1999 TOYOTA CAMRY fuel pressure

EVAP SYSTEM OPERATION INFORMATION ± EG005-01 April 27, 2001
Page 12 of 14
Pump pressure
gauge and vapor
pressure above
atmospheric
pressure (above 762
mmHg). No leak in
canister or tank.Pump pressure
gauge zero, vapor
pressure above
atmospheric
pressure (above 762
mmHg). Leak is on
canister side of
system.Pump pressure
gauge is above
atmospheric
pressure (above
zero), vapor
pressure is at
762 mmHg. Leak is
on the fuel tank side
of system.Pump pressure
gauge at zero,
vapor pressure is
at 762 mmHg. The
leak(s) is/are on the
canister and tank
sides or a leak at a
point common to
both sides of system.
Remove hose pliers
from the air drain
hose on the charcoal
canister before
proceeding with
additional checks.Remove hose pliers
from the air drain
hose on the charcoal
canister before
proceeding with
additional checks.Remove hose pliers
from the air drain
hose on the charcoal
canister before
proceeding with
additional checks.
Go to CCV/Air Inlet
Line Check.Go to ªCanister Leak
Check.º Diagram on
page 13.Go to ªFuel Tank
Leak Check.º
Diagram on page 13.Go to ªFuel Tank
Leak Check.º
Diagram on page 13.
Remove hose pliers
from the air drain
hose on the charcoal
canister before
proceeding with
additional checks.
Go to ªReturn Vehicle to Serviceº on page 14.
CCV and Air Inlet Line Check. (Except ECHO)
A) Disconnect the air inlet line from the charcoal canister.
B) Using the supplied step±down brass adapter (or equivalent) connect the Pressure Supply Hose to
the air inlet line.
C) Using the Scan Tool Active Test, turn on the CCV. This will close the CCV.
D) Pressurize the line. Once pressurized, turn off the pump and seal the line (Pressure Hold Switch to
ªClosedº and Vent Switch to ªClosedº). Pressure should hold. If not, check CCV and connections.
E) Next, using the Scan Tool, turn off the CCV. This will open the CCV. The pressure should decrease.
If not, check the CCV and connections.
F) After completing the test, reconnect air inlet line to charcoal canister. Diagnostic Process Flow Chart (Continued)
(Continued from previous page)
Diagnostic
Tips for Late
Type EVAP
System
(Continued)

EVAP SYSTEM OPERATION INFORMATION ± EG005-01 April 27, 2001
Page 13 of 14
Disconnect
EVAP Hose Here
A. Using the supplied brass step±down adapter, disconnect the EVAP hose from
the charcoal canister side as indicated above. Connect Pressure Supply hose
from Pressure Test Kit to the EVAP hose and pressurize the fuel tank to
30 mmHg (4 kPa / 0.58 psi).
B. Check that the internal pressure of the tank will hold for 1 minute. Check shaded
areas for leaks (soapy water can be used for leak detection). If pressure holds, then
perform the Canister Leak Check.
C. When done, reconnect the EVAP line hose to the charcoal canister. Fuel Tank Leak Check (Except ECHO)
Canister Leak Check (Except ECHO)
A. 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.
B. 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 ªClosedº)
C. With system pressurized at EVAP Service Port, check shaded areas for leaks (soapy
water can be used for leak detection). Diagnostic
Tips for Late
Type EVAP
System
(Continued)

M.I.L. ªONº P0440, P0441 & P0446 ± EG013-02July 12, 2002
Page 2 of 5
Test VSV Operation Using ACTIVE TEST on the Toyota Diagnostic Tester
1. Test operation of the Vapor Pressure Sensor VSV using the Toyota Diagnostic Tester
in ACTIVE TEST (see screen flow in Figure 1).
