TOYOTA CAMRY 1999 Service Repair Manual

SF07P±04
S04539
MAF MeterMAF Meter Connector

Gasket

Non±reusable part
± SFI (1MZ±FE)MASS AIR FLOW (MAF) METER
SF±33
1532 Author: Date:
MASS AIR FLOW (MAF) METER
COMPONENTS

SF07Q±03
S04755
SF±34
± SFI (1MZ±FE)MASS AIR FLOW (MAF) METER
1533 Author: Date:
REMOVAL
REMOVE MAF METER
(a) Disconnect the MAF meter connector.
(b) Remove the 2 bolts, MAF meter and gasket.
HINT:
At the time of installation, please refer to the following items.
Install a new gasket to the MAF meter.

SF07R±03
S04526
E2THAOhmmeter
S04756
AirVGE2G
Voltmeter
± SFI (1MZ±FE)MASS AIR FLOW (MAF) METER
SF±35
1534 Author: Date:
INSPECTION
1. INSPECT MAF METER RESISTANCE
Using an ohmmeter, measure the resistance between terminals
THA and E2.
Resistance:
TerminalsResistanceTemperature
THA ± E214.6 ± 17.8 kW±20°C (±4°F)
THA ± E22.21 ± 2.69 kW20°C (68°F)
THA ± E20.29 ± 0.35 kW60°C (140°F)
If the resistance is not as specified, replace the MAF meter.
2. INSPECT MAF METER OPERATION
(a) Connect the MAF meter connector.
(b) Turn the ignition switch ON.
(c) Using a voltmeter, connect the positive (+) tester probe to
terminal VG, and negative (±) tester probe to terminal
E2G.
(d) Blow air into the MAF meter, and check that the voltage
fluctuates.
If operation is not as specified, replace the MAF meter.
(e) Turn the ignition switch OFF.
(f) Disconnect the MAF meter connector.

SF07S±01
SF±36
± SFI (1MZ±FE)MASS AIR FLOW (MAF) METER
1535 Author: Date:
INSTALLATION
Installation is in the reverse order of removal. (See page SF±34)

S04593
SF07T±03
S04536
Vacuum
VTAOhmmeter
E2
VC
S04604
Plug
Disconnect
± SFI (1MZ±FE)THROTTLE BODY
SF±37
1536 Author: Date:
THROTTLE BODY
ON±VEHICLE INSPECTION
1. INSPECT THROTTLE BODY
Check that the throttle linkage moves smoothly.
2. INSPECT THROTTLE POSITION SENSOR
(a) Disconnect the sensor connector.
(b) Disconnect the vacuum hose from the throttle body.
(c) Apply vacuum to the throttle opener.
(d) Using an ohmmeter, measure the resistance between
each terminal.
Resistance:
Throttle valve
conditionBetween
terminalsResistance
Fully closedVTA ± E20.2 ± 6.3 kW
Fully openVTA ± E22.0 ± 10.2 kW
±VC ± E22.5 ± 5.9 kW
(e) Reconnect the vacuum hose to the throttle body.
(f) Reconnect the sensor connector.
3. INSPECT THROTTLE OPENER
(a) Allow the engine to warm up to normal operating tempera-
ture.
(b) Check idle speed.
Idle speed: 700 ± 50 rpm
(c) Disconnect the vacuum hose from the throttle opener,
and plug the hose end.
(d) Check the throttle opener setting speed.
Throttle opener setting speed: 900 ± 1,950 rpm
If the throttle opener setting is not as specified, replace the
throttle body.
(e) Stop the engine.
(f) Reconnect the vacuum hose to the throttle opener.
(g) Start the engine and check that the idle speed returns to
the correct speed.

