2000 TOYOTA CAMRY O2 sensor

± DIAGNOSTICSENGINE (5S±FE)
DI±47
282 Author: Date:
DTC P0116 Engine Coolant Temp. Circuit Range/
Performance Problem
CIRCUIT DESCRIPTION
Refer to DTC P0115 (Engine Coolant Temp. Circuit Malfunction) on page DI±41.
DTC No.DTC Detecting ConditionTrouble Area
If THW < ±7°C (19.4°F) or THA < ±7°C (19.4°F) 20 min. or
more after starting engine, engine coolant temp. sensor value
is 30°C (86°F)*1 20°C (48°F)*2 or less
(2 trip detection logic)
If THW ±7°C (19.4°F) and THA
±7°C (19.4°F) and 10°C
(50°F) at engine start, 5 min. or more after starting engine,
engine coolant temp. sensor value is 30°C (86°F)*1 20°C
(48°F)*2 or less
(2 trip detection logic)
P0116 If THW
10°C (50°F) and THA
10°C (50°F) at engine
start, 2 min. or more after starting engine, engine coolant temp.
sensor value is 30°C (86°F)*1 20°C (48°F)*2 or less
(2 trip detection logic)
Engine coolant temp. sensor

Cooling system
When THW 35°C (95°F) and 60°C (140°F), THA

±6.7°C (19.9°F) when starting the engine, condition (a) and
(b) continues:
(a) Vehicle speed is changing (Not stable)
(b) Water temperature change is lower than 3°C (37.4°F) from
the water temperature since when sterting the engine
(2 trip detection logic)
*1: Except California Specification vehicles.
*2: Only for California Specification vehicles.
INSPECTION PROCEDURE
HINT:

If DTCs P0115 (Engine Coolant Temp. Circuit Malfunction) and P0116 (Engine Coolant Temp. Circuit
Range/Performance Problem) are output simultaneously, engine coolant temp. sensor circuit may be
open. Perform troubleshooting of DTC P0115 first.

Read freeze frame data using TOYOTA hand±held tester or OBD II scan tool. Because freeze frame
records the engine conditions when the malfunction is detected, when troubleshooting it is useful for
determining whether the vehicle was running or stopped, the engine warmed up or not, the air±fuel
ratio lean or rich, etc. at the time of the malfunction.
1 Are there any other codes (besides DTC P0116) being output?
YES Go to relevant DTC chart.
NO
DI00Q±05

DI±48
± DIAGNOSTICSENGINE (5S±FE)
283 Author: Date:
2 Check thermostat (See page CO±10).
NG Replace thermostat.
OK
Replace engine coolant temp. sensor.

P24296
Throttle Position
Sensor
VC
VTA
E2ECM
± DIAGNOSTICSENGINE (5S±FE)
DI±49
284 Author: Date:
DTC P0120 Throttle/Pedal Position Sensor/Switch ºAº
Circuit Malfunction
CIRCUIT DESCRIPTION
The throttle position sensor is mounted in the throttle body and
detects the throttle valve opening angle. When the throttle valve
is fully closed, a voltage of approximately 0.3 ~ 0.8 V is applied
to terminal VTA of the ECM. The voltage applied to the termi-
nals VTA of the ECM increases in proportion to the opening
angle of the throttle valve and becomes approximately 3.2 ~ 4.9
V when the throttle valve is fully opened. The ECM judges the
vehicle driving conditions from this signal input from terminal
VTA, and uses it as one of the conditions for deciding the air±
fuel ratio correction, power increase correction and fuel±cut
control etc.
DTC No.DTC Detecting ConditionTrouble Area
P0120
Condition (a) or (b) continues with more than 5 sec.:
(a) VTA < 0.1 V
(b) VTA > 4.9 V
Open or short in throttle position sensor circuit

Throttle position sensor

ECM
HINT:
After confirming DTC P0120, use the OBD II scan tool or TOYOTA hand±held tester to confirm the throttle
valve opening percentage.
Throttle valve opening position
expressed as percentage
Trouble Area
Throttle valve fully closedThrottle valve fully open
Trouble Area
0 %0 %VC line open
VTA line open or short
Approx. 100 %Approx. 100 %E2 line open
DI00R±05

A03595
Throttle Position Sensor
ECM
E8
E8 1
3
2Y
LG
BR1
11
9VC
VTA
E25 V
*1: w/o Immobiliser
*2: w/ Immobiliser(*2)
E8 E810
(*1)
DI±50
± DIAGNOSTICSENGINE (5S±FE)
285 Author: Date:
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT:

If DTCs P0105 (Manifold Absolute Pressure/Barometric Pressure Circuit Malfunction), P0106 (Man-
ifold Absolute Pressure /Barometric Pressure Circuit Range/Performance Problem), P0110 (Intake Air
Temp. Circuit Malfunction), P0115 (Engine Coolant Temp. Circuit Malfunction) and P0120 (Throttle/
Pedal Position Sensor/Switch ºAº Circuit Malfunction) are output simultaneously, E2 (sensor ground)
may be open.