INJECTOR 0.0ms
IGN ADVANCE 5.0deg
CALC LOAD 0%
MAF 0gm/s
ENGINE SPD 0rpm
COOLANT TEMP 77.0F
INTAKE AIR 87.8F
THROTTLE POS 16%
CTP SW ON
VEHICLE SPD 0MPH
02S B1 S1 0.00V
2: CUSTOMIZE
3: ECU REPROGRAMFUNCTION SELECT FOR
NORTH AMERICA
B
*APPLICATION SELECT*
A
1: DIAGNOSISDIAGNOSTIC MENU
ENGINE
C
PRESS INJ VOL
A/F CONTROL
FUEL PMP SP CTL
A/C CUT SIG
CAN CTRL VSV
EVAP VSV (ALONE)
FUEL PUMP/SPD
LINE PRESS UPSELECT DATA
E
SELECT DATA
D
TANK BYPASS VSVUSER DATA
[ENTER]
F
G
TANK BYPASS VSV OFF
1: OBD/MOBD
3: CARB OBD II
4: BREAK±OUT BOX
5: NVH
6: AUTOPROBE
7: 02 RPM CHECK
8: SNAPSHOT REVIEW
9: SETUP
0: GAS ANALYSIS2: ENHANCED OBD1: DATA LIST
2: DTC INFO
4: SNAPSHOT
5: SYSTEM CHECK
6: RESET MEMORY
7: MONITOR STATUS
8: CHECK MODE
3: ACTIVE TEST
ALL
INJECTOR 0.0ms
IGN ADVANCE 5.0deg
CALC LOAD 0%
MAF 0gm/s
ENGINE SPD 0rpm
COOLANT TEMP 77.0F
INTAKE AIR 87.8F
THROTTLE POS 16%
CTP SW ON
VEHICLE SPD 0MPH
02S B1 S1 0.00V Figure 1: Testing Operation of Vapor Pressure Sensor VSV using ACTIVE TEST
TANK BYPASS VSV ON
NOTE:
Vapor Pressure Sensor VSV is listed as TANK BYPASS VSV on the Diagnostic Tester. Inspection &
Repair
Procedure

G ELECTRICAL WIRING ROUTING
Position of Parts in Engine Compartment
A 1 A/C Condenser Fan Motor
A 2 A/C Magnetic Clutch and Lock Sensor
A 3 A/C Triple Pressure SW
(A/C Dual and Single Pressure SW)
A 4 ABS Actuator
A 5 ABS Actuator
A 6 ABS Speed Sensor Front LH
A 7 ABS Speed Sensor Front RH
A 8 Air Fuel Ratio Sensor
A 9 Airbag Sensor Front LH
A 10 Airbag Sensor Front RH
B 1 Brake Fluid Level Warning SW
C 1 Camshaft Position Sensor
C 2 Crankshaft Position Sensor
C 3 Cruise Control Actuator
D 1 Data Link Connector 1
E 1 Electronically Controlled Transmission Solenoid
E 2 Electronically Controlled Transmission Solenoid
E 3 Engine Coolant Temp. SensorF 1 Front Turn Signal Light and Parking Light LH
F 2 Front Turn Signal Light and Parking Light RH
F 3 Front Wiper Motor
F 4 Fuel Pressure Sensor (Delivery Pipe)
F 5 Fuel Pressure Sensor (Fuel Pipe)
F 6 Fuel Shutoff Valve (Delivery Pipe)
F 7 Fuel Shutoff Valve (Fuel Pressure Regulator)
F 8 Fuel Temp. Sensor (Delivery Pipe)
F 9 Fusible Link Block
F 10 Fusible Link Block
F 11 Fusible Link Block
F 12 Fusible Link Block
F 13 Fusible Link Block
F 14 Fusible Link Block
G 1 Generator
G 2 Generator
H 1 Headlight LH
H 2 Headlight RH
H 3 Horn (High)
H 4 Horn (Low)

ENGINE CONTROL
1 2
1 2
2 1
I 4
I 4 C 10 C23 D4 D 9A 2B14 B6
B 1
B 9
B 11
B 2
B 3
B 4
1 2
1 2 1 314 B B B B
2 3 1 223 BB
BR
B±Y B±YBR B±Y B±Y
BR Y
G±BY±B BRB±YY
LG
BR BRYW±B
W
P±B
P
G
BRB B±Y B±Y B±Y
PIM VC E2
VC VTA E2J18
JUNCTION
CONNECTOR
IDLE AIR CONTROL VALVE
VSV (
EGR)
FUEL SHUTOFF VAL VE
(
DELIVERY PIPE) FUEL SHUTOFF VALVE
(
FUEL PRESSURE
REGULATOR)
AIR FUEL RATIO SENSOR I 1
V 2
F 6F 7
