1999 TOYOTA CAMRY fuel cap

N20160
Ignition
Switch
Fuel
Gauge
Battery
Z05727
Ignition
SwitchFuel
Gauge
Battery
Ie±5±1±A BE1206123
45
N20212
A
B
C BE±48
± BODY ELECTRICALCOMBINATION METER
2268 Author: Date:
(b) Compare the tester with tachometer indications.
DC 13.5 V 25°C at (77 °F)
Standard indicationAllowable range
700630 ± 770
1,000900 ± 1,100
2,0001,850 ± 2,150
3,0002,800 ± 3,200
4,0003,800 ± 4,200
5,0004,800 ± 5,200
6,0005,750 ± 6,250
7,0006,700 ± 7,300
4. INSPECT FUEL RECEIVER GAUGE OPERATION
(a) Disconnect the connector from the sender gauge.
(b) Turn the ignition switch ON, check that the receiver gauge
needle indicates EMPTY.
(c) Connect terminals 2 and 3 on the wire harness side con-
nector through a 3.4±W test bulb.
(d) Turn the ignition switch ON, check that the bulb lights up
and the receiver gauge needle moves towards the full
side.
HINT:
Because of the silicon oil in the gauge, it will take a short time
for needle to stabilize.
If operation is not as specified, inspect the receiver gauge resis-
tance.
5. INSPECT FUEL RECEIVER GAUGE RESISTANCE
Measure the resistance between terminals.
Tester connectionResistance (W)
A ± BApprox. 126.2
A ± CApprox. 280.5
B ± CApprox. 154.3
If resistance value is not as specified, replace the receiver
gauge.

BE16U±01
I12031
Ignition
Switch
Fuel
Gauge
BatteryECM
I12029
Ignition
SwitchFuel Gauge
BatteryWire Harness Side
N20212
A
B
C
I12030
BatteryWarning Light
Ignition
Switch
Wire Harness Side
± BODY ELECTRICALCOMBINATION METER
BE±5
INSPECTION
1. INSPECT FUEL RECEIVER GAUGE OPERATION
(a) Disconnect the connector from the ECM.
(b) Turn the ignition switch ON, check that the receiver gauge
needle indicates EMPTY.
(c) Connect terminals 2 on the wire harness side connector
through a 3.4±W test bulb.
(d) Turn the ignition switch ON, check that the bulb lights up
and the receiver gauge needle moves towards the full
side.
HINT:
Because of the silicon oil in the gauge, it will take a short time
for needle to stabilize.
If operation is not as specified, inspect the receiver gauge resis-
tance.
2. INSPECT FUEL RECEIVER GAUGE RESISTANCE
Measure the resistance between terminals.
Tester connectionResistance (W)
A ± BApprox. 270.1
A ± CApprox. 141.3
B ± CApprox. 128.8
If resistance value is not as specified, replace the receiver
gauge.
3. INSPECT FUEL SENDER GAUGE RESISTANCE
(See page SF±36)
4. INSPECT FUEL LEVEL WARNING LIGHT
(a) Disconnect the connector from the sender gauge.
(b) Connect terminals 8 on the wire harness side connector.
(c) Turn the ignition switch ON, check that the warning light
lights up.
If the warning light does not light up, test the bulb or inspect wire
harness.
5. INSPECT FUEL LEVEL WARNING SWITCH
(See page SF±40)