SF07U±03
S04741
EGR Gas Temperature
Sensor Bracket
Gasket
Throttle Body
Throttle Position
Sensor Connector
IAC Valve Connector
Water Bypass Hose
Air Assist Hose
Water Bypass Hose
Air Cleaner Hose Accelerator Cable
Throttle Cable (A/T)
N´m (kgf´cm, ft´lbf)

Non±reusable part: Specified torque
19.5 (200, 14)
SF±38
± SFI (1MZ±FE)THROTTLE BODY
1537 Author: Date:
COMPONENTS

SF07V±03
S04506
S06123
(a)
(b)
(d) (e)
(c)
S04527
EGR Gas Temperature
Sensor Bracket
± SFI (1MZ±FE)THROTTLE BODY
SF±39
1538 Author: Date:
REMOVAL
1. DRAIN ENGINE COOLANT
2. DISCONNECT ACCELERATOR CABLE
3. A/T:
DISCONNECT THROTTLE CABLE
4. REMOVE AIR CLEANER HOSE
(a) Disconnect the PCV hose.
(b) Loosen the 2 hose clamps, and remove the air cleaner
hose.
5. REMOVE THROTTLE BODY
(a) Disconnect the throttle position sensor connector.
(b) Disconnect the IAC valve connector.
(c) Disconnect the water bypass hose (from the intake man-
ifold).
(d) Disconnect the water bypass hose (from the water inlet
housing).
(e) Disconnect the air assist hose.
(f) Remove the 2 bolts, 2 nuts, EGR gas temperature sensor
bracket, throttle body and gasket.
HINT:
At the time of installation, please refer to the following items.
Place a new gasket on the air intake chamber.
Torque: 19.5 N´m (200 kgf´cm, 14 ft´lbf)

SF07W±03
S04582
S04595
Throttle
Stop Screw
No Clearance
Throttle LeverVacuum SF±40
± SFI (1MZ±FE)THROTTLE BODY
1539 Author: Date:
INSPECTION
1. CLEAN THROTTLE BODY
(a) Using a soft brush and carburetor cleaner, clean the cast
parts.
(b) Using compressed air, clean all the passages and aper-
tures.
NOTICE:
To prevent deterioration, do not clean the throttle position
sensor and IAC valve.
2. INSPECT THROTTLE VALVE
(a) Apply vacuum to the throttle opener.
(b) Check that there is no clearance between the throttle stop
screw and throttle lever when the throttle valve is fully
closed.
3. INSPECT THROTTLE POSITION SENSOR
(See page SF±37)

SF07X±01
± SFI (1MZ±FE)THROTTLE BODY
SF±41
1540 Author: Date:
INSTALLATION
Installation is in the reverse order of removal. (See page SF±39)

SF07Y±03
S04529
E1DLC1
SST
TE1
DLC1
S04533
RSC
+B
RSO
Ohmmeter SF±42
± SFI (1MZ±FE)IDLE AIR CONTROL (IAC) VALVE
1541 Author: Date:
IDLE AIR CONTROL (IAC) VALVE
ON±VEHICLE INSPECTION
1. INSPECT IAC VALVE OPERATION
(a) Initial conditions:

Engine at normal operating temperature

Idle speed checked correctly

Transmission in neutral position

A/C switch OFF
(b) Using SST, connect terminals TE1 and E1 of the
DLC1.
SST 09843±18020
(c) After engine speed is kept at approx. 1,000 rpm for 5 se-
conds, check that it returns to idle speed.
If the engine speed operation is not as specified, check the IAC
valve, wiring and ECM.
(d) Remove the SST from the DLC1.
SST 09843±18020
2. INSPECT IAC VALVE RESISTANCE
NOTICE:
ºColdº and ºHotº in the following sentences express the
temperature of the coils themselves. ºColdº is from ±10°C
(14°F) to 50°C (122°F) and ºHotº is from 50°C (122°F) to
100°C (212°F).
(a) Disconnect the IAC valve connector.
(b) Using an ohmmeter, measure the resistance between ter-
minal +B and other terminals (RSC, RSO).
Resistance:
Cold17.0 ± 25.0 W
Hot21.5 ± 29.5 W
If resistance is not as specified, replace the IAC valve.
(c) Reconnect the IAC valve connector.
3. INSPECT AIR ASSIST SYSTEM
(a) Initial conditions:

Engine at normal operating temperature

Idle speed checked correctly

Transmission in neutral position

A/C switch OFF