A 8
MANIFOLD ABSOLUTE
PRESSURE SENSOR M 1
INTAKE AIR TEMP. SENSOR
ENGINE COOLANT TEMP. SENSOR I 8
E 3
ENGINE CONTROL MODULEB E 4 E 5ACE 6
(
SHIELDED)
+B AF +
AF± HT L±B
IG1 6
L±B Y±G
2
IB1Y
BR, , DE 7 ,
I 5 IG23
BR
THROTTLE
POSITION
SENSOR T 1BR
B±W
L
IG1 7
G
D 5D7
I 4D 6
23 23
11
G± BY
G±R
Y BR
BR BR
P±B BR
2
1
FUEL TEMP. SENSOR
(
DELIVERY PIPE) F 8
BR W±B
BR
PCNG2 PCNG1 VC VTA E2 PIM THA THW THCNG2 VCNG2 RSD EGR VCNG3 HTAF AF± AF+
BR
LGY
132
Y
B± Y
L
VOUT VC VOUT VC
GND GND
FUEL PRESSURE SENSOR
(
DELIVERY PIPE) F 4
FUEL PRESSURE SENSOR
(
FUEL PIPE) F 5
I 4I 4 I 4 I 4 BR BR BR BR

This system utilizes an engine control module and maintains overall control of the engine, transmission and so on. An outline
of the engine control is explained here.
1. INPUT SIGNALS
(1) Engine coolant temp. signal circuit
The engine coolant temp. sensor detects the engine coolant temp. and has a built±in thermistor with a resistance which
varies according to the engine coolant temp. thus the engine coolant temp. is input in the form of a control signal into
TERMINAL THW of the engine control module.
(2) Intake air temp. signal circuit
The intake air temp. sensor detects the intake air temp. , which is input as a control signal into TERMINAL THA of the
engine control module.
(3) Oxygen sensor signal circuit
The oxygen density in the exhaust gases is detected and input as a control signal into TERMINAL OX2 of the engine
control module.
(4) RPM signal circuit
Camshaft position and crankshaft position are detected by the camshaft position sensor and crankshaft position sensor.
Camshaft position is input as a control signal to TERMINAL G of the engine control module, and engine RPM is input
into TERMINAL NE.
(5) Throttle signal circuit
The throttle position sensor detects the throttle valve opening angle, which is input as a control signal into TERMINAL
VTA of the engine control module.
(6) Vehicle speed signal circuit
The vehicle speed sensor, installed inside the transmission, detects the vehicle speed and inputs a control signal into
TERMINAL SPD of the engine control module.
(7) Park/Neutral position SW signal circuit
The Park/Neutral position SW detects whether the shift position are in neutral, parking or not, and inputs a control signal
into TERMINAL STA of the engine control module.
(8) A/C SW signal circuit
The A/C amplifier is built in the engine control module. The signal from the A/C SW is input into TERMINAL A/CS of the
engine control module.
(9) Battery signal circuit
Voltage is constantly applied to TERMINAL BATT of the engine control module. When the ignition SW is turned on, the
voltage for engine control module start±up power supply is applied to TERMINAL +B of engine control module via EFI
relay.