N20160
Ignition
Switch
Fuel
Gauge
Battery
Z05727
Ignition
SwitchFuel
Gauge
Battery
Ie±5±1±A BE1206123
45
N20212
A
B
C BE±48
± BODY ELECTRICALCOMBINATION METER
2268 Author: Date:
(b) Compare the tester with tachometer indications.
DC 13.5 V 25°C at (77 °F)
Standard indicationAllowable range
700630 ± 770
1,000900 ± 1,100
2,0001,850 ± 2,150
3,0002,800 ± 3,200
4,0003,800 ± 4,200
5,0004,800 ± 5,200
6,0005,750 ± 6,250
7,0006,700 ± 7,300
4. INSPECT FUEL RECEIVER GAUGE OPERATION
(a) Disconnect the connector from the sender gauge.
(b) Turn the ignition switch ON, check that the receiver gauge
needle indicates EMPTY.
(c) Connect terminals 2 and 3 on the wire harness side con-
nector through a 3.4±W test bulb.
(d) Turn the ignition switch ON, check that the bulb lights up
and the receiver gauge needle moves towards the full
side.
HINT:
Because of the silicon oil in the gauge, it will take a short time
for needle to stabilize.
If operation is not as specified, inspect the receiver gauge resis-
tance.
5. INSPECT FUEL RECEIVER GAUGE RESISTANCE
Measure the resistance between terminals.
Tester connectionResistance (W)
A ± BApprox. 126.2
A ± CApprox. 280.5
B ± CApprox. 154.3
If resistance value is not as specified, replace the receiver
gauge.

BE16U±01
I12031
Ignition
Switch
Fuel
Gauge
BatteryECM
I12029
Ignition
SwitchFuel Gauge
BatteryWire Harness Side
N20212
A
B
C
I12030
BatteryWarning Light
Ignition
Switch
Wire Harness Side
± BODY ELECTRICALCOMBINATION METER
BE±5
INSPECTION
1. INSPECT FUEL RECEIVER GAUGE OPERATION
(a) Disconnect the connector from the ECM.
(b) Turn the ignition switch ON, check that the receiver gauge
needle indicates EMPTY.
(c) Connect terminals 2 on the wire harness side connector
through a 3.4±W test bulb.
(d) Turn the ignition switch ON, check that the bulb lights up
and the receiver gauge needle moves towards the full
side.
HINT:
Because of the silicon oil in the gauge, it will take a short time
for needle to stabilize.
If operation is not as specified, inspect the receiver gauge resis-
tance.
2. INSPECT FUEL RECEIVER GAUGE RESISTANCE
Measure the resistance between terminals.
Tester connectionResistance (W)
A ± BApprox. 270.1
A ± CApprox. 141.3
B ± CApprox. 128.8
If resistance value is not as specified, replace the receiver
gauge.
3. INSPECT FUEL SENDER GAUGE RESISTANCE
(See page SF±36)
4. INSPECT FUEL LEVEL WARNING LIGHT
(a) Disconnect the connector from the sender gauge.
(b) Connect terminals 8 on the wire harness side connector.
(c) Turn the ignition switch ON, check that the warning light
lights up.
If the warning light does not light up, test the bulb or inspect wire
harness.
5. INSPECT FUEL LEVEL WARNING SWITCH
(See page SF±40)

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

FI4741
(fig.1)
Acceptable
Resistance kW
± 20 0 20 40 60 80 100
(± 4) (32) (68) (104) (140) (176) (212) 30
20
10
5
3
2
1
0.5
0.3
0.2
0.1
Te m p .°C (F°)
± DIAGNOSTICSENGINE (5S±FE)
DI±35
270 Author: Date:
DTC P0110 Intake Air Temp. Circuit Malfunction
CIRCUIT DESCRIPTION
The intake air temp. sensor is built into the air cleaner cap and
senses the intake air temperature.
A thermistor built in the sensor changes the resistance value
according to the intake air temperature, the lower the intake air
temperature, the greater the thermistor resistance value, and
the higher the intake air temperature, the lower the thermistor
resistance value (See fig.1).
The air intake temperature sensor is connected to the ECM
(See below). The 5 V power source voltage in the ECM is ap-
plied to the intake air temp. sensor from the terminal THA via
a resistor R.
That is, the resistor R and the intake air temp. sensor are con-
nected in series. When the resistance value of the intake air
temp. sensor changes in accordance with changes in the intake
air temperature, the potential at terminal THA also changes.
Based on this signal, the ECM increases the fuel injection vol-
ume to improve driveability during cold engine operation.
If the ECM detects the DTC P0110, it operates the fail safe func-
tion in which the intake air temperature is assumed to be 20°C
(68°F).
DTC No.DTC Detecting ConditionTrouble Area
P0110Open or short in intake air temp. sensor circuit

