TOYOTA CAMRY 2000 Service Repair Manual

WIRING DIAGRAM
± 5S±FE ENGINECIRCUIT INSPECTIONEG1±401

(1) Connect terminals TE2 and E1 of DLC2.
(2) Turn ignition switch on.
(3) Crank the engine.
(4) Connect terminals TE1 and E1 of DLC2.
Check if diagnostic trouble code ª51º is output
when the shift lever is in the P and D shift positions.
Check for open in harness and connector between engine control
module and park/neutral position switch (See page
IN±31).
Check park/neutral position switch (See page
AX1±92). Check output condition of diagnostic trouble code 51.
Proceed to next circuit inspection shown on
matrix chart (See age EG1±327).
Replace park/neutral position switch.Check and replace engine control module.
Check and replace engine control module.Repair or replace harness or connector.
INSPECTION PROCEDURE
NG
Type II NG
Type I
Shift
Position
Go to stepGo to step
Normal Code
Normal Code Normal CodeNG Type
IIN G Type I
Code 51Code 51
Code 51Result
ºDºªPº
± 5S±FE ENGINECIRCUIT INSPECTIONEG1±402

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

WIRING DIAGRAM
± 5S±FE ENGINECIRCUIT INSPECTIONEG1±404

(1) Remove glove compartment.
(See page EG1±234)
(2) Turn ignition switch ON.
Measure voltage between terminals + B, + 131
and E1 of engine control module connector.
Voltage: 9 ±14 V
Check for open in harness and connector between terminal E1 of
engine control module and body ground (See page IN±31). Check voltage between terminals + B, + 131 and E1 of engine control
module connector.
Proceed to next circuit inspection shown on
matrix chart (See page EG1±327).
Repair or replace harness or connector.
INSPECTION PROCEDURE
± 5S±FE ENGINECIRCUIT INSPECTIONEG1±405

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