check engine TOYOTA CAMRY 2000 Service Repair Manual

(1) Remove glove compartment.
(See page EG1±234)
(2) Turn ignition switch ON.
Exc. California spec.
Measure voltage between terminals #10, #20 of
engine control module connector and body
ground.
Only for California spec,
Measure voltage between terminals #1, #2, #3
and #4 of engine control module connector and
body ground.
Voltage: 9 ±14 V
Check voltage between terminals #10, #20 (#1, #2, #3 and #4) of
engine control module connector and body ground.
INSPECTION PROCEDURE
Go to step
± 5S±FE ENGINECIRCUIT INSPECTIONEG1±412

Check for open in harness and connector between terminals E01, E02
of engine control module connector± and body ground (See page IN±31).
Remove AM2 fuse from J/B No. 2.
Check continuity of AM2 fuse.
Continuity
Check for open in harness and connector
between engine control module and battery.Check for short in all the harness and
components connected to AM2 fuse.
Repair or replace harness or connector.
Check AM2 fuse.
± 5S±FE ENGINECIRCUIT INSPECTIONEG1±413

Check injection volume of injector
(See page EG1±195).
wInjection volume
49 ± 59 cm
(3.0 ± 3.6 cu in.)/15 sec.
Difference between each injector:
Less than 5 cm3 (0.3 cu in.)
wLeakage
Fuel drop: One drop or less per minute. Disconnect injector connector
(See page EG1±189) .
Measure resistance of injector.
Check and replace engine control module.
Check injectors.
Replace injector. Resistance: Approx. 13.8

at 20C (68F)
± 5S±FE ENGINECIRCUIT INSPECTIONEG1±414

CIRCUIT DESCRIPTION
The rotary solenoid type IAC valve is provided on the intake air chamber and intake air bypassing
the throttle valve is directed to the IAC valve through a passage.
In this way the intake air volume bypas±
sing the throttle valve is regulated, con±
trolling the engine speed.
The ECM operated only the IAC valve to
perform idle±up and provide feedback for
the target idling speed, a VSV for idle±up
control is also added (for air condition±
ing).
Check for open and short in harness and
connector between J/B No.2 and IAC valve,
IAC valve and ECM.
IAC Valve Circuit
Repair or replace harness or connector. Check voltage terminals ISCO, ISCC.
Check for ECM power source circuit.
DIAGNOSTIC CHART
Check operation of the IAC valve.Check and replace ECM.
Replace IAC valve.
± 5S±FE ENGINECIRCUIT INSPECTIONEG1±415

(1) Remove glove compartment
(See page EG1±234),
(2) Disconnect the engine control module con±
nectors.
(3) Turn ignition switch ON.
Measure voltage between terminals ISCO, ISCC
of engine control module connector and body
ground.
Check voltage between terminals ISCO, ISCC of engine control
module connector and body ground.
Check and replace engine control module.
INSPECTION PROCEDURE
Voltage: 9 ±14 V
± 5S±FE ENGINECIRCUIT INSPECTIONEG1±417

(1) Disconnect IAC valve connector.
(2) Remove IAC valve (See page EG1±213).
(1) Connect the positive (+) lead from the bat±
tery to terminal 2 (+ B) and negative (±) lead
to terminal 3 (ISCC), and check that the valve
is closed.
(2) Connect the. positive (+) lead from the bat±
tery to terminal 2 (+ B) and negative (±) lead
to terminal 1 (ISCO), and check that the valve
is open.
Check for open and short in harness and connector between J/B No.2
and IAC valve, IAC valve and engine control module (See page IN±31).
Check for ECM power source circuit (See page
EG1±403).
Check operation of the IAC valve.
Repair or replace harness or connector.Replace IAC valve. (1) The valve is closed.
(2) The valve is open.
± 5S±FE ENGINECIRCUIT INSPECTIONEG1±418

Check for open in harness and connector
between circuit opening relay and fuel pump
and body ground. Check for open in harness and connector
between EFI main relay and circuit opening
relay and ECM.Repair or replace harness or connector. Check for ECM power source circuit.
DIAGNOSTIC CHART
Check for circuit opening relay.
Replace circuit opening relay. Check voltage terminal FC. Check and replace ECM.
Replace fuel pump. Check fuel pump.Repair or replace.
± 5S±FE ENGINECIRCUIT INSPECTIONEG1±420

(1) Remove glove compartment.
(See page EG1±234).
(2) Turn ignition switch ON.
Measure voltage between terminal FC of engine
control module connector and body ground.
Check voltage between terminals FC of engine control module
connector and body ground.
Check for ECM power source circuit (See page EG1±403).
Check and replace engine control module.
INSPECTION PROCEDURE
Repair or replace. Voltage: 9 ±14 V
± 5S±FE ENGINECIRCUIT INSPECTIONEG1±422

Check for open in harness and connector between EFI main relay and
circuit opening relay, circuit opening relay and engine control module
(See page IN±31).
(1) Remove glove compartment
(See page EG1±217).
(2) Remove circuit opening relay from R/B No.6.
Check continuity between terminals of circuit
opening relay shown below.
Check for open in harness and connector between circuit opening relay and fuel pump, fuel
pump and body ground.(1) Apply battery voltage between terminals 3
and 6.
(2) Check continuity between terminals 1 and 2.
Check fuel pump (See page EG1±177). Check circuit opening relay.
Repair or replace harness or connector. Replace circuit opening relay.
Replace fuel pump.
Terminals 1 and 2Terminals 1 and 2
Terminals 3 and 6Terminals 2 and 4
ContinuityContinuity
ContinuityOpen
± 5S±FE ENGINECIRCUIT INSPECTIONEG1±423

CIRCUIT DESCRIPTION
VSV Circuit for Fuel Pressure Control (Only for California
spec.)
Check for open and short in harness and
connector between EFI main relay and ECM.Proceed to next circuit inspection
shown on matrix chart
(See page EG1±327).
Repair or replace harness or connector. Check voltage of VSV power source. Check VSV for fuel pressure control.
Check and replace ECM.Replace VSV.
DIAGNOSTIC CHART
The ECM turns on a VSV (Vacuum Switching
Valve) to draw the air into the diaphragm chamber
of the pressure regulator if it detects that the tem-
perature of the engine coolant is too high during
engine starting. The air drawn into the chamber
increases the fuel pressure to prevent fuel vapor
lock at high engine temperature in order to help the
engine start when it is warm.
Fuel pressure control ends approx. 90 secs. after
the engine is started.
± 5S±FE ENGINECIRCUIT INSPECTIONEG1±424