(10) Intake air volume signal circuit
Intake air volume is detected by the manifold absolute pressure sensor (for manifold pressure) and is input as a control
signal into TERMINAL PIM of the engine control module.
(11) Starter signal circuit
To confirm whether the engine is cranking, the voltage applied to the starter motor during cranking is detected and the
signal is input into TERMINAL NSW of the engine control module as a control signal.
(12) Electrical load signal circuit
The signal when systems such as the rear window defogger, headlights, etc. Which cause a high electrical burden are
on is input to TERMINAL ELS as a control signal.
(13) Air fuel ratio signal circuit
The air fuel ratio is detected and input as a control signal into TERMINAL AF+ of the engine control module.
SYSTEM OUTLINE

L PART NUMBER OF CONNECTORS
Code Part Name Part NumberCodePart Name Part Number
Note : Not all of the above part numbers of the connector are established for the supply. In case of ordering
a connector or terminal with wire, please confirm in advance if there is supply for it using ªParts Catalog
Newsº (published by Parts Engineering Administration Dept.).
A 1A/C Condenser Fan Motor90980±10928
A 2A/C Magnetic Clutch and Lock Sensor90980±10942
A 3A/C Triple Pressure SW (A/C Dual and
Single Pressure SW)90980±10943
A 4ABS Actuator90980±11413
A 5ABS Actuator90980±10891
A 6ABS Speed Sensor Front LH90980±11075A 7ABS Speed Sensor Front RH90980±11 075
A 8Air Fuel Ratio Sensor90980±11178
A 9Airbag Sensor Front LH90980±11856A10Airbag Sensor Front RH90980±11 856
A11A/C Evaporator Temp. Sensor90980±10825
A12A/C SW90980±10631
A13ABS ECU90980±11424
A14ABS ECU90980±11390
A15Air Vent Mode Control Servo Motor90980±11165
A16Airbag Squib (Front Passenger Airbag
Assembly)90980±11884
A17Airbag Squib (Steering Wheel Pad)90980±10850
A18Ashtray Illumination81945±33010
A19ABS Speed Sensor Rear LH90980±11060A20ABS Speed Sensor Rear RH90980±11060
B 1Brake Fluid Level Warning SW90980±11207
B 2Blower Motor90980±10903
B 3Blower Resistor90980±10976
B 4Blower SW90980±10877
B 5Buckle SW LH90980±10825
C 1Camshaft Position Sensor90980±10947C 2Crankshaft Position Sensor90980±10947
C 3Cruise Control Actuator90980±11150
C 4Center Airbag Sensor Assembly90980±11869
C 5Center Airbag Sensor Assembly90980±11872
C 6Center Airbag Sensor Assembly90980±11867
C 7Cigarette Lighter90980±10760
C 8Cigarette Lighter Illumination90980±11148
C 9Clock90980±11013
C10Combination Meter90980±11114
C11Combination Meter90080±98046
C12Combination Meter90980±11115
C13Combination SW90980±11594
C14Combination SW90980±11616
C15Combination SW90980±11672
C16Cruise Control ECU90980±11391
C17Condenser90980±10860
D 1Data Link Connector 190980±11323
D 2Data Link Connector 290980±11417
D 3Data Link Connector 390980±11665
D 4Diode (Courtesy)90980±10962D 5Diode (Dome)90980±10962
