2000 TOYOTA CAMRY Fuse a

CIRCUIT DESCRIPTION
When the ignition switch is turned on, battery positive voltage is applied to the coil, closing the
contacts of the EFI main relay and supplying power to the terminals + B and + 131 of the ECM.
Check for open in harness and connector
between IG switch and EFI main relay, EFI main
relay and body ground.
Check for open in harness and connector
between EFI main relay and battery, EFI main
relay and ECM.Check continuity between terminal E1 and
body ground.Proceed to next circuit inspection shown
on matrix chart (See page EG1±327).
Check for short in all the harness and
components connected to IGN fuse.
Check for short in all the harness and
components connected to EFI fuse.
ECM Power Source Circuit
Repair or replace harness or connector.
Repair or replace harness or connector. Check voltage of ECM power source.
DIAGNOSTIC CHART
Replace ignition switch.
Check EFI fuse.Replace EFI main relay.
Check ignition switch.Check EFI main relay.
Check IGN fuse.
± 5S±FE ENGINECIRCUIT INSPECTIONEG1±403

Remove EFI main relay from J/B No±2.
Check continuity between terminals of EFI main
relay shown below.
Remove IGN fuse from J/B No.1.
Check continuity of IGN fuse.(1) Apply battery voltage between terminals 1
and 2.
(2) Check continuity between terminals 3 and 5.
Check for short in all the harness and
components connected to IGN fuse (See
attached wiring diagram).
Check EFI main relay.
Continuity
(Reference value 72
)
Replace EFI main relay.
Check IGN fuse.
Terminals 3 and 5
Terminals 1 and 2
Terminals 3 and 5 ContinuityOpen
Continuity
± 5S±FE ENGINECIRCUIT INSPECTIONEG1±406

Check for open in harness and connector between IG switch and
EFI main relay, EFI main relay and body ground (See page IN±31).
Remove EFI fuse from J/B No.2.
Check continuity of EFI fuse.
Continuity
Check for open in harness and connector
between EFI main relay and battery, EFI main
relay and engine control module.Check for short in all the harness and
components connected to EFI fuse (See
attached wiring diagram). Remove under cover and finish panel.
Check continuity between terminals.
Repair or replace harness or connector.
Check ignition switch.
Replace ignition switch.
Check EFI fuse.
Switch positioncontinuity
10
AM2 Terminal
4
AM1 3
ACC6
ST27
ST19
IG2
START2
lG1
LOCK
ACC
± 5S±FE ENGINECIRCUIT INSPECTIONEG1±407

CIRCUIT DESCRIPTION
Battery positive voltage is supplied to terminal BATT of the ECM even when the ignition switch is off
for use by the diagnostic trouble code memory and air±fuel ratio adaptive control value memory, etc.
Back Up Power Source Circuit
Proceed to next circuit inspection
shown on matrix chart (See page EG1±327).Check and repair harness or connector
between battery, EFI fuse and ECU. Check for short in all the harness and
components connected to EFI fuse.
DIAGNOSTIC CHART
Check operation for the back up. Check voltage of terminal6ATT.
WIRING DIAGRAM
Check and replace ECM. Check EFI fuse.
± 5S±FE ENGINECIRCUIT INSPECTIONEG1±408

Remove glove compartment.
(See page EG1±234)
Measure voltage between terminal BATT of en±
gine control module connector and body ground.
Voltage: 9 ±14 V
Check voltage between terminal BATT of engine control module
connector and body ground.
Are the diagnostic trouble codes still in the memory when the
ignition switch is turned OFF?
Check and repair harness or connector
between engine control module and EN
fuse, EFI fuse and battery. Remove EFI fuse from J/B No.2.
Check continuity of EFI fuse.
Continuity
Check for short in all the harness and
components connected to EFI fuse
(See attached wiring diagram).
Proceed to next circuit inspection shown on
matrix chart (See page EG1±327).Check and replace engine control module.
INSPECTION PROCEDURE
Check EFI fuse.
Others
YES
± 5S±FE ENGINECIRCUIT INSPECTIONEG1±409

Reference INSPECTION USING OSCILLOSCOPE
INJECTOR SIGNAL WAVEFORM
wWith the engine idling measure waveform between terminals #10, #20 (#1, #2, #3 and #4*)
and E01 of engine control module.
HINT: The correct waveform appears as shown in the illustration on the below.
CIRCUIT DESCRIPTION
The injectors are provided to the intake manifold. They inject fuel into the cylinders based on the
signals from the engine control module.
Check continuity between terminals E01, E02
and body ground. Check voltage of terminals #10 and #20
(#1. #2. #3 and #4*).
Check for open in harness and connector
between ECM and battery.Check for short in all the harness and
components connected to AM2 fuse.
*: Only for California specification vehicles.
Injector Circuit
Repair or replace harness or connector.
DIAGNOSTIC CHART
Check operation for injectors.
Check and replace ECM.Replace injector. Check AM2 fuse.
± 5S±FE ENGINECIRCUIT INSPECTIONEG1±410

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

113 BODY ELECTRICALÐACCESSORIES
4. construction and Operation
Inflator and Bag for Front Passenger
1) General
The inflator and ag for front passenger are inserted inside the case, and located in the passenger side instrument panel.
the bag is made of strong nylon cloth, and becomes inflated by the argon gas flowed from the inflator. Also, 2 types
of the inflator for front passenger have been adopted: TRW made and Morton made.
2) Inflator of TRW Made
The inflator of TRW made is comprised of a squib, propellant grain, burst cup and high pressure argon gas.
If the airbag sensor is turned on by deceleration due to frontal collision, electric current then ignites the squib located
in the inflator. the frame of squib spreads instaneously to the propellant grain. If the internal pressure of the burst cup
increases by the combustion of the propellant grain, the burst cup will be released by making its bulkhead break. With
this, the gas which expanded by the tgeat of the ignition of the propellant grain flows into the airbag via the diffuser,
thus inflating the airbag.

Construction