2000 TOYOTA CAMRY wiring diagram

Does malfunction disappear when a good knock
sensor is installed? Check for open and short in harness and
connector between knock sensor and ECM.Repair or replace harness or
connector. Check no continuity of knock sensor circuit.
DIAGNOSTIC CHART
WIRING DIAGRAM
Check and replace ECM.Replace knock sensor.Replace knock sensor. Check knock sensor.
YES
± 5S±FE ENGINECIRCUIT INSPECTIONEG1±386

Check for open and short in harness and
connector between EFI main relay and ECM.
Check for open in harness and connector
between EGR gas temp. sensor and ECM. Check voltage of VSV for EGR Power source.
Repair or replace harness or
connector.
Repair or replace harness or
connector. Check resistance of EGR gas temp. sensor. Check EGR system (See page EG1±153) .
WIRING DIAGRAM
DIAGNOSTIC CHART
Check resistance of VSV for EG R.
Replace EGR gas temp. sensor.
Check and replace ECM.Check and replace ECM.Replace VSV for EG R.
Repair EGR system.
± 5S±FE ENGINECIRCUIT INSPECTIONEG1±392

CIRCUIT DESCRIPTION
Park/Neutral Position Switch Signal*
The ECM uses the signals from the park/neutral position switch to determine whether the transmis±
sion is in park or neutral, or in some other gear.
Air Conditioning Switch Signal
The ECM uses the output from the air conditioning switch to determine whether or not the air
conditioning is operating so that it can increase the idling speed of the engine if necessary.
Throttle Position Sensor IDL Signal
The IDL contacts are mounted in the throttle position sensor, and detects the idle condition.
(1) 3 sec. or more after engine starts with closed
throttle position switch OFF (IDL).
(2) * Park/ Neutral position switch OFF.
(Shift position in ªRº, ªDº, ª2º or ªLº positions).
(3) A/C switch ON.
*: Only vehicles with A/T.
HINT: In this circuit, diagnosis can only be made in the test mode.
wThrottle position sensor IDL circuit
wAccelerator pedal and cable
wPark/Neutral position switch circuit
wA/C switch circuit
wECM Diagnostic Trouble Code Detecting Condition
DIAGNOSTIC CHART
WIRING DIAGRAM
Trouble Area
DTC 51 Switch Condition Signal Circuit
DTC No.
± 5S±FE ENGINECIRCUIT INSPECTIONEG1±396

WIRING DIAGRAM
± 5S±FE ENGINECIRCUIT INSPECTIONEG1±401

WIRING DIAGRAM
± 5S±FE ENGINECIRCUIT INSPECTIONEG1±404

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