Open or short in intake air temp. sensor circuit

Intake air temp. sensor

ECM
HINT:
After confirming DTC P0110, use the OBD II scan tool or TOYOTA hand±held tester to confirm the intake
air temperature from the CURRENT DATA.
Temperature DisplayedMalfunction
±40°C (±40°F)Open circuit
140°C (284°F) or moreShort circuit
DI00O±05

A06549
ECM
VSV for
EVAPVapor Pressure
Sensor
VSV for Vapor
Pressure Sensor
Charcoal CanisterFuel Tank fig.1
(1)
(2)
(3)Fuel Tank Over Fill
Check Valve
(9) (8) (4) (6)
(5) (7) DI±122
± DIAGNOSTICSENGINE (5S±FE)
357 Author: Date:
DTC P0440 Evaporative Emission Control System
Malfunction
CIRCUIT DESCRIPTION
The vapor pressure sensor and VSV for vapor pressure sensor are used to detect abnormalities in the evap-
orative emission control system.
The ECM decides whether there is an abnormality in the evaporative emission control system based on the
vapor pressure sensor signal.
DTC P0440 is recorded by the ECM when evaporative emissions leak from the components within the dotted
line in fig. 1 below, or when the vapor pressure sensor malfunctions.

DTC No.DTC Detecting ConditionTrouble Area
P0440Fuel tank pressure is atmospheric pressure after vehicle is
driven for 20 min. (2 trip detection logic)

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
DI1JZ±04

A07552
3
2
1Y
P
BRECM
1
1
7
9
22 J19
J/C
8
E8
E8
EBE8
E01 E9
E8
EJ/C
J28
J27
10
1V
6
2F From
BatteryB±Y VSV
for EVAP
2V±W
VSV for Vapor
Pressure
Sensor
9
Engine Room J/B No.2 B±Y
EFI II3
53
B±Y
VC
PTNK
E2
EVP
TPC5 V
E1
E01
2J 2A
2K
2
*1: w/o Immobiliser
*2: w/ Immobiliser
(*1) (*2)
MREL(*2)
E8
8
E9
3
E8
16
E10
7 Y Y Vapor Pressure Sensor
P P
BR BR
E
ID1 ID1
1
V V
B±Y
B±W B±W
II4 II4
5
ID1
ID1
ID1
6 5
237
8
II4 II4
II2
(*1) (*2)(*1) (*2)
W±B
B±Y12
BB
B±Y
12
7 4
EFI Relay J27 J27B±Y
B
BJ/C
(*2) (*2)
B±R(*1)From
Ignition SW
± DIAGNOSTICSENGINE (5S±FE)
DI±123
358 Author: Date:
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:

If DTC P0441 (Evaporative Emission Control System Incorrect Purge Flow), P0446 (Evaporative
Emission Control System Vent Control Malfunction), P0450 (Evaporative Emission Control System
Pressure Sensor Malfunction) or P0451 is output after DTC P0440 (Evaporative Emission Control Sys-
tem Malfunction), first troubleshoot DTC P0441, P0446, P0450 or P0451. If no malfunction is detected,
troubleshoot DTC P0440 next.

Ask the customer whether, after the MIL came on, the customer found the fuel tank cap loose and tight-
ened it. Also ask the customer whether the fuel tank cap was loose when refuelling. If the fuel tank cap
was not loose, it was the cause of the DTC. If the fuel tank cap was not loose or if the customer was
not sure if it was loose, troubleshoot according to the following procedure.

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 warmed up or not, the air±fuel
ratio lean or rich, etc. at the time of the malfunction.

When the ENGINE RUN TIME in the freeze frame data is less than 200 seconds, carefully check the
VSV for EVAP, charcoal canister and vapor pressure sensor.