2000 TOYOTA CAMRY check engine

Disconnect the E F I fuse (15 A) for 10 sec. or more, with IG switch OFF.
Initiate test mode (Connect terminals TE2 and E1 of data link connector 1 or 2
with I G switch OFF).
Start the engine and warm up, with all ACC switch OFF.
After the engine is warmed up, let it drive at 50 ~ 55 mph (80 ~ 88 km/h)
for 10 min. or more.
After driving, stop at a safe place and perform idling for 2 min. or less.
After performing the idling in (4) , perform acceleration to 60 mph (96 km/h)
with the throttle valve fully open.
HINT: If a malfunction exists, the malfunction indicator lamp will light up during
step.
NOTICE: If the conditions in this test are not strictly followed, detection of the
malfunction will not be possible.
CIRCUIT DESCRIPTION (Cont'd)
DIAGNOSIS TROUBLE CODE DETECTION DRIVING PATTERN
Purpose of the driving pattern.
(a) To simulate diagnostic trouble code detecting condition after diagnostic trouble code is
recorded.
(b) To check that the malfunction is corrected when the repair is completed confirming that diagnos±
tic trouble code is no longer detected.
Malfunction: Open or Short in Sub Oxygen Sensor
± 5S±FE ENGINECIRCUIT INSPECTIONEG1±370

Check for open and short in harness and
connector between manifold absolute pressure
sensor and ECM.
Check and replace manifold absolute pressure
sensor.When diagnostic trouble code 31 is
displayed, check and replace ECM.
Repair or replace harness or
connector.
DIAGNOSTIC CHART
Check voltage of terminal PIM.Check voltage of terminal VC. Check and replace ECM.
DIA RAMWIRING DIAGRAM
± 5S±FE ENGINECIRCUIT INSPECTIONEG1±373

(1) Remove glove compartment.
(See page EG1±234).
(2) Turn ignition switch on.
Measure voltage between terminals VC and E2 of
engine control module connector.
Voltage: 4.5 ~ 5.5 V Check voltage between terminals VC and E2 of engine control
module connector.
Check and replace engine control module.
INSPECTION PROCEDURE
± 5S±FE ENGINECIRCUIT INSPECTIONEG1±374

Check for open and short in harness and connector between engine
control module and manifold absolute pressure sensor
(See page IN±31).
Turn ignition switch on
Check voltage between terminals PIM and E2 of engine control
module connector.
Check and replace manifold absolute pressure
sensor.When diagnostic trouble code 31 is dis-
played, check and replace engine control
module.
Repair or replace harness or connector. Voltage: 13 ± 3.9 V Measure voltage between terminals PI M
and E2 of engine control module connector.
± 5S±FE ENGINECIRCUIT INSPECTIONEG1±375

DIAGNOSTIC CHART
HINT: If diagnostic trouble codes ª22º (engine coolant temperature sensor circuit), ª24º (intake air
temperature sensor circuit),ª31º (manifold absolute pressure sensor circuit) and ª41º (throttle posi±
tion sensor circuit) are output simultaneously, E2 (sensor ground) may be open.
Check for open and short in harness and
connector between throttle position sensor and
ECM.Check for momentary interruption
(See page EG1±309).
Adjust or replace throttle position
sensor.
Repair or replace harness or
connector. Check operation for throttle position sensor.Check voltage of throttle position sensor.
WIRING DIAGRAM
Check and replace ECM.
± 5S±FE ENGINECIRCUIT INSPECTIONEG1±377

INSPECTION PROCEDURE
HINT: If diagnostic trouble code ª22º (engine coolant temperature sensor circuit), ª24º (intake air
temperature sensor circuit), ª31º (manifold absolute pressure sensor circuit) and ª41 ª (throttle
position sensor circuit) are output simultaneously, E2 (sensor ground) may be open.
(1) Remove glove compartment.
(See page EG1±234).
(2) Disconnect the vacuum hose from the throt±
tle body, then apply vacuum to the throttle
opener (See page EG1±204).
(3) Turn ignition switch ON.
Measure voltage between terminals VTA, IDL and
E2 of engine control module connector when the
throttle valve is opened gradually from the closed
condition.
Check voltage between terminals VTA, IDL and E2 of engine
control module connector.
The voltage should increase steadily in propor±
tion to the throttle valve opening angle.
Check for momentary interruption
(See page EG1±309).
Throttle Valve
Fully Closed
Fully OpenVTA ± E2 Terminal
IDL ± E2
± 5S±FE ENGINECIRCUIT INSPECTIONEG1±378

(1) Disconnect throttle position sensor connector.
(2) Disconnect the vacuum hose from the throt±
tle body, then apply vacuum to the throttle
opener (See page EG1±204).
Check for open and short in harness and connector between engine
control module and throttle position sensor (See page IN±31).
Resistance between terminals 3 (VTA) and 1
(E2) should increase gradually in accordance
with the throttle valve opening angle.
Adjust or replace throttle position sensor
(See page EG1±209).
Check throttle position sensor.
Check and replace engine control module.Repair or replace harness or connector.
3 (VTA) ± 1 (E2) 2 (IDL) ± 1 (E2)
Throttle Valve
Fully Closed
Fully OpenTerminal
Measure resistance between terminals 3 (VTA), 2
(IDL) and 1 (E2) of throttle position sensor con±
nector when the throttle valve is opened gradu±
ally from the closed condition.
± 5S±FE ENGINECIRCUIT INSPECTIONEG1±379

Check speedometer circuit.
(See page BE±66). Check speedometer circuit.
(See page BE±66).
DIAGNOSTIC CHART
Check operation of speedometer.
WIRING DIAGRAM
Check voltage of terminal SPD.
Check and replace ECM.
± 5S±FE ENGINECIRCUIT INSPECTIONEG1±381