MIL then
comes on.

If the total of the short±term fuel trim value and long±term fuel trim value is within + 38 %, the system
is functioning normally.

The heated oxygen sensor (bank 1 sensor 1) output voltage and the short±term fuel trim value can
be read using the OBD II scan tool or TOYOTA hand±held tester.
DI4NG±01

± DIAGNOSTICSENGINE (5S±FE)
DI±89
324 Author: Date:
DTC P0300 Random/Multiple Cylinder Misfire Detected
DTC P0301 Cylinder 1 Misfire Detected
DTC P0302 Cylinder 2 Misfire Detected
DTC P0303 Cylinder 3 Misfire Detected
DTC P0304 Cylinder 4 Misfire Detected
CIRCUIT DESCRIPTION
Misfire: The ECM uses the crankshaft position sensor and camshaft position sensor to monitor changes in
the crankshaft rotation for each cylinder.
The ECM counts the number of times the engine speed change rate indicates that misfire has occurred. And
when the misfire rate equals or exceeds the count indicating that the engine condition has deteriorated, the
MIL lights up.
If the misfire rate is high enough and the driving conditions will cause catalyst overheating, the MIL blinks
when misfiring occurs.
DTC No.DTC Detecting ConditionTrouble Area
P0300Mi fi i f d li d i d t t d d i ti l

Ignition system

Injector

Fuel line pressure

EGR
P0300
P0301
P0302
P0303
P0304
Misfiring of random cylinders is detected during any particular
200 or 1,000 revolutions
For any particular 200 revolutions for engine, misfiring is de-
tected which can cause catalyst overheating
(This causes MIL to blink)

EGR

Compression pressure

Valve clearance not to specification

Valve timing

Manifold absolute pressure sensor
P0304(This causes MIL to blink)
Manifold absolute ressure sensor

Engine coolant temp. sensor

Open or short in engine wire

Connector connection

ECM
HINT:
When the 2 or more codes for a misfiring cylinder are recorded repeatedly but no random misfire code is
recorded, it indicates that the misfires were detected and recorded at different times.
DI011±07