TOYOTA CAMRY 2000 Service Repair Manual

WIRING DIAGRAM
± 5S±FE ENGINECIRCUIT INSPECTIONEG1±421

(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
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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

WIRING DIAGRAM
± 5S±FE ENGINECIRCUIT INSPECTIONEG1±425

Check operation of VSV when battery positive
voltage is applied and released to the VSV termi±
nals.
Battery positive voltage is applied:
The air from port E is flowing out through the
air filter.
Battery positive voltage is not applied:
The air from port E is flowing out through port
G. (1) Disconnect VSV connector.
(2) Remove VSV.
(1) Measure resistance between terminals.
(2) Measure resistance between each terminal
and the body.
(1) Resistance: 33 ± 39
at 20
C (68
F)
(2) Resistance: 1 M
or higher.
Check VSV for fuel pressure control.
Replace VSV for fuel pressure control VSV.
INSPECTION PROCEDURE
G o to step
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(1) Remove glove compartment
(See page EG1±234).
(2) Turn ignition switch ON.
Measure voltage between terminal FPU of engine
control module connector and body ground.
Check for open and short in harness and connector between engine
control module and VSV, VSV and EFI main relay (See page IN±31). Check voltage between terminal FPU of engine control module
connector and body ground.
Proceed to next circuit inspection shown
on matrix chart (See page EG1±327).
Check and replace engine control module.Repair or replace harness or connector. Voltage: 9 ±14 V
± 5S±FE ENGINECIRCUIT INSPECTIONEG1±427

CIRCUIT DESCRIPTION
This circuit cuts air conditioning operation during vehicle acceleration in order to increase accelera±
tion performance. During acceleration with the vehicle speed at 16 mph (25 km/h) or less, engine
speed at 1,200 rpm or less and throttle valve opening angle at 60or more, the A/C magnet switch
is turned OFF for several seconds.
Air Conditioning Cut Control Circuit
Check for open and short in harness and
connector between ECM and A/C amplifier.
WIRING DIAGRAM
Repair or replace harness or connector.
DIAGNOSTIC CHART
Check and replace A/C amplifier.Check voltage terminal ACT.
Check and replace ECM.
± 5S±FE ENGINECIRCUIT INSPECTIONEG1±428

(1) Remove glove compartment.
(See page EG1±234).
(2) Turn ignition switch ON.
Measure voltage between terminal ACT of engine
control module connector and body ground
when A/C switch is turned to ON.
Check for open and short in harness and connector between engine
control module and A/C amplifier (See page IN±31).
Check voltage between terminal ACT of engine control module
connector and body ground.
Check and replace engine control module.
Repair or replace harness or connector.
INSPECTION PROCEDURE
Check and replace A/C amplifier.Voltage: 9 ±14 V
± 5S±FE ENGINECIRCUIT INSPECTIONEG1±429

DIAGNOSTIC CHART
HINT: If terminals TE1 and TE2 are connected with terminal E1, diagnostic trouble code is not
output or test mode is not activated.
Even though terminal TE1 is not connected with terminal E1, the malfunction indicator lamp
blinks.
For the above phenomenon, the likely cause is an open or short in the wire harness, or
malfunction inside the ECM.
CIRCUIT DESCRIPTION
Terminals TE1 and TE2 are located in the data link connector 1 and 2.
The data link connector 1 located in the engine compartment and the data link connector 2 located
in the cabin. When these terminals are connected with the E1 terminal, diagnostic trouble codes in
normal mode or test mode can be read from the malfunction indicator lamp on the combination meter.
Check for open and short in harness and
connector between data link connector 1, 2
and ECM.Check continuity between terminal E1 and body
ground.
TE1 TE2 Terminal Circuit
Repair or replace harness or connector.Repair or replace harness or connector. Check voltage of terminals TE1, TE2.
WIRING DIAGRAM
Check and replace ECM.Check and replace ECM.
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