D 6Diode (Idle±Up)90980±11071
D 7Door Courtesy SW Front LH
D 8Door Courtesy SW Front RH90980±10871D 9Door Courtesy SW Rear LH90980±10871
D10Door Courtesy SW Rear RH
D11Door Key Lock and Unlock SW Front LH90980±11490D12Door Key Lock and Unlock SW Front RH90980±11490
D13Door Lock Control SW RH90980±11326
D14Door Lock Motor and Door Unlock
Detection SW Front LH
D15Door Lock Motor and Door Unlock
Detection SW Front RH
90980±11150
D16Door Lock Motor and Door Unlock
Detection SW Rear LH90980±11 150
D17Door Lock Motor and Door Unlock
Detection SW Rear RH
E 1Electronically Controlled Transmission
Solenoid90980±11156
E 2Electronically Controlled Transmission
Solenoid90980±11143
E 3Engine Coolant Temp. Sensor90980±10737
E 4Engine Control Module90980±11392
E 5Engine Control Module90980±11391
E 6Engine Control Module90980±11390
E 7Engine Control Module90980±11408
F 1Front Turn Signal Light and Parking Light
LH
90980±11020
F 2Front Turn Signal Light and Parking Light
RH90980±11020
F 3Front Wiper Motor90980±11599
F 4Fuel Pressure Sensor (Delivery Pipe)90980±10845F 5Fuel Pressure Sensor (Fuel Pipe)90980±10845
F 6Fuel Shutoff Valve (Delivery Pipe)90980±11156
F 7Fuel Shutoff Valve (Fuel Pressure
Regulator)90980±11038
F 8Fuel Temp. Sensor (Delivery Pipe)90980±10737
F 9Fusible Link Block90980±09566
F10Fusible Link Block90980±09567
F11Fusible Link Block90980±09566
F12Fusible Link Block99141±13006
F13Fusible Link Block82620±06010
F14Fusible Link Block90980±11579
F15Front Door Speaker LH90980±10825F16Front Door Speaker RH90980±10825
F17Fuel Temp. Sensor and Fuel Shutoff Valve
(Fuel Tank)90980±10795
G 1Generator90980±09213

M OVERALL ELECTRICAL WIRING DIAGRAM
1
234
(
Cont . next page)
2 CAMRY CNG
EFI RELAYCIR OPN RELAY
20A EFI
40A AM1 30A AM2
7. 5A OBD
2 1
3 5
2 1
3 5 1J 10 1K22L 41K 5
82J 2K7
11
1B 41B12A12C10 2J 22F4
11 1B 5
L±B
AM2 6
I10
IGNITION SW4 AM1
ST2IG2
2 IG1 ACC
7 2
11K 31K
5A
IGN
4EB1 5EB1
EB Left radiator
s ide s upport 1F 2F 1C
1A
B±G
BATTERY10A
GA UGE
71WB± Y B± Y
1D 2B± Y
FUSIBLE LINK BLOCK10 IF1
FL MAIN
3. 0WBA
100A
AL T
B±Y
1B±R
BB W±R
2
B±R
BR
IG3 9
BR
A
B±R
B±RB
Y
C
LG
Y
B±Y
LG±B
L±W
B±Y
B±Y B±Y
R± L G± R G± R
2
G± R
3
BB±Y W± B M 1
MANIFOLD ABSOLUTE
PRESSURE SENSORT 1
THROTTLE POSITI ON
SENSOR
B±RL±B L±B
L±B G±R
W± R
W
B
IG2 1
B± R F17
FUEL TEMP. SENSOR AND
FUEL SHUTOFF VALVE (
Fuel Tank)
B± R
1
A1 1
A/ C EVAPORATOR
TEMP. SENSOR
ON ML KJI H G
B±R
Y
LG
B± Y
LG±B
L±R
G±R
G±R
B± Y
B
C12
MALFUNCTION
I NDI CA TOR L AMP
[COMB. METER]
7
2 D D
J 3
JUNCTION
CONNECTOR
JUNCTION
CONNECTOR
B±Y
23 31 1
12
R± LB
PIM VCE2
B± R
Power SourceEngine Control
D
E
F
BR
4IB1 BR
3IG2
BR BR
7IB1
LG±B
EA
W±B
L±R
EA BAL±B
B±YB± Y
, F11 F 9 A C , F14 FB J23 J24A,
2C 5
W± B
B±Y L±B
2IG1
BKUnder the left
center pillar B±RB±R
B±Y
B±R
A
J34
JUNCTION
CONNECTOR
W± B
LG±BBR
B± R BR
2IB1
BR4BR