Read freeze frame data using TOYOTA hand±held tester or OBD II scan tool. Because freeze frame
records the engine conditions when the malfunction is detected, when troubleshooting it is useful for
determining whether the vehicle was running or stopped, the engine warmed up or not, the air±fuel
ratio lean or rich, etc. at the time of the malfunction.

FI7052
A00369
ON
VC (+)
± DIAGNOSTICSENGINE (5S±FE)
DI±51
286 Author: Date:
1 Connect OBD II scan tool or TOYOTA hand±held tester, read the throttle valve
opening percentage.
PREPARATION:
(a) Connect the OBD II scan tool or TOYOTA hand±held tes-
ter to DLC3.
(b) Turn the ignition switch ON and push the OBD II scan tool
or TOYOTA hand±held tester main switch ON.
CHECK:
Read the throttle valve opening percentage.
OK:
Throttle valveThrottle valve opening position
expressed as percentage
Fully openApprox. 70 %
Fully closedApprox. 10 %
OK Check for intermittent problems
(See page DI±3).
NG
2 Check voltage between terminal VC of throttle position sensor connector and
body ground.
PREPARATION:
(a) Disconnect the throttle position sensor connector.
(b) Turn the ignition switch ON.
CHECK:
Measure voltage between terminal VC of the throttle position
connector and body ground.
OK:
Voltage: 4.5 ~ 5.5 V
NG Go to step 5.
OK

A03013A03413
ON
VTA
(+)E2
(±)
w/o Immobiliser
w/ Immobiliser
VTA
(+)E2
(±)
DI±52
± DIAGNOSTICSENGINE (5S±FE)
287 Author: Date:
3 Check throttle position sensor (See page SF±29).
NG Replace throttle position sensor.
OK
4 Check voltage between terminals VTA and E2 of ECM connector.
PREPARATION:
(a) Remove the glove compartment (See page SF±64).
(b) Turn the ignition switch ON.
CHECK:
Measure voltage between terminals VTA and E2 of the ECM
connector.
OK:
Throttle valveVoltage
Fully closed0.3 ~ 1.0 V
Fully open3.2 ~ 4.9 V
NG Check for open and short in harness and con-
nector between ECM and throttle position sen-
sor (VTA or E2 line) (See page IN±31).
OK
Check and replace ECM (See page IN±31).

A03008A03414
ON
VC
(+) E2
(±)
w/o Immobiliser
w/ Immobiliser
VC
(+) E2
(±)
± DIAGNOSTICSENGINE (5S±FE)
DI±53
288 Author: Date:
5 Check voltage between terminals VC and E2 of ECM connector.
PREPARATION:
(a) Remove the glove compartment (See page SF±64).
(b) Turn ignition switch ON.
CHECK:
Measure voltage between terminals VC and E2 of the ECM
connector.
OK:
Voltage: 4.5 ~ 5.5 V
NG Check and replace ECM (See page IN±31).
OK
Check for open in harness and connector be-
tween ECM and sensor (VC line)
(See page IN±31).

DI±54
± DIAGNOSTICSENGINE (5S±FE)
289 Author: Date:
DTC P0121 Throttle/Pedal Position Sensor/Switch ºAº
Circuit Range/Performance Problem
CIRCUIT DESCRIPTION
Refer to DTC P0120 (Throttle/Pedal Position Sensor/Switch "A" Circuit Malfunction) on page DI±49.
DTC No.Detection ItemTrouble Area
P0121
After vehicle speed has been exceeded 30 km/h (19 mph)
even once, output value of throttle position sensor is out of
applicable range while vehicle speed between 30 km/h (19
mph) and 0 km/h (0 mph)
(2 trip detection logic)

Throttle position sensor
INSPECTION PROCEDURE
HINT:
Read freeze frame data using TOYOTA hand±held tester or OBD II scan tool. Because freeze frame records
the engine conditions when the malfunction is detected, when troubleshooting it is useful for determining
whether the vehicle was running or stopped, the engine warmed up or not, the air±fuel ratio lean or rich, etc.
at the time of the malfunction.
1 Are there any other codes (besides DTC P0121) being output?
YES Go to relevant DTC chart.
NO
Replace throttle position sensor.
DI00S±04